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Posted to commits@servicecomb.apache.org by ni...@apache.org on 2019/11/07 12:20:59 UTC
[servicecomb-toolkit] 01/26: SCB-1548 import oas-validator

This is an automated email from the ASF dual-hosted git repository.

ningjiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/servicecomb-toolkit.git

commit 1a73501fa40f5e64653695569ae8a1293fc903e2
Author: Daniel Qian <ch...@gmail.com>
AuthorDate: Mon Oct 28 09:37:51 2019 +0800

    SCB-1548 import oas-validator
---
 oas-validator/.gitignore                           |  32 +
 oas-validator/.mvn/wrapper/maven-wrapper.jar       | Bin 0 -> 48336 bytes
 .../.mvn/wrapper/maven-wrapper.properties          |   1 +
 oas-validator/Jenkinsfile                          |  61 ++
 oas-validator/LICENSE                              | 201 ++++++
 oas-validator/README.md                            | 447 ++++++++++++
 oas-validator/distribution/pom.xml                 | 107 +++
 oas-validator/distribution/src/assembly/bin.xml    |  65 ++
 oas-validator/distribution/src/assembly/src.xml    |  66 ++
 oas-validator/distribution/src/release/LICENSE     | 437 ++++++++++++
 .../distribution/src/release/licenses/LICENSE-asm  |  27 +
 .../distribution/src/release/licenses/LICENSE-cc0  |  27 +
 .../src/release/licenses/LICENSE-cddl-gplv2        | 760 +++++++++++++++++++++
 .../src/release/licenses/LICENSE-cddl-v10          | 132 ++++
 .../src/release/licenses/LICENSE-epl-v10           |  86 +++
 .../src/release/licenses/LICENSE-hamcrest          |  27 +
 .../distribution/src/release/licenses/LICENSE-jopt |  22 +
 .../src/release/licenses/LICENSE-lombok            |  19 +
 .../distribution/src/release/licenses/LICENSE-mit  |  21 +
 .../src/release/licenses/LICENSE-mockito           |  21 +
 .../src/release/licenses/LICENSE-mpl-v20           | 373 ++++++++++
 .../distribution/src/release/licenses/LICENSE-qos  |  21 +
 .../src/release/licenses/LICENSE-slf4j             |  21 +
 .../src/release/licenses/LICENSE-webjars           |  21 +
 oas-validator/doc/INSTALLATION.MD                  |  36 +
 oas-validator/doc/USAGE.MD                         |  62 ++
 oas-validator/doc/compatibility-1.png              | Bin 0 -> 85796 bytes
 oas-validator/doc/compatibility-2.png              | Bin 0 -> 265492 bytes
 oas-validator/doc/compliance-1.png                 | Bin 0 -> 71215 bytes
 oas-validator/doc/compliance-2.png                 | Bin 0 -> 329424 bytes
 oas-validator/mvnw                                 | 227 ++++++
 oas-validator/mvnw.cmd                             | 145 ++++
 .../oas-validator-compatibility-spring/pom.xml     |  69 ++
 .../EncodingDiffValidatorsConfiguration.java       |  58 ++
 .../config/HeaderDiffValidatorsConfiguration.java  |  39 ++
 .../MediaTypeDiffValidatorsConfiguration.java      |  51 ++
 .../OperationDiffValidatorsConfiguration.java      |  39 ++
 .../ParameterDiffValidatorsConfiguration.java      |  59 ++
 .../PathItemDiffValidatorsConfiguration.java       |  33 +
 .../RequestBodyDiffValidatorsConfiguration.java    |  33 +
 .../ResponseDiffValidatorsConfiguration.java       |  33 +
 .../config/SchemaDiffValidatorsConfiguration.java  | 212 ++++++
 .../src/main/resources/META-INF/spring.factories   |  10 +
 oas-validator/oas-validator-compatibility/pom.xml  |  81 +++
 .../EncodingAddNotAllowedDiffValidator.java        |  38 ++
 ...EncodingAllowedReservedChangeDiffValidator.java |  58 ++
 .../EncodingContentTypeNotSameDiffValidator.java   |  51 ++
 .../EncodingDelNotAllowedDiffValidator.java        |  38 ++
 .../EncodingExplodeNotSameDiffValidator.java       |  51 ++
 .../EncodingStyleNotSameDiffValidator.java         |  52 ++
 ...derAddInRequestBodyNotAllowedDiffValidator.java |  45 ++
 ...HeaderDelInResponseNotAllowedDiffValidator.java |  45 ++
 ...aTypeAddInParameterNotAllowedDiffValidator.java |  46 ++
 ...aTypeDelInParameterNotAllowedDiffValidator.java |  46 ++
 ...ypeDelInRequestBodyNotAllowedDiffValidator.java |  46 ++
 ...iaTypeDelInResponseNotAllowedDiffValidator.java |  46 ++
 .../OperationDeleteNotAllowedDiffValidator.java    |  38 ++
 .../operation/OperationIdNotSameDiffValidator.java |  46 ++
 .../parameter/ParameterAddDiffValidator.java       |  55 ++
 ...arameterAllowEmptyValueChangeDiffValidator.java |  69 ++
 .../ParameterAllowReservedChangeDiffValidator.java |  68 ++
 .../ParameterExplodeNotSameDiffValidator.java      |  58 ++
 .../ParameterRequiredChangeDiffValidator.java      |  68 ++
 .../ParameterStyleNotSameDiffValidator.java        |  58 ++
 .../PathItemDeleteNotAllowedDiffValidator.java     |  39 ++
 .../RequestBodyRequiredChangeDiffValidator.java    |  61 ++
 .../ResponseAddNotAllowedDiffValidator.java        |  41 ++
 .../schema/SchemaDiscriminatorChangeValidator.java |  52 ++
 .../schema/SchemaPropertyChangeValidator.java      |  84 +++
 .../schema/SchemaReadOnlyChangeValidator.java      |  52 ++
 .../schema/SchemaTypeFormatChangeValidator.java    |  72 ++
 .../schema/SchemaWriteOnlyChangeValidator.java     |  52 ++
 .../schema/SchemaXmlChangeValidator.java           |  52 ++
 .../validators/schema/TypeFormat.java              |  68 ++
 .../SchemaEnumChangeInRequestValidator.java        |  58 ++
 ...maExclusiveMaximumChangeInRequestValidator.java |  60 ++
 ...maExclusiveMinimumChangeInRequestValidator.java |  58 ++
 .../SchemaMaxItemsChangeInRequestValidator.java    |  55 ++
 .../SchemaMaxLengthChangeInRequestValidator.java   |  55 ++
 ...chemaMaxPropertiesChangeInRequestValidator.java |  55 ++
 .../SchemaMaximumChangeInRequestValidator.java     |  57 ++
 .../SchemaMinItemsChangeInRequestValidator.java    |  55 ++
 .../SchemaMinLengthChangeInRequestValidator.java   |  55 ++
 ...chemaMinPropertiesChangeInRequestValidator.java |  55 ++
 .../SchemaMinimumChangeInRequestValidator.java     |  57 ++
 .../SchemaMultipleOfChangeInRequestValidator.java  |  56 ++
 .../SchemaNullableChangeInRequestValidator.java    |  58 ++
 .../SchemaRequiredChangeInRequestValidator.java    |  58 ++
 .../SchemaTypeFormatChangeInRequestValidator.java  |  75 ++
 .../SchemaUniqueItemsChangeInRequestValidator.java |  57 ++
 .../SchemaEnumChangeInResponseValidator.java       |  57 ++
 ...aExclusiveMaximumChangeInResponseValidator.java |  59 ++
 ...aExclusiveMinimumChangeInResponseValidator.java |  59 ++
 .../SchemaMaxItemsChangeInResponseValidator.java   |  54 ++
 .../SchemaMaxLengthChangeInResponseValidator.java  |  54 ++
 ...hemaMaxPropertiesChangeInResponseValidator.java |  54 ++
 .../SchemaMaximumChangeInResponseValidator.java    |  56 ++
 .../SchemaMinItemsChangeInResponseValidator.java   |  54 ++
 .../SchemaMinLengthChangeInResponseValidator.java  |  54 ++
 ...hemaMinPropertiesChangeInResponseValidator.java |  54 ++
 .../SchemaMinimumChangeInResponseValidator.java    |  56 ++
 .../SchemaMultipleOfChangeInResponseValidator.java |  55 ++
 .../SchemaNullableChangeInResponseValidator.java   |  57 ++
 .../SchemaRequiredChangeInResponseValidator.java   |  57 ++
 .../SchemaTypeFormatChangeInResponseValidator.java |  65 ++
 ...SchemaUniqueItemsChangeInResponseValidator.java |  56 ++
 .../validators/OasCompatibilityTestBase.java       |  37 +
 .../EncodingAddNotAllowedDiffValidatorTest.java    |  77 +++
 ...dingAllowedReservedChangeDiffValidatorTest.java |  89 +++
 ...ncodingContentTypeNotSameDiffValidatorTest.java |  88 +++
 .../EncodingDelNotAllowedDiffValidatorTest.java    |  77 +++
 .../EncodingExplodeNotSameDiffValidatorTest.java   |  88 +++
 .../EncodingStyleNotSameDiffValidatorTest.java     |  88 +++
 ...ddInRequestBodyNotAllowedDiffValidatorTest.java |  79 +++
 ...erDelInResponseNotAllowedDiffValidatorTest.java |  78 +++
 ...eAddInParameterNotAllowedDiffValidatorTest.java |  77 +++
 ...eDelInParameterNotAllowedDiffValidatorTest.java |  77 +++
 ...elInRequestBodyNotAllowedDiffValidatorTest.java |  77 +++
 ...peDelInResponseNotAllowedDiffValidatorTest.java |  78 +++
 ...OperationDeleteNotAllowedDiffValidatorTest.java |  74 ++
 .../OperationIdNotSameDiffValidatorTest.java       |  76 +++
 .../parameter/ParameterAddDiffValidatorTest.java   |  75 ++
 ...eterAllowEmptyValueChangeDiffValidatorTest.java |  83 +++
 ...ameterAllowReservedChangeDiffValidatorTest.java |  91 +++
 .../ParameterExplodeNotSameDiffValidatorTest.java  |  84 +++
 .../ParameterRequiredChangeDiffValidatorTest.java  |  83 +++
 .../ParameterStyleNotSameDiffValidatorTest.java    |  84 +++
 .../PathItemDeleteNotAllowedDiffValidatorTest.java |  72 ++
 ...RequestBodyRequiredChangeDiffValidatorTest.java |  76 +++
 .../ResponseAddNotAllowedDiffValidatorTest.java    |  83 +++
 .../SchemaDiscriminatorChangeValidatorTest.java    | 108 +++
 .../schema/SchemaReadOnlyChangeValidatorTest.java  | 108 +++
 .../schema/SchemaWriteOnlyChangeValidatorTest.java | 108 +++
 .../schema/SchemaXmlChangeValidatorTest.java       | 108 +++
 .../SchemaEnumChangeInRequestValidatorTest.java    |  92 +++
 ...clusiveMaximumChangeInRequestValidatorTest.java |  92 +++
 ...clusiveMinimumChangeInRequestValidatorTest.java |  92 +++
 ...SchemaMaxItemsChangeInRequestValidatorTest.java |  93 +++
 ...chemaMaxLengthChangeInRequestValidatorTest.java |  93 +++
 ...aMaxPropertiesChangeInRequestValidatorTest.java |  93 +++
 .../SchemaMaximumChangeInRequestValidatorTest.java |  93 +++
 ...SchemaMinItemsChangeInRequestValidatorTest.java |  93 +++
 ...chemaMinLengthChangeInRequestValidatorTest.java |  93 +++
 ...aMinPropertiesChangeInRequestValidatorTest.java |  93 +++
 .../SchemaMinimumChangeInRequestValidatorTest.java |  93 +++
 ...hemaMultipleOfChangeInRequestValidatorTest.java |  90 +++
 ...SchemaNullableChangeInRequestValidatorTest.java |  92 +++
 ...SchemaRequiredChangeInRequestValidatorTest.java |  90 +++
 ...hemaTypeFormatChangeInRequestValidatorTest.java |  91 +++
 ...emaUniqueItemsChangeInRequestValidatorTest.java |  92 +++
 .../SchemaEnumChangeInResponseValidatorTest.java   |  81 +++
 ...lusiveMaximumChangeInResponseValidatorTest.java |  81 +++
 ...lusiveMinimumChangeInResponseValidatorTest.java |  81 +++
 ...chemaMaxItemsChangeInResponseValidatorTest.java |  82 +++
 ...hemaMaxLengthChangeInResponseValidatorTest.java |  82 +++
 ...MaxPropertiesChangeInResponseValidatorTest.java |  82 +++
 ...SchemaMaximumChangeInResponseValidatorTest.java |  82 +++
 ...chemaMinItemsChangeInResponseValidatorTest.java |  82 +++
 ...hemaMinLengthChangeInResponseValidatorTest.java |  82 +++
 ...MinPropertiesChangeInResponseValidatorTest.java |  82 +++
 ...SchemaMinimumChangeInResponseValidatorTest.java |  82 +++
 ...emaMultipleOfChangeInResponseValidatorTest.java |  79 +++
 ...chemaNullableChangeInResponseValidatorTest.java |  81 +++
 ...chemaRequiredChangeInResponseValidatorTest.java |  80 +++
 ...emaTypeFormatChangeInResponseValidatorTest.java |  80 +++
 ...maUniqueItemsChangeInResponseValidatorTest.java |  81 +++
 .../encoding/petstore-encoding-add-a.yaml          |  52 ++
 .../encoding/petstore-encoding-add-b.yaml          |  54 ++
 .../petstore-encoding-allow-reserved-a.yaml        |  56 ++
 .../petstore-encoding-allow-reserved-b.yaml        |  56 ++
 .../encoding/petstore-encoding-content-type-a.yaml |  52 ++
 .../encoding/petstore-encoding-content-type-b.yaml |  52 ++
 .../encoding/petstore-encoding-del-a.yaml          |  54 ++
 .../encoding/petstore-encoding-del-b.yaml          |  52 ++
 .../encoding/petstore-encoding-explode-a.yaml      |  53 ++
 .../encoding/petstore-encoding-explode-b.yaml      |  53 ++
 .../encoding/petstore-encoding-style-a.yaml        |  53 ++
 .../encoding/petstore-encoding-style-b.yaml        |  53 ++
 .../petstore-header-add-in-request-body-a.yaml     |  52 ++
 .../petstore-header-add-in-request-body-b.yaml     |  56 ++
 .../header/petstore-header-del-in-response-a.yaml  |  46 ++
 .../header/petstore-header-del-in-response-b.yaml  |  43 ++
 .../petstore-media-type-add-in-parameter-a.yaml    |  42 ++
 .../petstore-media-type-add-in-parameter-b.yaml    |  46 ++
 .../petstore-media-type-del-in-parameter-a.yaml    |  46 ++
 .../petstore-media-type-del-in-parameter-b.yaml    |  42 ++
 .../petstore-media-type-del-in-request-body-a.yaml |  47 ++
 .../petstore-media-type-del-in-request-body-b.yaml |  44 ++
 .../petstore-media-type-del-in-response-a.yaml     |  46 ++
 .../petstore-media-type-del-in-response-b.yaml     |  43 ++
 .../operation/petstore-operation-delete-a.yaml     |  39 ++
 .../operation/petstore-operation-delete-b.yaml     |  32 +
 .../operation/petstore-operation-id-a.yaml         |  39 ++
 .../operation/petstore-operation-id-b.yaml         |  39 ++
 .../parameter/petstore-parameter-add-a.yaml        |  38 ++
 .../parameter/petstore-parameter-add-b.yaml        |  44 ++
 .../petstore-parameter-allow-empty-value-a.yaml    |  41 ++
 .../petstore-parameter-allow-empty-value-b.yaml    |  43 ++
 .../petstore-parameter-allow-reserved-a.yaml       |  41 ++
 .../petstore-parameter-allow-reserved-b.yaml       |  43 ++
 .../parameter/petstore-parameter-explode-a.yaml    |  41 ++
 .../parameter/petstore-parameter-explode-b.yaml    |  43 ++
 .../parameter/petstore-parameter-required-a.yaml   |  41 ++
 .../parameter/petstore-parameter-required-b.yaml   |  43 ++
 .../parameter/petstore-parameter-style-a.yaml      |  41 ++
 .../parameter/petstore-parameter-style-b.yaml      |  43 ++
 .../pathitem/petstore-path-item-delete-a.yaml      |  59 ++
 .../pathitem/petstore-path-item-delete-b.yaml      |  59 ++
 .../petstore-request-body-required-a.yaml          |  51 ++
 .../petstore-request-body-required-b.yaml          |  51 ++
 .../response/petstore-response-add-a.yaml          |  39 ++
 .../response/petstore-response-add-b.yaml          |  43 ++
 .../schema/petstore-schema-discriminator-a.yaml    | 108 +++
 .../schema/petstore-schema-discriminator-b.yaml    | 108 +++
 .../schema/petstore-schema-read-only-a.yaml        |  75 ++
 .../schema/petstore-schema-read-only-b.yaml        |  75 ++
 .../schema/petstore-schema-write-only-a.yaml       |  77 +++
 .../schema/petstore-schema-write-only-b.yaml       |  77 +++
 .../validators/schema/petstore-schema-xml-a.yaml   |  72 ++
 .../validators/schema/petstore-schema-xml-b.yaml   |  78 +++
 .../request/petstore-schema-enum-in-request-a.yaml |  69 ++
 .../request/petstore-schema-enum-in-request-b.yaml |  66 ++
 ...tore-schema-exclusive-maximum-in-request-a.yaml |  66 ++
 ...tore-schema-exclusive-maximum-in-request-b.yaml |  66 ++
 ...tore-schema-exclusive-minimum-in-request-a.yaml |  66 ++
 ...tore-schema-exclusive-minimum-in-request-b.yaml |  66 ++
 .../petstore-schema-max-items-in-request-a.yaml    |  72 ++
 .../petstore-schema-max-items-in-request-b.yaml    |  72 ++
 .../petstore-schema-max-length-in-request-a.yaml   |  64 ++
 .../petstore-schema-max-length-in-request-b.yaml   |  64 ++
 ...etstore-schema-max-properties-in-request-a.yaml |  64 ++
 ...etstore-schema-max-properties-in-request-b.yaml |  64 ++
 .../petstore-schema-maximum-in-request-a.yaml      |  64 ++
 .../petstore-schema-maximum-in-request-b.yaml      |  64 ++
 .../petstore-schema-min-items-in-request-a.yaml    |  72 ++
 .../petstore-schema-min-items-in-request-b.yaml    |  72 ++
 .../petstore-schema-min-length-in-request-a.yaml   |  64 ++
 .../petstore-schema-min-length-in-request-b.yaml   |  64 ++
 ...etstore-schema-min-properties-in-request-a.yaml |  64 ++
 ...etstore-schema-min-properties-in-request-b.yaml |  64 ++
 .../petstore-schema-minimum-in-request-a.yaml      |  64 ++
 .../petstore-schema-minimum-in-request-b.yaml      |  64 ++
 .../petstore-schema-multiple-of-in-request-a.yaml  |  65 ++
 .../petstore-schema-multiple-of-in-request-b.yaml  |  65 ++
 .../petstore-schema-nullable-in-request-a.yaml     |  63 ++
 .../petstore-schema-nullable-in-request-b.yaml     |  64 ++
 .../petstore-schema-required-in-request-a.yaml     |  62 ++
 .../petstore-schema-required-in-request-b.yaml     |  66 ++
 .../petstore-schema-type-format-in-request-a.yaml  |  62 ++
 .../petstore-schema-type-format-in-request-b.yaml  |  62 ++
 .../petstore-schema-unique-items-in-request-a.yaml |  73 ++
 .../petstore-schema-unique-items-in-request-b.yaml |  72 ++
 .../petstore-schema-enum-in-response-a.yaml        |  47 ++
 .../petstore-schema-enum-in-response-b.yaml        |  48 ++
 ...ore-schema-exclusive-maximum-in-response-a.yaml |  47 ++
 ...ore-schema-exclusive-maximum-in-response-b.yaml |  47 ++
 ...ore-schema-exclusive-minimum-in-response-a.yaml |  47 ++
 ...ore-schema-exclusive-minimum-in-response-b.yaml |  47 ++
 .../petstore-schema-max-items-in-response-a.yaml   |  50 ++
 .../petstore-schema-max-items-in-response-b.yaml   |  50 ++
 .../petstore-schema-max-length-in-response-a.yaml  |  46 ++
 .../petstore-schema-max-length-in-response-b.yaml  |  46 ++
 ...tstore-schema-max-properties-in-response-a.yaml |  46 ++
 ...tstore-schema-max-properties-in-response-b.yaml |  46 ++
 .../petstore-schema-maximum-in-response-a.yaml     |  46 ++
 .../petstore-schema-maximum-in-response-b.yaml     |  46 ++
 .../petstore-schema-min-items-in-response-a.yaml   |  50 ++
 .../petstore-schema-min-items-in-response-b.yaml   |  50 ++
 .../petstore-schema-min-length-in-response-a.yaml  |  46 ++
 .../petstore-schema-min-length-in-response-b.yaml  |  46 ++
 ...tstore-schema-min-properties-in-response-a.yaml |  46 ++
 ...tstore-schema-min-properties-in-response-b.yaml |  46 ++
 .../petstore-schema-minimum-in-response-a.yaml     |  46 ++
 .../petstore-schema-minimum-in-response-b.yaml     |  46 ++
 .../petstore-schema-multiple-of-in-response-a.yaml |  49 ++
 .../petstore-schema-multiple-of-in-response-b.yaml |  49 ++
 .../petstore-schema-nullable-in-response-a.yaml    |  46 ++
 .../petstore-schema-nullable-in-response-b.yaml    |  46 ++
 .../petstore-schema-required-in-response-a.yaml    |  49 ++
 .../petstore-schema-required-in-response-b.yaml    |  47 ++
 .../petstore-schema-type-format-in-response-a.yaml |  46 ++
 .../petstore-schema-type-format-in-response-b.yaml |  46 ++
 ...petstore-schema-unique-items-in-response-a.yaml |  50 ++
 ...petstore-schema-unique-items-in-response-b.yaml |  50 ++
 .../oas-validator-compliance-spring/pom.xml        |  68 ++
 .../config/ComponentsValidatorConfiguration.java   |  68 ++
 .../config/EncodingValidatorConfiguration.java     |  33 +
 .../config/HeaderValidatorConfiguration.java       |  33 +
 .../config/InfoValidatorConfiguration.java         |  33 +
 .../config/OpenApiValidatorConfiguration.java      |  45 ++
 .../config/OperationValidatorConfiguration.java    |  52 ++
 .../config/ParameterValidatorConfiguration.java    |  53 ++
 .../config/PathsValidatorConfiguration.java        |  33 +
 .../config/RequestBodyValidatorConfiguration.java  |  33 +
 .../config/ResponseValidatorConfiguration.java     |  33 +
 .../config/SchemaValidatorConfiguration.java       |  38 ++
 .../config/TagValidatorConfiguration.java          |  45 ++
 .../src/main/resources/META-INF/spring.factories   |  13 +
 oas-validator/oas-validator-compliance/pom.xml     |  78 +++
 .../components/ComponentsKeysValidators.java       |  59 ++
 .../validator/encoding/EncodingKeysValidators.java |  31 +
 .../header/HeaderDescriptionRequiredValidator.java |  56 ++
 .../info/InfoDescriptionRequiredValidator.java     |  56 ++
 .../openapi/OpenApiSecurityEmptyValidator.java     |  57 ++
 .../openapi/OpenApiTagNotEmptyValidator.java       |  53 ++
 .../validator/openapi/OpenApiVersionValidator.java |  53 ++
 .../OperationIdLowerCamelCaseValidator.java        |  47 ++
 .../operation/OperationServersEmptyValidator.java  |  50 ++
 .../OperationSummaryRequiredValidator.java         |  56 ++
 .../operation/OperationTagsOnlyOneValidator.java   |  54 ++
 .../operation/OperationTagsReferenceValidator.java |  76 +++
 .../ParameterCookieLowerCamelCaseValidator.java    |  57 ++
 .../ParameterDescriptionRequiredValidator.java     |  56 ++
 .../ParameterHeaderUpperHyphenCaseValidator.java   |  58 ++
 .../ParameterPathLowerCamelCaseValidator.java      |  57 ++
 .../ParameterQueryLowerCamelCaseValidator.java     |  57 ++
 .../paths/PathsLowerCamelCaseValidator.java        | 102 +++
 .../RequestBodyDescriptionRequiredValidator.java   |  56 ++
 .../validator/response/ResponseKeysValidators.java |  31 +
 .../validator/schema/SchemaKeysValidators.java     |  31 +
 .../validator/schema/SchemaTitleValidator.java     |  73 ++
 .../tag/TagDescriptionRequiredValidator.java       |  56 ++
 .../tag/TagNameUpperCamelCaseValidator.java        |  48 ++
 .../validator/tag/TagReferenceValidator.java       |  89 +++
 .../validator/OasComplianceTestBase.java           |  36 +
 ...onentsCallbacksUpperCamelCaseValidatorTest.java |  72 ++
 ...ponentsExamplesUpperCamelCaseValidatorTest.java |  72 ++
 ...mponentsHeadersUpperCamelCaseValidatorTest.java |  72 ++
 ...ComponentsLinksUpperCamelCaseValidatorTest.java |  72 ++
 ...nentsParametersUpperCamelCaseValidatorTest.java |  72 ++
 ...tsRequestBodiesUpperCamelCaseValidatorTest.java |  72 ++
 ...onentsResponsesUpperCamelCaseValidatorTest.java |  72 ++
 ...mponentsSchemasUpperCamelCaseValidatorTest.java |  72 ++
 .../HeaderDescriptionRequiredValidatorTest.java    |  81 +++
 .../info/InfoDescriptionRequiredValidatorTest.java |  62 ++
 .../openapi/OpenApiSecurityEmptyValidatorTest.java |  67 ++
 .../openapi/OpenApiTagsSizeValidatorTest.java      |  60 ++
 .../openapi/OpenApiVersionValidatorTest.java       |  61 ++
 .../OperationIdLowerCamelCaseValidatorTest.java    |  67 ++
 .../OperationServersEmptyValidatorTest.java        |  68 ++
 .../OperationSummaryRequiredValidatorTest.java     |  67 ++
 .../OperationTagsOnlyOneValidatorTest.java         |  66 ++
 .../OperationTagsReferenceValidatorTest.java       |  66 ++
 ...ParameterCookieLowerCamelCaseValidatorTest.java |  77 +++
 .../ParameterDescriptionRequiredValidatorTest.java |  76 +++
 ...arameterHeaderUpperHyphenCaseValidatorTest.java |  77 +++
 .../ParameterPathLowerCamelCaseValidatorTest.java  |  77 +++
 .../ParameterQueryLowerCamelCaseValidatorTest.java |  77 +++
 .../paths/PathsLowerCamelCaseValidatorTest.java    |  76 +++
 ...equestBodyDescriptionRequiredValidatorTest.java |  77 +++
 ...aPropertiesKeysLowerCamelCaseValidatorTest.java | 251 +++++++
 .../validator/schema/SchemaTitleValidatorTest.java | 104 +++
 .../tag/TagDescriptionRequiredValidatorTest.java   |  61 ++
 .../tag/TagNameUpperCamelCaseValidatorTest.java    |  63 ++
 .../validator/tag/TagReferenceValidatorTest.java   |  62 ++
 .../petstore-callbacks-upper-camel-case.yaml       | 124 ++++
 .../petstore-examples-upper-camel-case.yaml        |  90 +++
 .../petstore-headers-upper-camel-case.yaml         |  90 +++
 .../petstore-links-upper-camel-case.yaml           |  90 +++
 .../petstore-parameters-upper-camel-case.yaml      |  96 +++
 .../petstore-request-bodies-upper-camel-case.yaml  | 104 +++
 .../petstore-responses-upper-camel-case.yaml       |  90 +++
 .../petstore-schemas-upper-camel-case.yaml         |  91 +++
 .../validator/header/petstore-header-no-desc.yaml  | 143 ++++
 .../validator/info/petstore-info-no-desc.yaml      | 125 ++++
 .../validator/openapi/petstore-openapi-wrong.yaml  | 125 ++++
 .../openapi/petstore-security-empty-good.yaml      |  30 +
 .../validator/openapi/petstore-security-empty.yaml |  33 +
 .../openapi/petstore-tag-not-provided.yaml         | 125 ++++
 .../petstore-operation-id-lower-camel-case.yaml    | 125 ++++
 .../petstore-operation-servers-empty.yaml          |  38 ++
 .../petstore-operation-summary-required.yaml       | 124 ++++
 .../petstore-operation-tags-only-one.yaml          | 126 ++++
 .../petstore-operation-tags-reference.yaml         | 128 ++++
 ...petstore-parameter-cookie-lower-camel-case.yaml |  88 +++
 .../parameter/petstore-parameter-desc-none.yaml    |  84 +++
 ...etstore-parameter-header-upper-hyphen-case.yaml |  88 +++
 .../petstore-parameter-path-lower-camel-case.yaml  |  84 +++
 .../petstore-parameter-query-lower-camel-case.yaml |  88 +++
 .../paths/petstore-paths-lower-camel-case.yaml     | 127 ++++
 .../petstore-request-body-desc-required.yaml       | 105 +++
 ...tore-schema-p-keys-lower-camel-case-all-of.yaml |  40 ++
 ...tore-schema-p-keys-lower-camel-case-any-of.yaml |  40 ++
 ...store-schema-p-keys-lower-camel-case-array.yaml |  41 ++
 ...tstore-schema-p-keys-lower-camel-case-comp.yaml |  39 ++
 ...tore-schema-p-keys-lower-camel-case-nested.yaml |  42 ++
 ...tore-schema-p-keys-lower-camel-case-one-of.yaml |  40 ++
 ...ore-schema-p-keys-lower-camel-case-param-1.yaml |  39 ++
 ...ore-schema-p-keys-lower-camel-case-param-2.yaml |  41 ++
 ...store-schema-p-keys-lower-camel-case-req-1.yaml |  40 ++
 ...store-schema-p-keys-lower-camel-case-req-2.yaml |  42 ++
 ...tore-schema-p-keys-lower-camel-case-resp-1.yaml |  39 ++
 ...tore-schema-p-keys-lower-camel-case-resp-2.yaml |  44 ++
 .../schema/petstore-schema-title-comp.yaml         |  37 +
 .../schema/petstore-schema-title-nested.yaml       |  42 ++
 .../schema/petstore-schema-title-param.yaml        |  37 +
 .../schema/petstore-schema-title-req.yaml          |  38 ++
 .../schema/petstore-schema-title-resp.yaml         |  37 +
 .../petstore-tag-name-not-upper-camel-case.yaml    | 127 ++++
 .../validator/tag/petstore-tag-no-desc.yaml        | 127 ++++
 .../validator/tag/petstore-tag-redundant.yaml      | 128 ++++
 oas-validator/oas-validator-core-spring/pom.xml    |  63 ++
 .../OasDiffValidatorsSkeletonConfiguration.java    | 229 +++++++
 .../config/OasValidatorsSkeletonConfiguration.java | 218 ++++++
 .../src/main/resources/META-INF/spring.factories   |   3 +
 oas-validator/oas-validator-core/pom.xml           |  74 ++
 .../toolkit/oasv/common/OasObjectProperty.java     |  76 +++
 .../oasv/common/OasObjectPropertyLocation.java     | 120 ++++
 .../toolkit/oasv/common/OasObjectType.java         |  57 ++
 .../diffvalidation/api/CallbackDiffValidator.java  |  23 +
 .../api/ComponentsDiffValidator.java               |  23 +
 .../api/DefaultOasSpecDiffValidator.java           |  49 ++
 .../diffvalidation/api/DiffViolationMessages.java  |  29 +
 .../diffvalidation/api/EncodingDiffValidator.java  |  23 +
 .../diffvalidation/api/ExampleDiffValidator.java   |  23 +
 .../diffvalidation/api/HeaderDiffValidator.java    |  23 +
 .../oasv/diffvalidation/api/InfoDiffValidator.java |  23 +
 .../oasv/diffvalidation/api/LinkDiffValidator.java |  23 +
 .../api/ListPropertyDiffValidator.java             |  66 ++
 .../api/MapPropertyDiffValidator.java              |  60 ++
 .../diffvalidation/api/MediaTypeDiffValidator.java |  23 +
 .../api/OasDiffValidationContext.java              |  58 ++
 .../api/OasDiffValidationException.java            |  40 ++
 .../oasv/diffvalidation/api/OasDiffViolation.java  |  90 +++
 .../diffvalidation/api/OasObjectDiffValidator.java |  45 ++
 .../api/OasObjectDiffValidatorTemplate.java        |  86 +++
 .../diffvalidation/api/OasSpecDiffValidator.java   |  31 +
 .../api/ObjectPropertyDiffValidator.java           |  70 ++
 .../diffvalidation/api/OpenApiDiffValidator.java   |  23 +
 .../diffvalidation/api/OperationDiffValidator.java |  23 +
 .../diffvalidation/api/ParameterDiffValidator.java |  23 +
 .../diffvalidation/api/PathItemDiffValidator.java  |  23 +
 .../diffvalidation/api/PathsDiffValidator.java     |  23 +
 .../api/RequestBodyDiffValidator.java              |  23 +
 .../diffvalidation/api/ResponseDiffValidator.java  |  23 +
 .../diffvalidation/api/ResponsesDiffValidator.java |  23 +
 .../diffvalidation/api/SchemaAddValidator.java     |  38 ++
 .../diffvalidation/api/SchemaCompareValidator.java |  46 ++
 .../diffvalidation/api/SchemaDelValidator.java     |  38 ++
 .../diffvalidation/api/SchemaDiffValidator.java    |  23 +
 .../api/SecuritySchemeDiffValidator.java           |  23 +
 .../diffvalidation/api/ServerDiffValidator.java    |  23 +
 .../oasv/diffvalidation/api/TagDiffValidator.java  |  23 +
 .../ComponentsCallbacksDiffValidator.java          |  54 ++
 .../ComponentsExamplesDiffValidator.java           |  54 ++
 .../components/ComponentsHeadersDiffValidator.java |  54 ++
 .../components/ComponentsLinksDiffValidator.java   |  54 ++
 .../ComponentsParametersDiffValidator.java         |  54 ++
 .../ComponentsRequestBodiesDiffValidator.java      |  54 ++
 .../ComponentsResponsesDiffValidator.java          |  54 ++
 .../encoding/EncodingHeadersDiffValidator.java     |  54 ++
 .../skeleton/header/HeaderSchemaDiffValidator.java |  53 ++
 .../mediatype/MediaTypeEncodingDiffValidator.java  |  64 ++
 .../mediatype/MediaTypeSchemaDiffValidator.java    |  53 ++
 .../openapi/OpenApiComponentsDiffValidator.java    |  55 ++
 .../skeleton/openapi/OpenApiInfoDiffValidator.java |  54 ++
 .../openapi/OpenApiPathsDiffValidator.java         |  54 ++
 .../openapi/OpenApiServersDiffValidator.java       |  53 ++
 .../skeleton/openapi/OpenApiTagsDiffValidator.java |  53 ++
 .../OperationParametersDiffValidator.java          |  52 ++
 .../OperationRequestBodyDiffValidator.java         |  55 ++
 .../operation/OperationResponsesDiffValidator.java |  54 ++
 .../parameter/ParameterContentDiffValidator.java   |  68 ++
 .../parameter/ParameterSchemaDiffValidator.java    |  67 ++
 .../pathitem/PathItemOperationsDiffValidator.java  | 118 ++++
 .../pathitem/PathItemParametersDiffValidator.java  |  58 ++
 .../paths/PathsPathItemsDiffValidator.java         |  77 +++
 .../RequestBodyContentDiffValidator.java           |  68 ++
 .../response/ResponseContentDiffValidator.java     |  68 ++
 .../response/ResponseHeadersDiffValidator.java     |  69 ++
 .../responses/ResponsesResponsesDiffValidator.java | 102 +++
 .../skeleton/schema/SchemaDiffValidatorEngine.java | 222 ++++++
 .../diffvalidation/util/ChangeRangeCheckUtils.java |  38 ++
 .../util/OasDiffValidationContextUtils.java        |  64 ++
 .../util/OasObjectDiffValidatorUtils.java          | 264 +++++++
 .../oasv/diffvalidation/util/ParameterUtils.java   |  33 +
 .../oasv/util/DefaultOasSpecSyntaxChecker.java     |  42 ++
 .../toolkit/oasv/util/OasSpecParseException.java   |  39 ++
 .../toolkit/oasv/util/OasSpecParser.java           |  36 +
 .../toolkit/oasv/util/OasSpecSyntaxChecker.java    |  36 +
 .../toolkit/oasv/util/StringCaseUtils.java         |  57 ++
 .../oasv/validation/api/CallbackValidator.java     |  26 +
 .../oasv/validation/api/ComponentsValidator.java   |  26 +
 .../validation/api/DefaultOasSpecValidator.java    |  47 ++
 .../oasv/validation/api/EncodingValidator.java     |  26 +
 .../oasv/validation/api/ExampleValidator.java      |  26 +
 .../oasv/validation/api/HeaderValidator.java       |  26 +
 .../toolkit/oasv/validation/api/InfoValidator.java |  27 +
 .../toolkit/oasv/validation/api/LinkValidator.java |  26 +
 .../api/ListPropertyRequiredValidator.java         |  56 ++
 .../oasv/validation/api/ListPropertyValidator.java |  62 ++
 .../validation/api/MapPropertyKeysValidator.java   |  67 ++
 .../validation/api/MapPropertyValuesValidator.java |  63 ++
 .../oasv/validation/api/MediaTypeValidator.java    |  27 +
 .../oasv/validation/api/OasObjectValidator.java    |  38 ++
 .../oasv/validation/api/OasSpecValidator.java      |  31 +
 .../oasv/validation/api/OasValidationContext.java  |  47 ++
 .../toolkit/oasv/validation/api/OasViolation.java  |  74 ++
 .../api/ObjectPropertyRequiredValidator.java       |  62 ++
 .../validation/api/ObjectPropertyValidator.java    |  67 ++
 .../oasv/validation/api/OpenApiValidator.java      |  27 +
 .../oasv/validation/api/OperationValidator.java    |  26 +
 .../oasv/validation/api/ParameterValidator.java    |  26 +
 .../oasv/validation/api/PathItemValidator.java     |  26 +
 .../oasv/validation/api/PathsValidator.java        |  26 +
 .../oasv/validation/api/RequestBodyValidator.java  |  26 +
 .../oasv/validation/api/ResponseValidator.java     |  27 +
 .../oasv/validation/api/ResponsesValidator.java    |  27 +
 .../oasv/validation/api/SchemaValidator.java       |  27 +
 .../validation/api/SecuritySchemeValidator.java    |  26 +
 .../oasv/validation/api/ServerValidator.java       |  27 +
 .../toolkit/oasv/validation/api/TagValidator.java  |  26 +
 .../oasv/validation/api/ViolationMessages.java     |  34 +
 .../ComponentsCallbacksKeysValidator.java          |  55 ++
 .../ComponentsCallbacksValuesValidator.java        |  59 ++
 .../ComponentsExamplesKeysValidator.java           |  53 ++
 .../ComponentsExamplesValuesValidator.java         |  57 ++
 .../components/ComponentsHeadersKeysValidator.java |  49 ++
 .../ComponentsHeadersValuesValidator.java          |  57 ++
 .../components/ComponentsLinksKeysValidator.java   |  49 ++
 .../components/ComponentsLinksValuesValidator.java |  59 ++
 .../ComponentsParametersKeysValidator.java         |  49 ++
 .../ComponentsParametersValuesValidator.java       |  57 ++
 .../ComponentsRequestBodiesKeysValidator.java      |  49 ++
 .../ComponentsRequestBodiesValuesValidator.java    |  57 ++
 .../ComponentsResponsesKeysValidator.java          |  49 ++
 .../ComponentsResponsesValuesValidator.java        |  57 ++
 .../components/ComponentsSchemasKeysValidator.java |  49 ++
 .../ComponentsSchemasValuesValidator.java          |  57 ++
 .../ComponentsSecuritySchemesKeysValidator.java    |  49 ++
 .../ComponentsSecuritySchemesValuesValidator.java  |  57 ++
 .../encoding/EncodingHeadersKeysValidator.java     |  55 ++
 .../encoding/EncodingHeadersValuesValidator.java   |  59 ++
 .../skeleton/header/HeaderSchemaValidator.java     |  60 ++
 .../mediatype/MediaTypeEncodingValidator.java      |  63 ++
 .../mediatype/MediaTypeSchemaValidator.java        |  62 ++
 .../openapi/OpenApiComponentsValidator.java        |  64 ++
 .../skeleton/openapi/OpenApiInfoValidator.java     |  60 ++
 .../skeleton/openapi/OpenApiPathsValidator.java    |  63 ++
 .../skeleton/openapi/OpenApiServersValidator.java  |  62 ++
 .../skeleton/openapi/OpenApiTagsValidator.java     |  62 ++
 .../operation/OperationParametersValidator.java    |  62 ++
 .../operation/OperationRequestBodyValidator.java   |  63 ++
 .../operation/OperationResponsesValidator.java     |  62 ++
 .../parameter/ParameterContentValidator.java       |  63 ++
 .../parameter/ParameterSchemaValidator.java        |  63 ++
 .../pathitem/PathItemOperationsValidator.java      |  67 ++
 .../pathitem/PathItemParametersValidator.java      |  62 ++
 .../skeleton/paths/PathsPathItemsValidator.java    |  61 ++
 .../requestbody/RequestBodyContentValidator.java   |  64 ++
 .../response/ResponseContentValidator.java         |  63 ++
 .../response/ResponseHeadersKeysValidator.java     |  55 ++
 .../response/ResponseHeadersValuesValidator.java   |  59 ++
 .../responses/ResponsesResponsesValidator.java     |  62 ++
 .../schema/SchemaPropertiesKeysValidator.java      |  71 ++
 .../schema/SchemaRecursiveValidatorTemplate.java   | 127 ++++
 .../validation/util/OasObjectValidatorUtils.java   | 169 +++++
 .../toolkit/oasv/util/StringCaseUtilsTest.java     | 175 +++++
 oas-validator/oas-validator-test/pom.xml           |  63 ++
 .../servicecomb/toolkit/oasv/OasSpecLoader.java    |  71 ++
 .../test/OasDiffValidatorTestBase.java             |  80 +++
 .../oasv/validation/test/OasValidatorTestBase.java |  52 ++
 oas-validator/oas-validator-web/pom.xml            | 130 ++++
 .../servicecomb/toolkit/oasv/web/Application.java  |  48 ++
 .../api/controller/CompatibilityController.java    | 125 ++++
 .../web/api/controller/ComplianceController.java   | 119 ++++
 .../oasv/web/api/controller/ImportError.java       |  84 +++
 .../oasv/web/api/controller/ImportError2.java      |  74 ++
 .../oasv/web/page/controller/EditorController.java |  36 +
 .../oasv/web/page/controller/IndexController.java  |  34 +
 .../web/page/controller/ValidatorController.java   |  52 ++
 .../oasv/web/page/controller/ViewerController.java |  36 +
 .../src/main/resources/application.properties      |  30 +
 .../resources/samples/petstore-openapi-wrong.yaml  | 125 ++++
 .../src/main/resources/static/doc/validator.html   | 587 ++++++++++++++++
 .../src/main/resources/templates/index.html        |  77 +++
 .../templates/validator/compatibility.html         | 165 +++++
 .../resources/templates/validator/compliance.html  | 164 +++++
 oas-validator/pom.xml                              | 315 +++++++++
 579 files changed, 38363 insertions(+)

diff --git a/oas-validator/.gitignore b/oas-validator/.gitignore
new file mode 100755
index 0000000..a8d4d48
--- /dev/null
+++ b/oas-validator/.gitignore
@@ -0,0 +1,32 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
+
+*/target
+*.class
\ No newline at end of file
diff --git a/oas-validator/.mvn/wrapper/maven-wrapper.jar b/oas-validator/.mvn/wrapper/maven-wrapper.jar
new file mode 100755
index 0000000..f775b1c
Binary files /dev/null and b/oas-validator/.mvn/wrapper/maven-wrapper.jar differ
diff --git a/oas-validator/.mvn/wrapper/maven-wrapper.properties b/oas-validator/.mvn/wrapper/maven-wrapper.properties
new file mode 100755
index 0000000..eb91947
--- /dev/null
+++ b/oas-validator/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1 @@
+distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.3.3/apache-maven-3.3.3-bin.zip
\ No newline at end of file
diff --git a/oas-validator/Jenkinsfile b/oas-validator/Jenkinsfile
new file mode 100755
index 0000000..ea54d66
--- /dev/null
+++ b/oas-validator/Jenkinsfile
@@ -0,0 +1,61 @@
+pipeline {
+  agent any
+
+  triggers {
+    // 每30分钟检查一下GIT仓库
+    pollSCM '*/30 * * * *'
+  }
+
+  options {
+    // 禁止因Multibranch pipeline index动作触发构建
+    overrideIndexTriggers false
+    // 禁止并发构建
+    disableConcurrentBuilds()
+    // 构建结果保留天数10天，最多保留10个
+    buildDiscarder logRotator(daysToKeepStr: '30', numToKeepStr: '10')
+    // 控制台打出时间戳
+    // timestamps()
+    // 构建超时设置：15分钟
+    timeout(30)
+  }
+
+  stages {
+
+    stage('Build & Test') {
+
+      steps {
+        withMaven(
+          // Jenkins全局工具设置的Maven的名字
+          maven: 'Maven3',
+          // Jenkins全局工具设置的JDK的名字，有JDK6，JDK7，JDK8可选
+          jdk: 'JDK8',
+          // 指定maven本地仓库路径为项目working dir下的.local-m2-reop，可以避免因并发构建导致本地仓库混乱的问题
+          mavenLocalRepo: '.local-m2-repo'
+        ) {
+          sh 'mvn -f ./ clean install'
+        }
+      }
+
+    }
+
+
+  }
+
+  post {
+    always {
+      // 发送邮件到本次change所包含的committer
+      emailext recipientProviders: [developers()],
+        subject: "Pipeline [${currentBuild.fullDisplayName}] built ${currentBuild.currentResult}",
+        body: "More details: ${currentBuild.absoluteUrl}"
+
+    }
+    cleanup {
+      // 清空workspace，节省Jenkins服务器磁盘空间
+      echo 'Cleanup workspace'
+      withMaven(maven: 'Maven3', jdk: 'JDK8', mavenLocalRepo: '.local-m2-repo', publisherStrategy: 'EXPLICIT') {
+        sh 'mvn -f ./ clean'
+      }
+
+    }
+  }
+}
diff --git a/oas-validator/LICENSE b/oas-validator/LICENSE
new file mode 100755
index 0000000..261eeb9
--- /dev/null
+++ b/oas-validator/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
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+   6. Trademarks. This License does not grant permission to use the trade
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
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+   Unless required by applicable law or agreed to in writing, software
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diff --git a/oas-validator/README.md b/oas-validator/README.md
new file mode 100755
index 0000000..c9b5e07
--- /dev/null
+++ b/oas-validator/README.md
@@ -0,0 +1,447 @@
+# OAS Validator
+
+OpenAPI V3 Spec校验工具。
+
+[TOC]
+
+## 项目结构
+
+* oas-validator-core，核心API及骨架实现
+* oas-validator-core-spring，骨架的Spring Boot Autoconfiguration
+* oas-validator-test，核心API的测试帮助类
+* oas-validator-compliance，合规性校验实现
+* oas-validator-compliance-spring，合规性校验的Spring Boot Autoconfiguration
+* oas-validator-compatibility，兼容性校验实现
+* oas-validator-compatibility-spring，兼容性校验实现的Spring Boot Autoconfiguration
+* oas-validator-web，校验工具的操作UI
+
+
+
+## 校验工具安装
+
+[安装文档](./doc/INSTALLATION.MD)
+
+
+
+## 校验工具使用
+
+[使用文档](./doc/USAGE.MD)
+
+
+
+## 合规性校验
+
+OAS必须符合[OAS 3.0.2规范][openapi-3.0.2]（比如属性的名称、REQUIED要求）。除此之外则是我们自己的定义的合规性检查。
+
+### 一些字符串匹配规则
+
+* <a name="lower-camel-case"></a>Lower Camel Case：首字母小写的驼峰，对应的正则`^[a-z]+((\d)|([A-Z0-9][a-z0-9]+))*([A-Z])?$`
+* <a name="upper-camel-case"></a>Upper Camel Case：首字母大写的驼峰，对应的正则`^[A-Z]([a-z0-9]+[A-Z]?)*$`
+* <a name="upper-hyphen-case"></a>Upper Hyphen Case：单词首字母大写，多个单词用`-`连接，比如`Content-Type`、`Accept`、`X-Rate-Limit-Limit`。对应的正则：`^([A-Z][a-z0-9]*-)*([A-Z][a-z0-9]*)$`
+
+### OpenAPI Object [doc][spec-openapi]
+
+<a name="openapi-compliance"></a>
+
+* `openapi`属性必须为3.0.x且>=3.0.2
+* `info`属性见[Info Object合规性检查](#info-compliance)
+* `paths`属性，必须提供见[Paths Object合规性检查](#paths-compliance)
+* `components`属性见[Components Object合规性检查](#components-compliance)
+* `tags`属性，至少提供一个[Tag Object][spec-tag]
+  * 见[Tag Object合规性检查](#tag-compliance)
+* `security`属性，不允许提供
+
+### Info Object [doc][spec-info]
+
+<a name="info-compliance"></a>
+
+* `description`属性，必须填写
+
+### Tag Object [doc][spec-tag]
+
+<a name="tag-compliance"></a>
+
+- `name`属性，必须是[Upper Camel Case](#upper-camel-case)
+- `description`属性，必须填写
+- 不得存在[Operation Object][spec-operation]没有引用过的tag
+
+### Paths Object [doc][spec-paths]
+
+<a name="paths-compliance"></a>
+
+* path必须是[Lower Camel Case](#lower-camel-case)，包括[Path Templating][spec-path-templating]中的变量
+  * 见[Path Item Object合规性检查](#path-item-compliance)
+
+### Path Item Object [doc][spec-path-item]
+
+<a name="path-item-compliance"></a>
+
+* `get/post/put/delete/...`属性，见[Operation Object合规性检查](operation-compliance)
+* `parameters`属性，见[Parameter Object合规性检查](#parameter-compliance)
+
+### Operation Object [doc][spec-operation]
+
+<a name="operation-compliance"></a>
+
+* `summary`属性、必须填写
+* `operationId`属性，且[Lower Camel Case](#lower-camel-case)
+* `parameters`属性，见[Parameter Object合规性检查](#parameter-compliance)
+* `requestBody`属性，见[Request Body Object合规性检查](#request-body-compliance)
+* `responses`属性，见[Responses Object合规性检查](#responses-compliance)
+* `tags`属性，且只能写一个tag，且必须在[OpenAPI Object][spec-openapi] 的 `tags`属性里所定义的范围内
+  
+* `servers`属性，不允许提供
+
+### Parameter Object [doc][spec-parameter]
+
+<a name="parameter-compliance"></a>
+
+* `description`属性，必须填写
+* `name`属性
+  * 如果`in`为path、query、cookie，则那么必须是[Lower Camel Case](#lower-camel-case)
+  * 如果`in`为header，则那么必须是[Upper Hyphen Case](#upper-hyphen-case)
+* `schema`属性，见[Schema Object合规性检查](#schema-compliance)
+* `content`属性，见[Media Type Object合规性检查](#media-type-compliance)
+
+### Request Body Object [doc][spec-request-body]
+
+<a name="request-body-compliance"></a>
+
+* `description`属性，必须填写
+* `content`属性，见[Media Type Object合规性检查](#media-type-compliance)
+
+### Media Type Object [doc][spec-media-type]
+
+<a name="media-type-compliance"></a>
+
+* `schema`属性，必须填写。见[Schema Object合规性检查](#schema-compliance)
+* `encoding`属性，见[Encoding Object合规性检查](#encoding-compliance)
+
+### Responses Object [doc][spec-responses]
+
+<a name="responses-compliance"></a>
+
+* 见[Response Object合规性检查](#response-compliance)
+
+### Response Object [doc][spec-response]
+
+<a name="response-compliance"></a>
+
+* `description`属性，必须填写
+* `headers`属性，name（`headers`的key）必须是[Upper Hyphen Case](#upper-hyphen-case)
+  * 见[Header Object合规性检查](#header-compliance)
+* `content`属性，见[Media Type Object合规性检查](#media-type-compliance)
+
+### Schema Object [doc][spec-schema]
+
+<a name="schema-compliance"></a>
+
+* `title`属性，如果上级是[Schema Object][spec-schema]或[Components Object][spec-components]，那么必须填写
+* `properties`属性，name（`properties`的key）必须是[Lower Camel Case](#lower-camel-case)
+  * Sub Schema见[Schema Object合规性检查](#schema-compliance)
+
+### Encoding Object [doc][spec-encoding]
+
+<a name="encoding-compliance"></a>
+
+* `headers`属性，name（`headers`的key）必须是[Upper Hyphen Case](#upper-hyphen-case)
+  * 见[Header Object合规性检查](#header-compliance)
+
+### Header Object [doc][spec-header]
+
+<a name="header-compliance"></a>
+
+* `description`属性，必须填写
+* `schema`属性，见[Schema Object合规性检查](#schema-compliance)
+* `content`属性，见[Media Type Object合规性检查](#media-type-compliance)
+
+### Components Object [doc][spec-components]
+
+<a name="components-compliance"></a>
+
+* `schemas`属性，name必须是[Upper Camel Case](#upper-camel-case)
+  * 见[Schema Object合规性检查](#schema-compliance)
+* `responses`属性，name必须是[Upper Camel Case](#upper-camel-case)
+  * 见[Response Object合规性检查](#response-compliance)
+* `parameters`属性，name必须是[Upper Camel Case](#upper-camel-case)
+  * 见[Parameter Object合规性检查](#parameter-compliance)
+* `examples`属性，name必须是[Upper Camel Case](#upper-camel-case)
+* `requestBodies`属性，name必须是[Upper Camel Case](#upper-camel-case)
+  * 见[Request Body合规性检查](#request-body-compliance)
+* `headers`属性，name必须是[Upper Hyphen Case](#upper-hyphen-case)
+  * 见[Header合规性检查](#header-compliance)
+* `links`属性，name必须是[Upper Camel Case](#upper-camel-case)
+* `callbacks`属性，name必须是[Upper Camel Case](#upper-camel-case)
+
+## 兼容性检查
+
+对新旧两个版本的OAS做兼容性检查。
+
+OAS可以使用[Reference Object][spec-reference]来描述Spec，两个不同的OAS会出现描述不同但语义相同的情况。比如下面的旧OAS没有使用[Reference Object][spec-reference]，而新OAS则使用了的情况：
+
+旧OAS
+
+```yaml
+openapi: "3.0.0"
+info:
+  version: 1.0.0
+  title: Swagger Petstore
+  license:
+    name: MIT
+servers:
+  - url: http://petstore.swagger.io/v1
+paths:
+  /pets:
+    post:
+      summary: List all pets
+      operationId: listPets
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: array
+              items:
+                type: object
+                properties:
+                  Foo:
+                    type: string
+      responses:
+        '200':
+          description: A paged array of pets
+```
+
+新OAS
+
+```yaml
+paths:
+  /pets:
+    post:
+      operationId: listPets
+      requestBody:
+        content:
+          application/json: 
+            schema:
+              $ref: '#/components/schemas/Foo'
+      responses:
+        '200':
+          description: A paged array of pets
+components:
+  schemas:
+    Foo:
+      type: array
+      items:
+        type: object
+        properties:
+          Foo:
+            type: string
+```
+
+因此在检查兼容性的时候会将新旧OAS的[Reference Object][spec-reference]做解析，然后再检查，下面是一段[swagger-parser][swagger-parser]的例子：
+
+```java
+OpenAPIV3Parser parser = new OpenAPIV3Parser();
+
+ParseOptions parseOptions = new ParseOptions();
+parseOptions.setResolve(true);
+parseOptions.setResolveCombinators(true);
+parseOptions.setResolveFully(true);
+parseOptions.setFlatten(false);
+
+SwaggerParseResult parseResult = parser.readContents(content, null, parseOptions);
+```
+
+因此，检查下来如果发现不兼容，那么所报告的位置会和原文档有所不同。
+
+### Paths Object [doc][spec-paths]
+
+<a name="paths-compatibility"></a>
+
+* 新OAS必须包含旧OAS的所有的`path`，如果`path`使用了[Path Templating][spec-path-templating]，只要变量名发生了变化，那么即使语义上相同也会被认为不同，比如`/pets/{foo}`和`/pets/{bar}`会被认定为不同。
+  * 见[Path Item Object兼容性检查](#path-item-compatibility)
+
+### Path Item Object [doc][spec-path-item]
+
+<a name="path-item-compatibility"></a>
+
+* 新OAS必须包含旧OAS的所有的get/put/post/delete/...[Operation Object][spec-operation]
+
+### Operation Object [doc][spec-operation]
+
+<a name="operation-compatibility"></a>
+
+* `operationId`属性，新旧OAS必须完全一致。
+* `parameters`属性，对它检查须在考虑到[Path Item Object parameters属性][spec-path-item-parameters]的情况下进行：
+  * 新OAS可以新增[Parameter Object][spec-parameter]，但是新增的[Parameter Object][spec-parameter]的`required`属性必须为`false`
+  * 新OAS可以删除[Parameter Object][spec-parameter]
+  * 针对单个[Parameter Object][spec-parameter]的修改的检查见[Parameter Object兼容性检查](#parameter-compatibility)（在同一个[Operation Object][spec-operation]下[Parameter Object][spec-parameter]依靠`name`和`in`两个属性作为ID）。
+* `requestBody`属性，见[Request Body Object兼容性检查](#request-body-compatibility)
+* `responses`属性，见[Responses Object兼容性检查](#responses-compatibility)
+
+### Parameter Object [doc][spec-parameter]
+
+<a name="parameter-compatibility"></a>
+
+* `required`属性，只允许`true(旧) -> false(新)`
+* `allowEmptyValue`属性，只允许`false(旧) -> true(新)`的变化
+* `style`属性，新旧OAS必须保持一致
+* `explode`属性，新旧OAS必须保持一致
+* `allowReserved`属性，只允许`false(旧) -> true(新)`的变化
+* `schema`属性，见[Schema Object兼容性检查](#schema-compatibility)
+* `content`属性，新OAS必须包含旧OAS的所有media type（`content`的key），且不能新增media type
+  * 见[Media Type Object兼容性检查](#media-type-compatibility)
+
+### Request Body Object [doc][spec-request-body]
+
+<a name="request-body-compatibility"></a>
+
+* `content`属性，新OAS必须包含旧OAS的所有media type（`content`的key）
+  * 见[Media Type Object兼容性检查](#media-type-compatibility)
+* `required`属性，只允许`true(旧) -> false(新)`的变化
+
+### Media Type Object [doc][spec-media-type]
+
+<a name="media-type-compatibility"></a>
+
+* `schema`属性，见[Schema Object兼容性检查](#schema-compatibility)
+* `encoding`属性，该属性仅适用于`requestBody`，因此新旧OAS的property name（`encoding`的key）必须完全一致
+  * 见[Encoding Object兼容性检查](#encoding-compatibility)
+
+### Responses Object [doc][spec-responses]
+
+<a name="responses-compatibility"></a>
+
+* `default`属性，如果旧OAS没有定义`default`，那么新OAS也不能定义`default`。
+* `{Http Status Code}`属性，新OAS不允许新增。
+* 见[Response Object兼容性检查](#response-compatibility)
+
+### Response Object [doc][spec-response]
+
+<a name="response-compatibility"></a>
+
+* `headers`属性，新OAS必须包含旧OAS的所有header name（`headers`的key），可以新增header name
+  * [Header Object][spec-header]见[Header Object兼容性检查](#header-compatibility)
+* `content`属性，新OAS必须包含旧OAS的所有media type（`content`的key），可以新增media type
+  - [Media Type Object][spec-media-type]见[Media Type Object兼容性检查](#media-type-compatibility)
+
+### Schema Object [doc][spec-schema]
+
+<a name="schema-compatibility"></a>
+
+OAS中定义，Schema Object可以直接或间接用在：
+
+* 请求类：[Parameter Object][spec-parameter]、[Request Body Object][spec-request-body]、[Header Object][spec-header]
+* 响应类：[Header Object][spec-header]、[Response Object][spec-response]
+
+不同用途的兼容性检查规则有所不同。
+
+### 用做请求时
+
+原则上，当Schema Object用在请求时，只允许从紧到松的变化。
+
+* `type, format`组合所允许的变化范围
+
+| 旧(type,format)  | 新(type,format)                                              |
+| ---------------- | ------------------------------------------------------------ |
+| integer, null    | integer, int64<br />number, double<br />number, null         |
+| integer, int32   | integer, int64<br />integer, null<br />number, float<br />number, double<br />number, null |
+| integer, int64   | integer, null<br />number, double<br />number, null          |
+| number, null     | number, double                                               |
+| number, float    | number, null<br />number, double                             |
+| number, double   | number, null                                                 |
+| string, null     | string, password                                             |
+| string, password | string, null                                                 |
+
+* `allOf`、`oneOf`、`anyOf`属性，在combine之后再做检查
+* `multipleOf`属性，如果旧OAS为null。新OAS必须==旧OAS或者新OAS是旧OAS的因子，比如6(旧)->3(新)
+* `maximum`、`maxLength`、`maxItems`、`maxProperties`，如果旧OAS为null，那么新OAS也必须是null。其他情况，新OAS必须>=旧OAS。
+* `minimum`、`minLenght`、`minItems`、`minProperties`，如果旧OAS为null，那么新OAS也必须是null。其他情况，新OAS必须<=旧OAS。
+* `exclusiveMaximum`、`exclusiveMinimum`属性，仅允许`true(旧)->false(新)`的变化
+* `uniqueItems`属性，只允许`true(旧)->false(新)`的变化。
+* `required`属性，新OAS必须==旧OAS，或者新OAS是旧OAS的子集。
+* `enum`属性，新OAS必须==旧OAS，或者新OAS是旧OAS的超集。
+* `properties`属性，新OAS可以新增property name（`properties`的key）或者减少property name。
+* `nullable`属性，只允许`false(旧)->true(新)`的变化。
+* `discriminator`属性，新旧OAS必须完全一致。
+* `xml`属性，新旧OAS必须完全一致。
+* `readOnly`、`writeOnly`，新旧OAS必须完全一致。
+
+### 用做响应时
+
+原则上，当Schema Object用在响应时，只允许从松到紧的变化。
+
+* `type, format`组合所允许的变化范围
+
+| 旧(type,format)  | 新(type,format)                    |
+| ---------------- | ---------------------------------- |
+| integer, null    | integer, int64<br />integer, int32 |
+| integer, int64   | integer, null<br />interger, int32 |
+| number, null     | number, double<br />number, float  |
+| number, double   | number, null<br />number, float    |
+| string, null     | string, password                   |
+| string, password | string, null                       |
+
+* `allOf`、`oneOf`、`anyOf`属性，在combine之后再做检查
+* `multipleOf`属性，如果旧OAS为null。新OAS必须==旧OAS或者新OAS是旧OAS的倍数，比如3(旧)->6(新)
+* `maximum`、`maxLength`、`maxItems`、`maxProperties`，如果旧OAS为null，那么新OAS也必须是null。其他情况，新OAS必须<=旧OAS。
+* `minimum`、`minLenght`、`minItems`、`minProperties`，如果旧OAS为null，那么新OAS也必须是null。其他情况，新OAS必须>=旧OAS。
+* `exclusiveMaximum`、`exclusiveMinimum`属性，仅允许`false(旧)->true(新)`的变化
+* `uniqueItems`属性，只允许`false(旧)->true(新)`的变化。
+* `required`属性，新OAS必须==旧OAS或者，新OAS是旧OAS的超集。
+* `enum`属性，新OAS必须==旧OAS，或者新OAS是旧OAS的子集。
+* `properties`属性，新OAS可以新增property name（`properties`的key）或者减少property name。
+* `nullable`属性，只允许`true(旧)->false(新)`的变化。
+* `discriminator`属性，新旧OAS必须完全一致。
+* `xml`属性，新旧OAS必须完全一致。
+* `readOnly`、`writeOnly`，新旧OAS必须完全一致。
+
+### Encoding Object [doc][spec-encoding]
+
+<a name="encoding-compatibility"></a>
+
+PS. Encoding Object仅针对Request Body Object有用
+
+* `contentType`属性，新旧OAS必须保持一致
+* `headers`属性，新OAS必须包含旧OAS的所有header name（`headers`的key），且不能新增header name，但是可以减少header name
+  * [Header Object][spec-header]见[Header Object兼容性检查](#header-compatibility)
+* `style`属性，新旧OAS必须保持一致
+* `explode`属性，新旧OAS必须保持一致
+* `allowReserved`属性，只允许`false(旧) -> true(新)`的变化
+
+### Header Object [doc][spec-header]
+
+<a name="header-compatibility"></a>
+
+- `schema`属性，见[Schema Object兼容性检查](#schema-compatibility)
+
+### Components Object [doc][spec-components]
+
+<a name="components-compatibility"></a>
+
+[Components Object][spec-components]定义的都是可复用OAS Object，而在检查兼容性的时候所有`$ref`都已被解析了，因此不需要对[Components Object][spec-components]的属性做兼容性检查。
+
+
+[spec-operation]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject
+[openapi-3.0.2]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md
+[spec-openapi]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#openapi-object
+[spec-server]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#serverObject
+[spec-info]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#infoObject
+[spec-paths]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#paths-object
+[spec-path-item]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#pathItemObject
+[spec-parameter]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject
+[spec-request-body]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#requestBodyObject
+[spec-security-scheme]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#securitySchemeObject
+[spec-components]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object
+[spec-tag]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#tagObject
+[spec-schema]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#schemaObject
+
+[spec-media-type]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#media-type-object
+[spec-response]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#response-object
+[spec-path-templating]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#path-templating
+[spec-parameterIn]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterIn
+[spec-encoding]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#encodingObject
+[spec-header]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object
+[spec-info]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#infoObject
+[spec-reference]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#reference-object
+[swagger-parser]: https://github.com/swagger-api/swagger-parser
+[spec-path-item-parameters]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#user-content-pathitemparameters
+[spec-responses]: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responsesObject
\ No newline at end of file
diff --git a/oas-validator/distribution/pom.xml b/oas-validator/distribution/pom.xml
new file mode 100755
index 0000000..2e7cf98
--- /dev/null
+++ b/oas-validator/distribution/pom.xml
@@ -0,0 +1,107 @@
+<?xml version="1.0"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.servicecomb.toolkit</groupId>
+    <artifactId>oas-validator-parent</artifactId>
+    <version>0.2.0-SNAPSHOT</version>
+  </parent>
+  <artifactId>oas-validator-distribution</artifactId>
+  <packaging>pom</packaging>
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-core</artifactId>
+      <version>0.2.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-core-spring</artifactId>
+      <version>0.2.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-test</artifactId>
+      <version>0.2.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-compliance</artifactId>
+      <version>0.2.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-compliance-spring</artifactId>
+      <version>0.2.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-compatibility</artifactId>
+      <version>0.2.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-compatibility-spring</artifactId>
+      <version>0.2.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-web</artifactId>
+      <version>0.2.0-SNAPSHOT</version>
+    </dependency>
+  </dependencies>
+  <profiles>
+    <profile>
+      <id>release</id>
+      <build>
+        <plugins>
+          <plugin>
+            <artifactId>maven-assembly-plugin</artifactId>
+            <executions>
+              <execution>
+                <id>bin</id>
+                <phase>package</phase>
+                <goals>
+                  <goal>single</goal>
+                </goals>
+                <configuration>
+                  <descriptors>
+                    <descriptor>src/assembly/bin.xml</descriptor>
+                  </descriptors>
+                </configuration>
+              </execution>
+              <execution>
+                <id>src</id>
+                <phase>package</phase>
+                <goals>
+                  <goal>single</goal>
+                </goals>
+                <configuration>
+                  <descriptors>
+                    <descriptor>src/assembly/src.xml</descriptor>
+                  </descriptors>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
+</project>
diff --git a/oas-validator/distribution/src/assembly/bin.xml b/oas-validator/distribution/src/assembly/bin.xml
new file mode 100755
index 0000000..cb908a3
--- /dev/null
+++ b/oas-validator/distribution/src/assembly/bin.xml
@@ -0,0 +1,65 @@
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
+    <includeBaseDirectory>true</includeBaseDirectory>
+    <baseDirectory>${project.build.finalName}-bin</baseDirectory>
+    <id>bin</id>
+    <formats>
+        <format>zip</format>
+    </formats>
+    <fileSets>
+        <fileSet>
+            <directory>../doc</directory>
+            <outputDirectory>/doc</outputDirectory>
+        </fileSet>
+        <fileSet>
+            <directory>../</directory>
+            <outputDirectory>/</outputDirectory>
+            <includes>
+                <include>README.md</include>
+            </includes>
+        </fileSet>
+        <!-- include the LICENSE file from release directory -->
+        <fileSet>
+            <directory>src/release</directory>
+            <outputDirectory>/</outputDirectory>
+            <includes>
+                <include>LICENSE</include>
+                <include>licenses/**</include>
+            </includes>
+        </fileSet>
+        <!-- include alpha server exec into bin directory -->
+        <fileSet>
+            <directory>../oas-validator-web//target</directory>
+            <outputDirectory>/</outputDirectory>
+            <includes>
+                <include>oas-validator-web-exec.jar</include>
+            </includes>
+            <fileMode>0755</fileMode>
+        </fileSet>
+    </fileSets>
+    <dependencySets>
+        <dependencySet>
+            <useProjectArtifact>true</useProjectArtifact>
+            <unpack>false</unpack>
+            <outputDirectory>/libs</outputDirectory>
+            <scope>runtime</scope>
+        </dependencySet>
+    </dependencySets>
+</assembly>
diff --git a/oas-validator/distribution/src/assembly/src.xml b/oas-validator/distribution/src/assembly/src.xml
new file mode 100755
index 0000000..b365db5
--- /dev/null
+++ b/oas-validator/distribution/src/assembly/src.xml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Licensed to the Apache Software Foundation (ASF) under one or more
+    contributor license agreements.  See the NOTICE file distributed with
+    this work for additional information regarding copyright ownership.
+    The ASF licenses this file to You under the Apache License, Version 2.0
+    (the "License"); you may not use this file except in compliance with
+    the License.  You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+-->
+<assembly>
+  <id>src</id>
+  <formats>
+    <format>zip</format>
+  </formats>
+  <includeBaseDirectory>true</includeBaseDirectory>
+  <baseDirectory>${project.build.finalName}-src</baseDirectory>
+  <fileSets>
+    <!-- Binary Files -->
+    <fileSet>
+      <directory>..</directory>
+      <outputDirectory></outputDirectory>
+      <includes>
+        <include>**/*</include>
+      </includes>
+      <!-- excludes the binary files -->
+      <excludes>
+        <!-- exclude the mvn wrapper in the source artifact -->
+        <exclude>Jenkinsfile</exclude>
+        <exclude>mvnw*</exclude>
+        <exclude>.mvn/**</exclude>
+
+        <exclude>**/eclipse-classes/**</exclude>
+        <exclude>**/target/**</exclude>
+        <exclude>**/build/**</exclude>
+        <exclude>**/eclipse-classes/**</exclude>
+        <exclude>**/.*</exclude>
+        <exclude>**/.*/**</exclude>
+        <exclude>*.enc</exclude>
+        <exclude>*.gpg</exclude>
+        <exclude>random_seed</exclude>
+        <exclude>**/surefire*</exclude>
+        <exclude>**/svn-commit*</exclude>
+
+        <exclude>**/.idea/**</exclude>
+        <exclude>**/*.iml</exclude>
+        <exclude>**/*.ipr</exclude>
+        <exclude>**/*.iws</exclude>
+
+        <exclude>**/cobertura.ser</exclude>
+
+        <exclude>**/node_modules/**</exclude>
+      </excludes>
+    </fileSet>
+
+  </fileSets>
+</assembly>
diff --git a/oas-validator/distribution/src/release/LICENSE b/oas-validator/distribution/src/release/LICENSE
new file mode 100755
index 0000000..d649bec
--- /dev/null
+++ b/oas-validator/distribution/src/release/LICENSE
@@ -0,0 +1,437 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+       http://www.apache.org/licenses/LICENSE-2.0
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+================================================================
+This product bundles the following libraries which are licensed
+under the Apache License v2.
+For details, see their respective project links.
+
+* Apache Commons Codec (commons-codec:commons-codec:1.9 - http://commons.apache.org/proper/commons-codec/)
+* Apache Commons Collections (org.apache.commons:commons-collections4:4.3 - http://commons.apache.org/proper/commons-collections/)
+* Apache Commons Lang (org.apache.commons:commons-lang3:3.8.1 - http://commons.apache.org/proper/commons-lang/)
+* Apache Commons Logging (commons-logging:commons-logging:1.2 - http://commons.apache.org/proper/commons-logging/)
+* Apache HttpClient (org.apache.httpcomponents:httpclient:4.5.2 - http://hc.apache.org/httpcomponents-client)
+* Apache HttpCore (org.apache.httpcomponents:httpcore:4.4.4 - http://hc.apache.org/httpcomponents-core-ga)
+* Apache Log4j API (org.apache.logging.log4j:log4j-api:2.11.2 - https://logging.apache.org/log4j/2.x/log4j-api/)
+* Apache Log4j to SLF4J Adapter (org.apache.logging.log4j:log4j-to-slf4j:2.11.2 - https://logging.apache.org/log4j/2.x/log4j-to-slf4j/)
+* ASM based accessors helper used by json-smart (net.minidev:accessors-smart:1.2 - http://www.minidev.net/)
+* AssertJ fluent assertions (org.assertj:assertj-core:3.11.1 - http://assertj.org/assertj-core)
+* attoparser (org.attoparser:attoparser:2.0.5.RELEASE - http://www.attoparser.org)
+* Bean Validation API (javax.validation:validation-api:1.1.0.Final - http://beanvalidation.org)
+* Bean Validation API (javax.validation:validation-api:2.0.1.Final - http://beanvalidation.org)
+* Bootstrap (org.webjars:bootstrap:4.3.1 - http://webjars.org)
+* Byte Buddy (without dependencies) (net.bytebuddy:byte-buddy:1.9.3 - http://bytebuddy.net/byte-buddy)
+* Byte Buddy Java agent (net.bytebuddy:byte-buddy-agent:1.9.3 - http://bytebuddy.net/byte-buddy-agent)
+* ClassMate (com.fasterxml:classmate:1.3.4 - http://github.com/FasterXML/java-classmate)
+* Commons IO (commons-io:commons-io:2.4 - http://commons.apache.org/io/)
+* error-prone annotations (com.google.errorprone:error_prone_annotations:2.2.0 - http://nexus.sonatype.org/oss-repository-hosting.html/error_prone_parent/error_prone_annotations)
+* FindBugs-jsr305 (com.google.code.findbugs:jsr305:3.0.1 - http://findbugs.sourceforge.net/)
+* Guava: Google Core Libraries for Java (com.google.guava:guava:27.0.1-android - https://github.com/google/guava/guava)
+* Guava InternalFutureFailureAccess and InternalFutures (com.google.guava:failureaccess:1.0.1 - https://github.com/google/guava/failureaccess)
+* Guava ListenableFuture only (com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava - https://github.com/google/guava/listenablefuture)
+* Hibernate Validator Engine (org.hibernate.validator:hibernate-validator:6.0.16.Final - http://hibernate.org/validator/hibernate-validator)
+* J2ObjC Annotations (com.google.j2objc:j2objc-annotations:1.1 - https://github.com/google/j2objc/)
+* Jackson-annotations (com.fasterxml.jackson.core:jackson-annotations:2.9.0 - http://github.com/FasterXML/jackson)
+* Jackson-annotations (com.fasterxml.jackson.core:jackson-annotations:2.9.8 - http://github.com/FasterXML/jackson)
+* Jackson-core (com.fasterxml.jackson.core:jackson-core:2.9.8 - https://github.com/FasterXML/jackson-core)
+* jackson-databind (com.fasterxml.jackson.core:jackson-databind:2.9.8 - http://github.com/FasterXML/jackson)
+* Jackson-dataformat-YAML (com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.9.8 - https://github.com/FasterXML/jackson-dataformats-text)
+* Jackson datatype: jdk8 (com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.9.8 - https://github.com/FasterXML/jackson-modules-java8/jackson-datatype-jdk8)
+* Jackson datatype: JSR310 (com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.9.8 - https://github.com/FasterXML/jackson-modules-java8/jackson-datatype-jsr310)
+* Jackson-module-parameter-names (com.fasterxml.jackson.module:jackson-module-parameter-names:2.9.8 - https://github.com/FasterXML/jackson-modules-java8/jackson-module-parameter-names)
+* JBoss Logging 3 (org.jboss.logging:jboss-logging:3.3.2.Final - http://www.jboss.org)
+* Joda-Time (joda-time:joda-time:2.9.7 - http://www.joda.org/joda-time/)
+* JSONassert (org.skyscreamer:jsonassert:1.5.0 - https://github.com/skyscreamer/JSONassert)
+* JSON library from Android SDK (com.vaadin.external.google:android-json:0.0.20131108.vaadin1 - http://developer.android.com/sdk)
+* JSON Small and Fast Parser (net.minidev:json-smart:2.3 - http://www.minidev.net/)
+* libphonenumber (com.googlecode.libphonenumber:libphonenumber:8.0.0 - https://github.com/googlei18n/libphonenumber/)
+* micrometer-core (io.micrometer:micrometer-core:1.1.4 - https://github.com/micrometer-metrics/micrometer)
+* oas-validator-compatibility (org.apache.servicecomb.toolkit:oas-validator-compatibility:0.2.0-SNAPSHOT - no url defined)
+* oas-validator-compatibility-spring (org.apache.servicecomb.toolkit:oas-validator-compatibility-spring:0.2.0-SNAPSHOT - no url defined)
+* oas-validator-compliance (org.apache.servicecomb.toolkit:oas-validator-compliance:0.2.0-SNAPSHOT - no url defined)
+* oas-validator-compliance-spring (org.apache.servicecomb.toolkit:oas-validator-compliance-spring:0.2.0-SNAPSHOT - no url defined)
+* oas-validator-core (org.apache.servicecomb.toolkit:oas-validator-core:0.2.0-SNAPSHOT - no url defined)
+* oas-validator-core-spring (org.apache.servicecomb.toolkit:oas-validator-core-spring:0.2.0-SNAPSHOT - no url defined)
+* oas-validator-test (org.apache.servicecomb.toolkit:oas-validator-test:0.2.0-SNAPSHOT - no url defined)
+* Objenesis (org.objenesis:objenesis:2.6 - http://objenesis.org)
+* org.xmlunit:xmlunit-core (org.xmlunit:xmlunit-core:2.6.2 - https://www.xmlunit.org/)
+* project ':json-path' (com.jayway.jsonpath:json-path:2.4.0 - https://github.com/jayway/JsonPath)
+* SnakeYAML (org.yaml:snakeyaml:1.23 - http://www.snakeyaml.org)
+* Spring AOP (org.springframework:spring-aop:5.1.6.RELEASE - https://github.com/spring-projects/spring-framework)
+* Spring Beans (org.springframework:spring-beans:5.1.6.RELEASE - https://github.com/spring-projects/spring-framework)
+* Spring Boot (org.springframework.boot:spring-boot:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot)
+* Spring Boot Actuator (org.springframework.boot:spring-boot-actuator:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-actuator)
+* Spring Boot Actuator AutoConfigure (org.springframework.boot:spring-boot-actuator-autoconfigure:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-actuator-autoconfigure)
+* Spring Boot Actuator Starter (org.springframework.boot:spring-boot-starter-actuator:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-starters/spring-boot-starter-actuator)
+* Spring Boot AutoConfigure (org.springframework.boot:spring-boot-autoconfigure:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-autoconfigure)
+* Spring Boot Json Starter (org.springframework.boot:spring-boot-starter-json:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-starters/spring-boot-starter-json)
+* Spring Boot Logging Starter (org.springframework.boot:spring-boot-starter-logging:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-starters/spring-boot-starter-logging)
+* Spring Boot Starter (org.springframework.boot:spring-boot-starter:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-starters/spring-boot-starter)
+* Spring Boot Test (org.springframework.boot:spring-boot-test:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-test)
+* Spring Boot Test Auto-Configure (org.springframework.boot:spring-boot-test-autoconfigure:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-test-autoconfigure)
+* Spring Boot Test Starter (org.springframework.boot:spring-boot-starter-test:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-starters/spring-boot-starter-test)
+* Spring Boot Thymeleaf Starter (org.springframework.boot:spring-boot-starter-thymeleaf:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-starters/spring-boot-starter-thymeleaf)
+* Spring Boot Tomcat Starter (org.springframework.boot:spring-boot-starter-tomcat:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-starters/spring-boot-starter-tomcat)
+* Spring Boot Web Starter (org.springframework.boot:spring-boot-starter-web:2.1.4.RELEASE - https://projects.spring.io/spring-boot/#/spring-boot-parent/spring-boot-starters/spring-boot-starter-web)
+* Spring Commons Logging Bridge (org.springframework:spring-jcl:5.1.6.RELEASE - https://github.com/spring-projects/spring-framework)
+* Spring Context (org.springframework:spring-context:5.1.6.RELEASE - https://github.com/spring-projects/spring-framework)
+* Spring Core (org.springframework:spring-core:5.1.6.RELEASE - https://github.com/spring-projects/spring-framework)
+* Spring Expression Language (SpEL) (org.springframework:spring-expression:5.1.6.RELEASE - https://github.com/spring-projects/spring-framework)
+* Spring TestContext Framework (org.springframework:spring-test:5.1.6.RELEASE - https://github.com/spring-projects/spring-framework)
+* Spring Web (org.springframework:spring-web:5.1.6.RELEASE - https://github.com/spring-projects/spring-framework)
+* Spring Web MVC (org.springframework:spring-webmvc:5.1.6.RELEASE - https://github.com/spring-projects/spring-framework)
+* swagger-annotations (io.swagger:swagger-annotations:1.5.22 - https://github.com/swagger-api/swagger-core/modules/swagger-annotations)
+* swagger-annotations (io.swagger.core.v3:swagger-annotations:2.0.8 - https://github.com/swagger-api/swagger-core/modules/swagger-annotations)
+* swagger-compat-spec-parser (io.swagger:swagger-compat-spec-parser:1.0.44 - http://nexus.sonatype.org/oss-repository-hosting.html/swagger-parser-project/modules/swagger-compat-spec-parser)
+* swagger-core (io.swagger:swagger-core:1.5.22 - https://github.com/swagger-api/swagger-core/modules/swagger-core)
+* swagger-core (io.swagger.core.v3:swagger-core:2.0.8 - https://github.com/swagger-api/swagger-core/modules/swagger-core)
+* swagger-models (io.swagger:swagger-models:1.5.22 - https://github.com/swagger-api/swagger-core/modules/swagger-models)
+* swagger-models (io.swagger.core.v3:swagger-models:2.0.8 - https://github.com/swagger-api/swagger-core/modules/swagger-models)
+* swagger-parser (io.swagger:swagger-parser:1.0.44 - http://nexus.sonatype.org/oss-repository-hosting.html/swagger-parser-project/modules/swagger-parser)
+* swagger-parser (io.swagger.parser.v3:swagger-parser:2.0.12 - http://nexus.sonatype.org/oss-repository-hosting.html/swagger-parser-project/modules/swagger-parser)
+* swagger-parser (io.swagger.parser.v3:swagger-parser-core:2.0.12 - http://nexus.sonatype.org/oss-repository-hosting.html/swagger-parser-project/modules/swagger-parser-core)
+* swagger-parser-v2-converter (io.swagger.parser.v3:swagger-parser-v2-converter:2.0.12 - http://nexus.sonatype.org/oss-repository-hosting.html/swagger-parser-project/modules/swagger-parser-v2-converter)
+* swagger-parser-v3 (io.swagger.parser.v3:swagger-parser-v3:2.0.12 - http://nexus.sonatype.org/oss-repository-hosting.html/swagger-parser-project/modules/swagger-parser-v3)
+* thymeleaf (org.thymeleaf:thymeleaf:3.0.11.RELEASE - http://www.thymeleaf.org)
+* thymeleaf-extras-java8time (org.thymeleaf.extras:thymeleaf-extras-java8time:3.0.4.RELEASE - http://www.thymeleaf.org)
+* thymeleaf-spring5 (org.thymeleaf:thymeleaf-spring5:3.0.11.RELEASE - http://www.thymeleaf.org)
+* tomcat-embed-core (org.apache.tomcat.embed:tomcat-embed-core:9.0.17 - https://tomcat.apache.org/)
+* tomcat-embed-el (org.apache.tomcat.embed:tomcat-embed-el:9.0.17 - https://tomcat.apache.org/)
+* tomcat-embed-websocket (org.apache.tomcat.embed:tomcat-embed-websocket:9.0.17 - https://tomcat.apache.org/)
+* unbescape (org.unbescape:unbescape:1.1.6.RELEASE - http://www.unbescape.org)
+* json-schema-core (com.github.java-json-tools:json-schema-core:1.2.8 - https://github.com/java-json-tools/json-schema-core)
+* json-schema-validator (com.github.java-json-tools:json-schema-validator:2.2.8 - https://github.com/box-metadata/json-schema-validator)
+* com.github.fge:btf (com.github.fge:btf:1.2 - https://github.com/fge/btf)
+* com.github.fge:jackson-coreutils (com.github.fge:jackson-coreutils:1.6 - https://github.com/fge/jackson-coreutils)
+* com.github.fge:json-patch (com.github.fge:json-patch:1.6 - https://github.com/fge/json-patch)
+* com.github.fge:msg-simple (com.github.fge:msg-simple:1.1 - https://github.com/fge/msg-simple)
+* com.github.fge:uri-template (com.github.fge:uri-template:0.9 - https://github.com/fge/uri-template)
+
+===========================================================================
+This product bundles JavaBeans Activation Framework which are licensed under the
+COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) v1.0.
+For details, see http://java.sun.com/products/javabeans/jaf/index.jsp
+You can find a copy of the License at licenses/LICENSE-cddl-v10
+
+* JavaBeans Activation Framework (JAF) (javax.activation:activation:1.1 - http://java.sun.com/products/javabeans/jaf/index.jsp)
+
+===========================================================================
+This product bundles the following libraries which are licensed under the
+CDDL + GPLv2 with classpath exception.
+For details, see their respective project links.
+You can find a copy of the License at licenses/LICENSE-cddl-gplv2
+
+* javax.annotation API (javax.annotation:javax.annotation-api:1.3.2 - http://jcp.org/en/jsr/detail?id=250)
+* jaxb-api (javax.xml.bind:jaxb-api:2.3.0 - https://github.com/javaee/jaxb-spec/jaxb-api)
+* JavaMail API jar (javax.mail:mailapi:1.4.3 - http://java.sun.com/projects/javamail/mailapi)
+
+===========================================================================
+This product bundles Mozilla Rhino which is licensed under the
+Mozilla Public License, Version 2.0.
+For details, see https://developer.mozilla.org/en/Rhino
+You can find a copy of the License at licenses/LICENSE-mpl-v20
+
+* Mozilla Rhino (org.mozilla:rhino:1.7R4 - https://developer.mozilla.org/en/Rhino)
+
+===========================================================================
+This product bundles Webjars which is licensed under the
+MIT License.
+For details, see their respective project links.
+You can find a copy of the License at licenses/LICENSE-webjars
+
+* Popper.js (org.webjars:popper.js:1.14.3 - http://webjars.org)
+* jquery (org.webjars:jquery:3.0.0 - http://webjars.org)
+
+===========================================================================
+This product bundles Animal Sniffer Annotations which is licensed under the
+MIT License.
+For details, see http://www.mojohaus.org/animal-sniffer/animal-sniffer-annotations
+You can find a copy of the License at licenses/LICENSE-mit-unknown
+
+* Animal Sniffer Annotations (org.codehaus.mojo:animal-sniffer-annotations:1.17 - http://www.mojohaus.org/animal-sniffer/animal-sniffer-annotations)
+
+===========================================================================
+This product bundles Checker Qual which is licensed under the
+MIT License.
+For details, see https://checkerframework.org
+You can find a copy of the License at licenses/LICENSE-mit-unknown
+
+* Checker Qual (org.checkerframework:checker-compat-qual:2.5.2 - https://checkerframework.org)
+
+===========================================================================
+This product bundles Mockito which is licensed under the
+MIT License.
+For details, see https://github.com/mockito/mockito
+You can find a copy of the License at licenses/LICENSE-mockito
+
+* mockito-core (org.mockito:mockito-core:2.23.4 - https://github.com/mockito/mockito)
+
+===========================================================================
+This product bundles SLF4J which is licensed under the
+MIT License.
+For details, see http://www.slf4j.org
+You can find a copy of the License at licenses/LICENSE-slf4j
+
+* JUL to SLF4J bridge (org.slf4j:jul-to-slf4j:1.7.26 - http://www.slf4j.org)
+* SLF4J API Module (org.slf4j:slf4j-api:1.6.3 - http://www.slf4j.org)
+* SLF4J API Module (org.slf4j:slf4j-api:1.7.25 - http://www.slf4j.org)
+* SLF4J Extensions Module (org.slf4j:slf4j-ext:1.6.3 - http://www.slf4j.org)
+
+===========================================================================
+This product bundles Project Lombok which is licensed under the
+MIT License.
+For details, see https://projectlombok.org
+You can find a copy of the License at licenses/LICENSE-lombok
+
+* Project Lombok (org.projectlombok:lombok:1.18.6 - https://projectlombok.org)
+
+===========================================================================
+This product bundles JOpt Simple which is licensed under the
+MIT License.
+For details, see http://pholser.github.io/jopt-simple
+You can find a copy of the License at licenses/LICENSE-jopt
+
+* JOpt Simple (net.sf.jopt-simple:jopt-simple:5.0.3 - http://pholser.github.io/jopt-simple)
+
+===========================================================================
+This product bundles CAL10N which is licensed under the
+MIT License.
+For details, see http://cal10n.qos.ch/cal10n-api
+You can find a copy of the License at licenses/LICENSE-qos
+
+* Compiler assisted localization library (CAL10N) -    API (ch.qos.cal10n:cal10n-api:0.7.4 - http://cal10n.qos.ch/cal10n-api)
+
+===========================================================================
+This product bundles following libraries which is licensed under the
+Public Domain, per Creative Commons CC0.
+For details, see their respective project links.
+You can find a copy of the License at licenses/LICENSE-cc0
+
+* HdrHistogram (org.hdrhistogram:HdrHistogram:2.1.9 - http://hdrhistogram.github.io/HdrHistogram/)
+* LatencyUtils (org.latencyutils:LatencyUtils:2.0.3 - http://latencyutils.github.io/LatencyUtils/)
+
+===========================================================================
+This product bundles following libraries which is licensed under the
+Eclipse Public License v1.0.
+For details, see their respective project links.
+You can find a copy of the License at licenses/LICENSE-epl-v10
+
+* Logback Classic Module (ch.qos.logback:logback-classic:1.2.3 - http://logback.qos.ch/logback-classic)
+* Logback Core Module (ch.qos.logback:logback-core:1.2.3 - http://logback.qos.ch/logback-core)
+* JUnit (junit:junit:4.12 - http://junit.org)
+
+===========================================================================
+This product bundles Hamcrest which is licensed under the
+2-Clause BSD.
+For details, see https://github.com/hamcrest/JavaHamcrest
+You can find a copy of the License at licenses/LICENSE-hamcrest
+
+* Hamcrest Core (org.hamcrest:hamcrest-core:1.3 - https://github.com/hamcrest/JavaHamcrest/hamcrest-core)
+* Hamcrest library (org.hamcrest:hamcrest-library:1.3 - https://github.com/hamcrest/JavaHamcrest/hamcrest-library)
+
+===========================================================================
+This product bundles ASM Core which is licensed under the
+3-Clause BSD.
+For details, see http://asm.objectweb.org/asm/
+You can find a copy of the License at licenses/LICENSE-asm
+
+* ASM Core (org.ow2.asm:asm:5.0.4 - http://asm.objectweb.org/asm/)
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-asm b/oas-validator/distribution/src/release/licenses/LICENSE-asm
new file mode 100755
index 0000000..c71bb7b
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-asm
@@ -0,0 +1,27 @@
+ASM: a very small and fast Java bytecode manipulation framework
+Copyright (c) 2000-2011 INRIA, France Telecom
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in the
+  documentation and/or other materials provided with the distribution.
+3. Neither the name of the copyright holders nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-cc0 b/oas-validator/distribution/src/release/licenses/LICENSE-cc0
new file mode 100755
index 0000000..2dbc2c0
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-cc0
@@ -0,0 +1,27 @@
+CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED HEREUNDER.
+Statement of Purpose
+The laws of most jurisdictions throughout the world automatically confer exclusive Copyright and Related Rights (defined below) upon the creator and subsequent owner(s) (each and all, an "owner") of an original work of authorship and/or a database (each, a "Work").
+
+Certain owners wish to permanently relinquish those rights to a Work for the purpose of contributing to a commons of creative, cultural and scientific works ("Commons") that the public can reliably and without fear of later claims of infringement build upon, modify, incorporate in other works, reuse and redistribute as freely as possible in any form whatsoever and for any purposes, including without limitation commercial purposes. These owners may contribute to the Commons to promote the [...]
+
+For these and/or other purposes and motivations, and without any expectation of additional consideration or compensation, the person associating CC0 with a Work (the "Affirmer"), to the extent that he or she is an owner of Copyright and Related Rights in the Work, voluntarily elects to apply CC0 to the Work and publicly distribute the Work under its terms, with knowledge of his or her Copyright and Related Rights in the Work and the meaning and intended legal effect of CC0 on those rights.
+
+1. Copyright and Related Rights. A Work made available under CC0 may be protected by copyright and related or neighboring rights ("Copyright and Related Rights"). Copyright and Related Rights include, but are not limited to, the following:
+
+the right to reproduce, adapt, distribute, perform, display, communicate, and translate a Work;
+moral rights retained by the original author(s) and/or performer(s);
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+rights protecting the extraction, dissemination, use and reuse of data in a Work;
+database rights (such as those arising under Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, and under any national implementation thereof, including any amended or successor version of such directive); and
+other similar, equivalent or corresponding rights throughout the world based on applicable law or treaty, and any national implementations thereof.
+2. Waiver. To the greatest extent permitted by, but not in contravention of, applicable law, Affirmer hereby overtly, fully, permanently, irrevocably and unconditionally waives, abandons, and surrenders all of Affirmer's Copyright and Related Rights and associated claims and causes of action, whether now known or unknown (including existing as well as future claims and causes of action), in the Work (i) in all territories worldwide, (ii) for the maximum duration provided by applicable la [...]
+
+3. Public License Fallback. Should any part of the Waiver for any reason be judged legally invalid or ineffective under applicable law, then the Waiver shall be preserved to the maximum extent permitted taking into account Affirmer's express Statement of Purpose. In addition, to the extent the Waiver is so judged Affirmer hereby grants to each affected person a royalty-free, non transferable, non sublicensable, non exclusive, irrevocable and unconditional license to exercise Affirmer's C [...]
+
+4. Limitations and Disclaimers.
+
+No trademark or patent rights held by Affirmer are waived, abandoned, surrendered, licensed or otherwise affected by this document.
+Affirmer offers the Work as-is and makes no representations or warranties of any kind concerning the Work, express, implied, statutory or otherwise, including without limitation warranties of title, merchantability, fitness for a particular purpose, non infringement, or the absence of latent or other defects, accuracy, or the present or absence of errors, whether or not discoverable, all to the greatest extent permissible under applicable law.
+Affirmer disclaims responsibility for clearing rights of other persons that may apply to the Work or any use thereof, including without limitation any person's Copyright and Related Rights in the Work. Further, Affirmer disclaims responsibility for obtaining any necessary consents, permissions or other rights required for any use of the Work.
+Affirmer understands and acknowledges that Creative Commons is not a party to this document and has no duty or obligation with respect to this CC0 or use of the Work.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-cddl-gplv2 b/oas-validator/distribution/src/release/licenses/LICENSE-cddl-gplv2
new file mode 100755
index 0000000..4b156e6
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-cddl-gplv2
@@ -0,0 +1,760 @@
+COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.1
+
+1. Definitions.
+
+    1.1. "Contributor" means each individual or entity that creates or
+    contributes to the creation of Modifications.
+
+    1.2. "Contributor Version" means the combination of the Original
+    Software, prior Modifications used by a Contributor (if any), and
+    the Modifications made by that particular Contributor.
+
+    1.3. "Covered Software" means (a) the Original Software, or (b)
+    Modifications, or (c) the combination of files containing Original
+    Software with files containing Modifications, in each case including
+    portions thereof.
+
+    1.4. "Executable" means the Covered Software in any form other than
+    Source Code.
+
+    1.5. "Initial Developer" means the individual or entity that first
+    makes Original Software available under this License.
+
+    1.6. "Larger Work" means a work which combines Covered Software or
+    portions thereof with code not governed by the terms of this License.
+
+    1.7. "License" means this document.
+
+    1.8. "Licensable" means having the right to grant, to the maximum
+    extent possible, whether at the time of the initial grant or
+    subsequently acquired, any and all of the rights conveyed herein.
+
+    1.9. "Modifications" means the Source Code and Executable form of
+    any of the following:
+
+    A. Any file that results from an addition to, deletion from or
+    modification of the contents of a file containing Original Software
+    or previous Modifications;
+
+    B. Any new file that contains any part of the Original Software or
+    previous Modification; or
+
+    C. Any new file that is contributed or otherwise made available
+    under the terms of this License.
+
+    1.10. "Original Software" means the Source Code and Executable form
+    of computer software code that is originally released under this
+    License.
+
+    1.11. "Patent Claims" means any patent claim(s), now owned or
+    hereafter acquired, including without limitation, method, process,
+    and apparatus claims, in any patent Licensable by grantor.
+
+    1.12. "Source Code" means (a) the common form of computer software
+    code in which modifications are made and (b) associated
+    documentation included in or with such code.
+
+    1.13. "You" (or "Your") means an individual or a legal entity
+    exercising rights under, and complying with all of the terms of,
+    this License. For legal entities, "You" includes any entity which
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants.
+
+    2.1. The Initial Developer Grant.
+
+    Conditioned upon Your compliance with Section 3.1 below and subject
+    to third party intellectual property claims, the Initial Developer
+    hereby grants You a world-wide, royalty-free, non-exclusive license:
+
+    (a) under intellectual property rights (other than patent or
+    trademark) Licensable by Initial Developer, to use, reproduce,
+    modify, display, perform, sublicense and distribute the Original
+    Software (or portions thereof), with or without Modifications,
+    and/or as part of a Larger Work; and
+
+    (b) under Patent Claims infringed by the making, using or selling of
+    Original Software, to make, have made, use, practice, sell, and
+    offer for sale, and/or otherwise dispose of the Original Software
+    (or portions thereof).
+
+    (c) The licenses granted in Sections 2.1(a) and (b) are effective on
+    the date Initial Developer first distributes or otherwise makes the
+    Original Software available to a third party under the terms of this
+    License.
+
+    (d) Notwithstanding Section 2.1(b) above, no patent license is
+    granted: (1) for code that You delete from the Original Software, or
+    (2) for infringements caused by: (i) the modification of the
+    Original Software, or (ii) the combination of the Original Software
+    with other software or devices.
+
+    2.2. Contributor Grant.
+
+    Conditioned upon Your compliance with Section 3.1 below and subject
+    to third party intellectual property claims, each Contributor hereby
+    grants You a world-wide, royalty-free, non-exclusive license:
+
+    (a) under intellectual property rights (other than patent or
+    trademark) Licensable by Contributor to use, reproduce, modify,
+    display, perform, sublicense and distribute the Modifications
+    created by such Contributor (or portions thereof), either on an
+    unmodified basis, with other Modifications, as Covered Software
+    and/or as part of a Larger Work; and
+
+    (b) under Patent Claims infringed by the making, using, or selling
+    of Modifications made by that Contributor either alone and/or in
+    combination with its Contributor Version (or portions of such
+    combination), to make, use, sell, offer for sale, have made, and/or
+    otherwise dispose of: (1) Modifications made by that Contributor (or
+    portions thereof); and (2) the combination of Modifications made by
+    that Contributor with its Contributor Version (or portions of such
+    combination).
+
+    (c) The licenses granted in Sections 2.2(a) and 2.2(b) are effective
+    on the date Contributor first distributes or otherwise makes the
+    Modifications available to a third party.
+
+    (d) Notwithstanding Section 2.2(b) above, no patent license is
+    granted: (1) for any code that Contributor has deleted from the
+    Contributor Version; (2) for infringements caused by: (i) third
+    party modifications of Contributor Version, or (ii) the combination
+    of Modifications made by that Contributor with other software
+    (except as part of the Contributor Version) or other devices; or (3)
+    under Patent Claims infringed by Covered Software in the absence of
+    Modifications made by that Contributor.
+
+3. Distribution Obligations.
+
+    3.1. Availability of Source Code.
+
+    Any Covered Software that You distribute or otherwise make available
+    in Executable form must also be made available in Source Code form
+    and that Source Code form must be distributed only under the terms
+    of this License. You must include a copy of this License with every
+    copy of the Source Code form of the Covered Software You distribute
+    or otherwise make available. You must inform recipients of any such
+    Covered Software in Executable form as to how they can obtain such
+    Covered Software in Source Code form in a reasonable manner on or
+    through a medium customarily used for software exchange.
+
+    3.2. Modifications.
+
+    The Modifications that You create or to which You contribute are
+    governed by the terms of this License. You represent that You
+    believe Your Modifications are Your original creation(s) and/or You
+    have sufficient rights to grant the rights conveyed by this License.
+
+    3.3. Required Notices.
+
+    You must include a notice in each of Your Modifications that
+    identifies You as the Contributor of the Modification. You may not
+    remove or alter any copyright, patent or trademark notices contained
+    within the Covered Software, or any notices of licensing or any
+    descriptive text giving attribution to any Contributor or the
+    Initial Developer.
+
+    3.4. Application of Additional Terms.
+
+    You may not offer or impose any terms on any Covered Software in
+    Source Code form that alters or restricts the applicable version of
+    this License or the recipients' rights hereunder. You may choose to
+    offer, and to charge a fee for, warranty, support, indemnity or
+    liability obligations to one or more recipients of Covered Software.
+    However, you may do so only on Your own behalf, and not on behalf of
+    the Initial Developer or any Contributor. You must make it
+    absolutely clear that any such warranty, support, indemnity or
+    liability obligation is offered by You alone, and You hereby agree
+    to indemnify the Initial Developer and every Contributor for any
+    liability incurred by the Initial Developer or such Contributor as a
+    result of warranty, support, indemnity or liability terms You offer.
+
+    3.5. Distribution of Executable Versions.
+
+    You may distribute the Executable form of the Covered Software under
+    the terms of this License or under the terms of a license of Your
+    choice, which may contain terms different from this License,
+    provided that You are in compliance with the terms of this License
+    and that the license for the Executable form does not attempt to
+    limit or alter the recipient's rights in the Source Code form from
+    the rights set forth in this License. If You distribute the Covered
+    Software in Executable form under a different license, You must make
+    it absolutely clear that any terms which differ from this License
+    are offered by You alone, not by the Initial Developer or
+    Contributor. You hereby agree to indemnify the Initial Developer and
+    every Contributor for any liability incurred by the Initial
+    Developer or such Contributor as a result of any such terms You offer.
+
+    3.6. Larger Works.
+
+    You may create a Larger Work by combining Covered Software with
+    other code not governed by the terms of this License and distribute
+    the Larger Work as a single product. In such a case, You must make
+    sure the requirements of this License are fulfilled for the Covered
+    Software.
+
+4. Versions of the License.
+
+    4.1. New Versions.
+
+    Oracle is the initial license steward and may publish revised and/or
+    new versions of this License from time to time. Each version will be
+    given a distinguishing version number. Except as provided in Section
+    4.3, no one other than the license steward has the right to modify
+    this License.
+
+    4.2. Effect of New Versions.
+
+    You may always continue to use, distribute or otherwise make the
+    Covered Software available under the terms of the version of the
+    License under which You originally received the Covered Software. If
+    the Initial Developer includes a notice in the Original Software
+    prohibiting it from being distributed or otherwise made available
+    under any subsequent version of the License, You must distribute and
+    make the Covered Software available under the terms of the version
+    of the License under which You originally received the Covered
+    Software. Otherwise, You may also choose to use, distribute or
+    otherwise make the Covered Software available under the terms of any
+    subsequent version of the License published by the license steward.
+
+    4.3. Modified Versions.
+
+    When You are an Initial Developer and You want to create a new
+    license for Your Original Software, You may create and use a
+    modified version of this License if You: (a) rename the license and
+    remove any references to the name of the license steward (except to
+    note that the license differs from this License); and (b) otherwise
+    make it clear that the license contains terms which differ from this
+    License.
+
+5. DISCLAIMER OF WARRANTY.
+
+    COVERED SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS,
+    WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
+    INCLUDING, WITHOUT LIMITATION, WARRANTIES THAT THE COVERED SOFTWARE
+    IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE OR
+    NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF
+    THE COVERED SOFTWARE IS WITH YOU. SHOULD ANY COVERED SOFTWARE PROVE
+    DEFECTIVE IN ANY RESPECT, YOU (NOT THE INITIAL DEVELOPER OR ANY
+    OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY SERVICING,
+    REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN
+    ESSENTIAL PART OF THIS LICENSE. NO USE OF ANY COVERED SOFTWARE IS
+    AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
+
+6. TERMINATION.
+
+    6.1. This License and the rights granted hereunder will terminate
+    automatically if You fail to comply with terms herein and fail to
+    cure such breach within 30 days of becoming aware of the breach.
+    Provisions which, by their nature, must remain in effect beyond the
+    termination of this License shall survive.
+
+    6.2. If You assert a patent infringement claim (excluding
+    declaratory judgment actions) against Initial Developer or a
+    Contributor (the Initial Developer or Contributor against whom You
+    assert such claim is referred to as "Participant") alleging that the
+    Participant Software (meaning the Contributor Version where the
+    Participant is a Contributor or the Original Software where the
+    Participant is the Initial Developer) directly or indirectly
+    infringes any patent, then any and all rights granted directly or
+    indirectly to You by such Participant, the Initial Developer (if the
+    Initial Developer is not the Participant) and all Contributors under
+    Sections 2.1 and/or 2.2 of this License shall, upon 60 days notice
+    from Participant terminate prospectively and automatically at the
+    expiration of such 60 day notice period, unless if within such 60
+    day period You withdraw Your claim with respect to the Participant
+    Software against such Participant either unilaterally or pursuant to
+    a written agreement with Participant.
+
+    6.3. If You assert a patent infringement claim against Participant
+    alleging that the Participant Software directly or indirectly
+    infringes any patent where such claim is resolved (such as by
+    license or settlement) prior to the initiation of patent
+    infringement litigation, then the reasonable value of the licenses
+    granted by such Participant under Sections 2.1 or 2.2 shall be taken
+    into account in determining the amount or value of any payment or
+    license.
+
+    6.4. In the event of termination under Sections 6.1 or 6.2 above,
+    all end user licenses that have been validly granted by You or any
+    distributor hereunder prior to termination (excluding licenses
+    granted to You by any distributor) shall survive termination.
+
+7. LIMITATION OF LIABILITY.
+
+    UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, WHETHER TORT
+    (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL YOU, THE
+    INITIAL DEVELOPER, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF
+    COVERED SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE
+    TO ANY PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
+    CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT
+    LIMITATION, DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER
+    FAILURE OR MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR
+    LOSSES, EVEN IF SUCH PARTY SHALL HAVE BEEN INFORMED OF THE
+    POSSIBILITY OF SUCH DAMAGES. THIS LIMITATION OF LIABILITY SHALL NOT
+    APPLY TO LIABILITY FOR DEATH OR PERSONAL INJURY RESULTING FROM SUCH
+    PARTY'S NEGLIGENCE TO THE EXTENT APPLICABLE LAW PROHIBITS SUCH
+    LIMITATION. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR
+    LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THIS EXCLUSION
+    AND LIMITATION MAY NOT APPLY TO YOU.
+
+8. U.S. GOVERNMENT END USERS.
+
+    The Covered Software is a "commercial item," as that term is defined
+    in 48 C.F.R. 2.101 (Oct. 1995), consisting of "commercial computer
+    software" (as that term is defined at 48 C.F.R. §
+    252.227-7014(a)(1)) and "commercial computer software documentation"
+    as such terms are used in 48 C.F.R. 12.212 (Sept. 1995). Consistent
+    with 48 C.F.R. 12.212 and 48 C.F.R. 227.7202-1 through 227.7202-4
+    (June 1995), all U.S. Government End Users acquire Covered Software
+    with only those rights set forth herein. This U.S. Government Rights
+    clause is in lieu of, and supersedes, any other FAR, DFAR, or other
+    clause or provision that addresses Government rights in computer
+    software under this License.
+
+9. MISCELLANEOUS.
+
+    This License represents the complete agreement concerning subject
+    matter hereof. If any provision of this License is held to be
+    unenforceable, such provision shall be reformed only to the extent
+    necessary to make it enforceable. This License shall be governed by
+    the law of the jurisdiction specified in a notice contained within
+    the Original Software (except to the extent applicable law, if any,
+    provides otherwise), excluding such jurisdiction's conflict-of-law
+    provisions. Any litigation relating to this License shall be subject
+    to the jurisdiction of the courts located in the jurisdiction and
+    venue specified in a notice contained within the Original Software,
+    with the losing party responsible for costs, including, without
+    limitation, court costs and reasonable attorneys' fees and expenses.
+    The application of the United Nations Convention on Contracts for
+    the International Sale of Goods is expressly excluded. Any law or
+    regulation which provides that the language of a contract shall be
+    construed against the drafter shall not apply to this License. You
+    agree that You alone are responsible for compliance with the United
+    States export administration regulations (and the export control
+    laws and regulation of any other countries) when You use, distribute
+    or otherwise make available any Covered Software.
+
+10. RESPONSIBILITY FOR CLAIMS.
+
+    As between Initial Developer and the Contributors, each party is
+    responsible for claims and damages arising, directly or indirectly,
+    out of its utilization of rights under this License and You agree to
+    work with Initial Developer and Contributors to distribute such
+    responsibility on an equitable basis. Nothing herein is intended or
+    shall be deemed to constitute any admission of liability.
+
+------------------------------------------------------------------------
+
+NOTICE PURSUANT TO SECTION 9 OF THE COMMON DEVELOPMENT AND DISTRIBUTION
+LICENSE (CDDL)
+
+The code released under the CDDL shall be governed by the laws of the
+State of California (excluding conflict-of-law provisions). Any
+litigation relating to this License shall be subject to the jurisdiction
+of the Federal Courts of the Northern District of California and the
+state courts of the State of California, with venue lying in Santa Clara
+County, California.
+
+
+
+  The GNU General Public License (GPL) Version 2, June 1991
+
+Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor
+Boston, MA 02110-1335
+USA
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+
+Preamble
+
+The licenses for most software are designed to take away your freedom to
+share and change it. By contrast, the GNU General Public License is
+intended to guarantee your freedom to share and change free software--to
+make sure the software is free for all its users. This General Public
+License applies to most of the Free Software Foundation's software and
+to any other program whose authors commit to using it. (Some other Free
+Software Foundation software is covered by the GNU Library General
+Public License instead.) You can apply it to your programs, too.
+
+When we speak of free software, we are referring to freedom, not price.
+Our General Public Licenses are designed to make sure that you have the
+freedom to distribute copies of free software (and charge for this
+service if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs; and that you know you can do these things.
+
+To protect your rights, we need to make restrictions that forbid anyone
+to deny you these rights or to ask you to surrender the rights. These
+restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+For example, if you distribute copies of such a program, whether gratis
+or for a fee, you must give the recipients all the rights that you have.
+You must make sure that they, too, receive or can get the source code.
+And you must show them these terms so they know their rights.
+
+We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+Finally, any free program is threatened constantly by software patents.
+We wish to avoid the danger that redistributors of a free program will
+individually obtain patent licenses, in effect making the program
+proprietary. To prevent this, we have made it clear that any patent must
+be licensed for everyone's free use or not licensed at all.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+0. This License applies to any program or other work which contains a
+notice placed by the copyright holder saying it may be distributed under
+the terms of this General Public License. The "Program", below, refers
+to any such program or work, and a "work based on the Program" means
+either the Program or any derivative work under copyright law: that is
+to say, a work containing the Program or a portion of it, either
+verbatim or with modifications and/or translated into another language.
+(Hereinafter, translation is included without limitation in the term
+"modification".) Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of running
+the Program is not restricted, and the output from the Program is
+covered only if its contents constitute a work based on the Program
+(independent of having been made by running the Program). Whether that
+is true depends on what the Program does.
+
+1. You may copy and distribute verbatim copies of the Program's source
+code as you receive it, in any medium, provided that you conspicuously
+and appropriately publish on each copy an appropriate copyright notice
+and disclaimer of warranty; keep intact all the notices that refer to
+this License and to the absence of any warranty; and give any other
+recipients of the Program a copy of this License along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+2. You may modify your copy or copies of the Program or any portion of
+it, thus forming a work based on the Program, and copy and distribute
+such modifications or work under the terms of Section 1 above, provided
+that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any part
+    thereof, to be licensed as a whole at no charge to all third parties
+    under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a notice
+    that there is no warranty (or else, saying that you provide a
+    warranty) and that users may redistribute the program under these
+    conditions, and telling the user how to view a copy of this License.
+    (Exception: if the Program itself is interactive but does not
+    normally print such an announcement, your work based on the Program
+    is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program, and
+can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based on
+the Program, the distribution of the whole must be on the terms of this
+License, whose permissions for other licensees extend to the entire
+whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of a
+storage or distribution medium does not bring the other work under the
+scope of this License.
+
+3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections 1
+    and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your cost
+    of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer to
+    distribute corresponding source code. (This alternative is allowed
+    only for noncommercial distribution and only if you received the
+    program in object code or executable form with such an offer, in
+    accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it. For an executable work, complete source code
+means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to control
+compilation and installation of the executable. However, as a special
+exception, the source code distributed need not include anything that is
+normally distributed (in either source or binary form) with the major
+components (compiler, kernel, and so on) of the operating system on
+which the executable runs, unless that component itself accompanies the
+executable.
+
+If distribution of executable or object code is made by offering access
+to copy from a designated place, then offering equivalent access to copy
+the source code from the same place counts as distribution of the source
+code, even though third parties are not compelled to copy the source
+along with the object code.
+
+4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License. Any attempt otherwise
+to copy, modify, sublicense or distribute the Program is void, and will
+automatically terminate your rights under this License. However, parties
+who have received copies, or rights, from you under this License will
+not have their licenses terminated so long as such parties remain in
+full compliance.
+
+5. You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Program or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and all
+its terms and conditions for copying, distributing or modifying the
+Program or works based on it.
+
+6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions. You may not impose any further restrictions
+on the recipients' exercise of the rights granted herein. You are not
+responsible for enforcing compliance by third parties to this License.
+
+7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot distribute
+so as to satisfy simultaneously your obligations under this License and
+any other pertinent obligations, then as a consequence you may not
+distribute the Program at all. For example, if a patent license would
+not permit royalty-free redistribution of the Program by all those who
+receive copies directly or indirectly through you, then the only way you
+could satisfy both it and this License would be to refrain entirely from
+distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is implemented
+by public license practices. Many people have made generous
+contributions to the wide range of software distributed through that
+system in reliance on consistent application of that system; it is up to
+the author/donor to decide if he or she is willing to distribute
+software through any other system and a licensee cannot impose that choice.
+
+This section is intended to make thoroughly clear what is believed to be
+a consequence of the rest of this License.
+
+8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License may
+add an explicit geographical distribution limitation excluding those
+countries, so that distribution is permitted only in or among countries
+not thus excluded. In such case, this License incorporates the
+limitation as if written in the body of this License.
+
+9. The Free Software Foundation may publish revised and/or new
+versions of the General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and
+conditions either of that version or of any later version published by
+the Free Software Foundation. If the Program does not specify a version
+number of this License, you may choose any version ever published by the
+Free Software Foundation.
+
+10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the
+author to ask for permission. For software which is copyrighted by the
+Free Software Foundation, write to the Free Software Foundation; we
+sometimes make exceptions for this. Our decision will be guided by the
+two goals of preserving the free status of all derivatives of our free
+software and of promoting the sharing and reuse of software generally.
+
+NO WARRANTY
+
+11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND,
+EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
+ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH
+YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
+NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
+DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
+DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM
+(INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
+INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF
+THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR
+OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively convey
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+    One line to give the program's name and a brief idea of what it does.
+    Copyright (C) <year> <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type
+    `show w'. This is free software, and you are welcome to redistribute
+    it under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the
+appropriate parts of the General Public License. Of course, the commands
+you use may be called something other than `show w' and `show c'; they
+could even be mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+    Yoyodyne, Inc., hereby disclaims all copyright interest in the
+    program `Gnomovision' (which makes passes at compilers) written by
+    James Hacker.
+
+    signature of Ty Coon, 1 April 1989
+    Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications
+with the library. If this is what you want to do, use the GNU Library
+General Public License instead of this License.
+
+#
+
+Certain source files distributed by Oracle America, Inc. and/or its
+affiliates are subject to the following clarification and special
+exception to the GPLv2, based on the GNU Project exception for its
+Classpath libraries, known as the GNU Classpath Exception, but only
+where Oracle has expressly included in the particular source file's
+header the words "Oracle designates this particular file as subject to
+the "Classpath" exception as provided by Oracle in the LICENSE file
+that accompanied this code."
+
+You should also note that Oracle includes multiple, independent
+programs in this software package. Some of those programs are provided
+under licenses deemed incompatible with the GPLv2 by the Free Software
+Foundation and others.  For example, the package includes programs
+licensed under the Apache License, Version 2.0.  Such programs are
+licensed to you under their original licenses.
+
+Oracle facilitates your further distribution of this package by adding
+the Classpath Exception to the necessary parts of its GPLv2 code, which
+permits you to use that code in combination with other independent
+modules not licensed under the GPLv2.  However, note that this would
+not permit you to commingle code under an incompatible license with
+Oracle's GPLv2 licensed code by, for example, cutting and pasting such
+code into a file also containing Oracle's GPLv2 licensed code and then
+distributing the result.  Additionally, if you were to remove the
+Classpath Exception from any of the files to which it applies and
+distribute the result, you would likely be required to license some or
+all of the other code in that distribution under the GPLv2 as well, and
+since the GPLv2 is incompatible with the license terms of some items
+included in the distribution by Oracle, removing the Classpath
+Exception could therefore effectively compromise your ability to
+further distribute the package.
+
+Proceed with caution and we recommend that you obtain the advice of a
+lawyer skilled in open source matters before removing the Classpath
+Exception or making modifications to this package which may
+subsequently be redistributed and/or involve the use of third party
+software.
+
+CLASSPATH EXCEPTION
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License version 2 cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from or
+based on this library.  If you modify this library, you may extend this
+exception to your version of the library, but you are not obligated to
+do so.  If you do not wish to do so, delete this exception statement
+from your version.
+
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-cddl-v10 b/oas-validator/distribution/src/release/licenses/LICENSE-cddl-v10
new file mode 100755
index 0000000..46164de
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-cddl-v10
@@ -0,0 +1,132 @@
+COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
+
+1. Definitions.
+
+1.1. "Contributor" means each individual or entity that creates or contributes to the creation of Modifications.
+
+1.2. "Contributor Version" means the combination of the Original Software, prior Modifications used by a Contributor (if any), and the Modifications made by that particular Contributor.
+
+1.3. "Covered Software" means (a) the Original Software, or (b) Modifications, or (c) the combination of files containing Original Software with files containing Modifications, in each case including portions thereof.
+
+1.4. "Executable" means the Covered Software in any form other than Source Code.
+
+1.5. "Initial Developer" means the individual or entity that first makes Original Software available under this License.
+
+1.6. "Larger Work" means a work which combines Covered Software or portions thereof with code not governed by the terms of this License.
+
+1.7. "License" means this document.
+
+1.8. "Licensable" means having the right to grant, to the maximum extent possible, whether at the time of the initial grant or subsequently acquired, any and all of the rights conveyed herein.
+
+1.9. "Modifications" means the Source Code and Executable form of any of the following:
+
+A. Any file that results from an addition to, deletion from or modification of the contents of a file containing Original Software or previous Modifications;
+
+B. Any new file that contains any part of the Original Software or previous Modification; or
+
+C. Any new file that is contributed or otherwise made available under the terms of this License.
+
+1.10. "Original Software" means the Source Code and Executable form of computer software code that is originally released under this License.
+
+1.11. "Patent Claims" means any patent claim(s), now owned or hereafter acquired, including without limitation, method, process, and apparatus claims, in any patent Licensable by grantor.
+
+1.12. "Source Code" means (a) the common form of computer software code in which modifications are made and (b) associated documentation included in or with such code.
+
+1.13. "You" (or "Your") means an individual or a legal entity exercising rights under, and complying with all of the terms of, this License. For legal entities, "You" includes any entity which controls, is controlled by, or is under common control with You. For purposes of this definition, "control" means (a) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (b) ownership of more than fifty percent (50%) of the outsta [...]
+
+2. License Grants.
+
+2.1. The Initial Developer Grant.
+
+Conditioned upon Your compliance with Section 3.1 below and subject to third party intellectual property claims, the Initial Developer hereby grants You a world-wide, royalty-free, non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark) Licensable by Initial Developer, to use, reproduce, modify, display, perform, sublicense and distribute the Original Software (or portions thereof), with or without Modifications, and/or as part of a Larger Work; and
+
+(b) under Patent Claims infringed by the making, using or selling of Original Software, to make, have made, use, practice, sell, and offer for sale, and/or otherwise dispose of the Original Software (or portions thereof).
+
+(c) The licenses granted in Sections 2.1(a) and (b) are effective on the date Initial Developer first distributes or otherwise makes the Original Software available to a third party under the terms of this License.
+
+(d) Notwithstanding Section 2.1(b) above, no patent license is granted: (1) for code that You delete from the Original Software, or (2) for infringements caused by: (i) the modification of the Original Software, or (ii) the combination of the Original Software with other software or devices.
+
+2.2. Contributor Grant.
+
+Conditioned upon Your compliance with Section 3.1 below and
+subject to third party intellectual property claims, each
+Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark) Licensable by Contributor to use, reproduce, modify, display, perform, sublicense and distribute the Modifications created by such Contributor (or portions thereof), either on an unmodified basis, with other Modifications, as Covered Software and/or as part of a Larger Work; and
+
+(b) under Patent Claims infringed by the making, using, or selling of Modifications made by that Contributor either alone and/or in combination with its Contributor Version (or portions of such combination), to make, use, sell, offer for sale, have made, and/or otherwise dispose of: (1) Modifications made by that Contributor (or portions thereof); and (2) the combination of Modifications made by that Contributor with its Contributor Version (or portions of such combination).
+
+(c) The licenses granted in Sections 2.2(a) and 2.2(b) are effective on the date Contributor first distributes or otherwise makes the Modifications available to a third party.
+(d) Notwithstanding Section 2.2(b) above, no patent license is granted: (1) for any code that Contributor has deleted from the Contributor Version; (2) for infringements caused by: (i) third party modifications of Contributor Version, or (ii) the combination of Modifications made by that Contributor with other software (except as part of the Contributor Version) or other devices; or (3) under Patent Claims infringed by Covered Software in the absence of Modifications made by that Contributor.
+
+3. Distribution Obligations.
+
+3.1. Availability of Source Code.
+
+Any Covered Software that You distribute or otherwise make available in Executable form must also be made available in Source Code form and that Source Code form must be distributed only under the terms of this License. You must include a copy of this License with every copy of the Source Code form of the Covered Software You distribute or otherwise make available. You must inform recipients of any such Covered Software in Executable form as to how they can obtain such Covered Software i [...]
+
+3.2. Modifications.
+
+The Modifications that You create or to which You contribute are governed by the terms of this License. You represent that You believe Your Modifications are Your original creation(s) and/or You have sufficient rights to grant the rights conveyed by this License.
+
+3.3. Required Notices.
+
+You must include a notice in each of Your Modifications that identifies You as the Contributor of the Modification. You may not remove or alter any copyright, patent or trademark notices contained within the Covered Software, or any notices of licensing or any descriptive text giving attribution to any Contributor or the Initial Developer.
+
+3.4. Application of Additional Terms.
+
+You may not offer or impose any terms on any Covered Software in Source Code form that alters or restricts the applicable version of this License or the recipients' rights hereunder. You may choose to offer, and to charge a fee for, warranty, support, indemnity or liability obligations to one or more recipients of Covered Software. However, you may do so only on Your own behalf, and not on behalf of the Initial Developer or any Contributor. You must make it absolutely clear that any such [...]
+
+3.5. Distribution of Executable Versions.
+
+You may distribute the Executable form of the Covered Software under the terms of this License or under the terms of a license of Your choice, which may contain terms different from this License, provided that You are in compliance with the terms of this License and that the license for the Executable form does not attempt to limit or alter the recipient's rights in the Source Code form from the rights set forth in this License. If You distribute the Covered Software in Executable form u [...]
+
+3.6. Larger Works.
+
+You may create a Larger Work by combining Covered Software with other code not governed by the terms of this License and distribute the Larger Work as a single product. In such a case, You must make sure the requirements of this License are fulfilled for the Covered Software.
+
+4. Versions of the License.
+
+4.1. New Versions.
+
+Sun Microsystems, Inc. is the initial license steward and may publish revised and/or new versions of this License from time to time. Each version will be given a distinguishing version number. Except as provided in Section 4.3, no one other than the license steward has the right to modify this License.
+
+4.2. Effect of New Versions.
+
+You may always continue to use, distribute or otherwise make the Covered Software available under the terms of the version of the License under which You originally received the Covered Software. If the Initial Developer includes a notice in the Original Software prohibiting it from being distributed or otherwise made available under any subsequent version of the License, You must distribute and make the Covered Software available under the terms of the version of the License under which [...]
+
+4.3. Modified Versions.
+
+When You are an Initial Developer and You want to create a new license for Your Original Software, You may create and use a modified version of this License if You: (a) rename the license and remove any references to the name of the license steward (except to note that the license differs from this License); and (b) otherwise make it clear that the license contains terms which differ from this License.
+
+5. DISCLAIMER OF WARRANTY.
+
+COVERED SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES THAT THE COVERED SOFTWARE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED SOFTWARE IS WITH YOU. SHOULD ANY COVERED SOFTWARE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE [...]
+
+6. TERMINATION.
+
+6.1. This License and the rights granted hereunder will terminate automatically if You fail to comply with terms herein and fail to cure such breach within 30 days of becoming aware of the breach. Provisions which, by their nature, must remain in effect beyond the termination of this License shall survive.
+
+6.2. If You assert a patent infringement claim (excluding declaratory judgment actions) against Initial Developer or a Contributor (the Initial Developer or Contributor against whom You assert such claim is referred to as "Participant") alleging that the Participant Software (meaning the Contributor Version where the Participant is a Contributor or the Original Software where the Participant is the Initial Developer) directly or indirectly infringes any patent, then any and all rights gr [...]
+
+6.3. In the event of termination under Sections 6.1 or 6.2 above, all end user licenses that have been validly granted by You or any distributor hereunder prior to termination (excluding licenses granted to You by any distributor) shall survive termination.
+
+7. LIMITATION OF LIABILITY.
+
+UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL YOU, THE INITIAL DEVELOPER, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF COVERED SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO ANY PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOST PROFITS, LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR MALFUNCTION, OR ANY AND ALL O [...]
+
+8. U.S. GOVERNMENT END USERS.
+
+The Covered Software is a "commercial item," as that term is defined in 48 C.F.R. 2.101 (Oct. 1995), consisting of "commercial computer software" (as that term is defined at 48 C.F.R. ¤ 252.227-7014(a)(1)) and "commercial computer software documentation" as such terms are used in 48 C.F.R. 12.212 (Sept. 1995). Consistent with 48 C.F.R. 12.212 and 48 C.F.R. 227.7202-1 through 227.7202-4 (June 1995), all U.S. Government End Users acquire Covered Software with only those rights set forth he [...]
+
+9. MISCELLANEOUS.
+
+This License represents the complete agreement concerning subject matter hereof. If any provision of this License is held to be unenforceable, such provision shall be reformed only to the extent necessary to make it enforceable. This License shall be governed by the law of the jurisdiction specified in a notice contained within the Original Software (except to the extent applicable law, if any, provides otherwise), excluding such jurisdiction's conflict-of-law provisions. Any litigation  [...]
+
+10. RESPONSIBILITY FOR CLAIMS.
+
+As between Initial Developer and the Contributors, each party is responsible for claims and damages arising, directly or indirectly, out of its utilization of rights under this License and You agree to work with Initial Developer and Contributors to distribute such responsibility on an equitable basis. Nothing herein is intended or shall be deemed to constitute any admission of liability.
+
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-epl-v10 b/oas-validator/distribution/src/release/licenses/LICENSE-epl-v10
new file mode 100755
index 0000000..b0476ee
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-epl-v10
@@ -0,0 +1,86 @@
+Eclipse Public License - v 1.0
+THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
+
+1. DEFINITIONS
+
+"Contribution" means:
+
+a) in the case of the initial Contributor, the initial code and documentation distributed under this Agreement, and
+
+b) in the case of each subsequent Contributor:
+
+i) changes to the Program, and
+
+ii) additions to the Program;
+
+where such changes and/or additions to the Program originate from and are distributed by that particular Contributor. A Contribution 'originates' from a Contributor if it was added to the Program by such Contributor itself or anyone acting on such Contributor's behalf. Contributions do not include additions to the Program which: (i) are separate modules of software distributed in conjunction with the Program under their own license agreement, and (ii) are not derivative works of the Program.
+
+"Contributor" means any person or entity that distributes the Program.
+
+"Licensed Patents" mean patent claims licensable by a Contributor which are necessarily infringed by the use or sale of its Contribution alone or when combined with the Program.
+
+"Program" means the Contributions distributed in accordance with this Agreement.
+
+"Recipient" means anyone who receives the Program under this Agreement, including all Contributors.
+
+2. GRANT OF RIGHTS
+
+a) Subject to the terms of this Agreement, each Contributor hereby grants Recipient a non-exclusive, worldwide, royalty-free copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, distribute and sublicense the Contribution of such Contributor, if any, and such derivative works, in source code and object code form.
+
+b) Subject to the terms of this Agreement, each Contributor hereby grants Recipient a non-exclusive, worldwide, royalty-free patent license under Licensed Patents to make, use, sell, offer to sell, import and otherwise transfer the Contribution of such Contributor, if any, in source code and object code form. This patent license shall apply to the combination of the Contribution and the Program if, at the time the Contribution is added by the Contributor, such addition of the Contributio [...]
+
+c) Recipient understands that although each Contributor grants the licenses to its Contributions set forth herein, no assurances are provided by any Contributor that the Program does not infringe the patent or other intellectual property rights of any other entity. Each Contributor disclaims any liability to Recipient for claims brought by any other entity based on infringement of intellectual property rights or otherwise. As a condition to exercising the rights and licenses granted here [...]
+
+d) Each Contributor represents that to its knowledge it has sufficient copyright rights in its Contribution, if any, to grant the copyright license set forth in this Agreement.
+
+3. REQUIREMENTS
+
+A Contributor may choose to distribute the Program in object code form under its own license agreement, provided that:
+
+a) it complies with the terms and conditions of this Agreement; and
+
+b) its license agreement:
+
+i) effectively disclaims on behalf of all Contributors all warranties and conditions, express and implied, including warranties or conditions of title and non-infringement, and implied warranties or conditions of merchantability and fitness for a particular purpose;
+
+ii) effectively excludes on behalf of all Contributors all liability for damages, including direct, indirect, special, incidental and consequential damages, such as lost profits;
+
+iii) states that any provisions which differ from this Agreement are offered by that Contributor alone and not by any other party; and
+
+iv) states that source code for the Program is available from such Contributor, and informs licensees how to obtain it in a reasonable manner on or through a medium customarily used for software exchange.
+
+When the Program is made available in source code form:
+
+a) it must be made available under this Agreement; and
+
+b) a copy of this Agreement must be included with each copy of the Program.
+
+Contributors may not remove or alter any copyright notices contained within the Program.
+
+Each Contributor must identify itself as the originator of its Contribution, if any, in a manner that reasonably allows subsequent Recipients to identify the originator of the Contribution.
+
+4. COMMERCIAL DISTRIBUTION
+
+Commercial distributors of software may accept certain responsibilities with respect to end users, business partners and the like. While this license is intended to facilitate the commercial use of the Program, the Contributor who includes the Program in a commercial product offering should do so in a manner which does not create potential liability for other Contributors. Therefore, if a Contributor includes the Program in a commercial product offering, such Contributor ("Commercial Con [...]
+
+For example, a Contributor might include the Program in a commercial product offering, Product X. That Contributor is then a Commercial Contributor. If that Commercial Contributor then makes performance claims, or offers warranties related to Product X, those performance claims and warranties are such Commercial Contributor's responsibility alone. Under this section, the Commercial Contributor would have to defend claims against the other Contributors related to those performance claims  [...]
+
+5. NO WARRANTY
+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is solely responsible for determining the appropriateness of using and distributing the Program and assumes all risks associated with its exercise of rights under this Ag [...]
+
+6. DISCLAIMER OF LIABILITY
+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED HEREUNDER, EVEN IF [...]
+
+7. GENERAL
+
+If any provision of this Agreement is invalid or unenforceable under applicable law, it shall not affect the validity or enforceability of the remainder of the terms of this Agreement, and without further action by the parties hereto, such provision shall be reformed to the minimum extent necessary to make such provision valid and enforceable.
+
+If Recipient institutes patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Program itself (excluding combinations of the Program with other software or hardware) infringes such Recipient's patent(s), then such Recipient's rights granted under Section 2(b) shall terminate as of the date such litigation is filed.
+
+All Recipient's rights under this Agreement shall terminate if it fails to comply with any of the material terms or conditions of this Agreement and does not cure such failure in a reasonable period of time after becoming aware of such noncompliance. If all Recipient's rights under this Agreement terminate, Recipient agrees to cease use and distribution of the Program as soon as reasonably practicable. However, Recipient's obligations under this Agreement and any licenses granted by Reci [...]
+
+Everyone is permitted to copy and distribute copies of this Agreement, but in order to avoid inconsistency the Agreement is copyrighted and may only be modified in the following manner. The Agreement Steward reserves the right to publish new versions (including revisions) of this Agreement from time to time. No one other than the Agreement Steward has the right to modify this Agreement. The Eclipse Foundation is the initial Agreement Steward. The Eclipse Foundation may assign the respons [...]
+
+This Agreement is governed by the laws of the State of New York and the intellectual property laws of the United States of America. No party to this Agreement will bring a legal action under this Agreement more than one year after the cause of action arose. Each party waives its rights to a jury trial in any resulting litigation.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-hamcrest b/oas-validator/distribution/src/release/licenses/LICENSE-hamcrest
new file mode 100755
index 0000000..dcdcc42
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-hamcrest
@@ -0,0 +1,27 @@
+BSD License
+
+Copyright (c) 2000-2006, www.hamcrest.org
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+Redistributions of source code must retain the above copyright notice, this list of
+conditions and the following disclaimer. Redistributions in binary form must reproduce
+the above copyright notice, this list of conditions and the following disclaimer in
+the documentation and/or other materials provided with the distribution.
+
+Neither the name of Hamcrest nor the names of its contributors may be used to endorse
+or promote products derived from this software without specific prior written
+permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGE.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-jopt b/oas-validator/distribution/src/release/licenses/LICENSE-jopt
new file mode 100755
index 0000000..7cb505b
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-jopt
@@ -0,0 +1,22 @@
+The MIT License
+
+Copyright (c) 2004-2016 Paul R. Holser, Jr.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-lombok b/oas-validator/distribution/src/release/licenses/LICENSE-lombok
new file mode 100755
index 0000000..5da7dbe
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-lombok
@@ -0,0 +1,19 @@
+Copyright (C) 2009-2015 The Project Lombok Authors.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-mit b/oas-validator/distribution/src/release/licenses/LICENSE-mit
new file mode 100755
index 0000000..244229e
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-mit
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-mockito b/oas-validator/distribution/src/release/licenses/LICENSE-mockito
new file mode 100755
index 0000000..5a311f7
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-mockito
@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) 2007 Mockito contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-mpl-v20 b/oas-validator/distribution/src/release/licenses/LICENSE-mpl-v20
new file mode 100755
index 0000000..14e2f77
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-mpl-v20
@@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in 
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-qos b/oas-validator/distribution/src/release/licenses/LICENSE-qos
new file mode 100755
index 0000000..0c40879
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-qos
@@ -0,0 +1,21 @@
+Copyright (c) 2009 QOS.ch
+All rights reserved.
+
+Permission is hereby granted, free  of charge, to any person obtaining
+a  copy  of this  software  and  associated  documentation files  (the
+"Software"), to  deal in  the Software without  restriction, including
+without limitation  the rights to  use, copy, modify,  merge, publish,
+distribute,  sublicense, and/or sell  copies of  the Software,  and to
+permit persons to whom the Software  is furnished to do so, subject to
+the following conditions:
+
+The  above  copyright  notice  and  this permission  notice  shall  be
+included in all copies or substantial portions of the Software.
+
+THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
+EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
+MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-slf4j b/oas-validator/distribution/src/release/licenses/LICENSE-slf4j
new file mode 100755
index 0000000..744377c
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-slf4j
@@ -0,0 +1,21 @@
+Copyright (c) 2004-2017 QOS.ch
+All rights reserved.
+
+Permission is hereby granted, free  of charge, to any person obtaining
+a  copy  of this  software  and  associated  documentation files  (the
+"Software"), to  deal in  the Software without  restriction, including
+without limitation  the rights to  use, copy, modify,  merge, publish,
+distribute,  sublicense, and/or sell  copies of  the Software,  and to
+permit persons to whom the Software  is furnished to do so, subject to
+the following conditions:
+
+The  above  copyright  notice  and  this permission  notice  shall  be
+included in all copies or substantial portions of the Software.
+
+THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
+EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
+MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/oas-validator/distribution/src/release/licenses/LICENSE-webjars b/oas-validator/distribution/src/release/licenses/LICENSE-webjars
new file mode 100755
index 0000000..29bdee3
--- /dev/null
+++ b/oas-validator/distribution/src/release/licenses/LICENSE-webjars
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 James Ward
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/oas-validator/doc/INSTALLATION.MD b/oas-validator/doc/INSTALLATION.MD
new file mode 100755
index 0000000..6dc6849
--- /dev/null
+++ b/oas-validator/doc/INSTALLATION.MD
@@ -0,0 +1,36 @@
+# INSTALLATION.MD
+
+## Prerequisites
+
+* Java 8
+* Maven
+
+## Building
+
+### Jar
+
+```
+mvn clean package
+```
+
+
+```
+./mvnw clean package
+```
+
+
+## Run
+
+### Maven
+
+```
+mvn clean package spring-boot:run
+```
+
+
+
+### Java
+
+```
+java -jar ./oas-validator-web/target/oas-validator-web-exec.jar
+```
diff --git a/oas-validator/doc/USAGE.MD b/oas-validator/doc/USAGE.MD
new file mode 100755
index 0000000..ffe2a0c
--- /dev/null
+++ b/oas-validator/doc/USAGE.MD
@@ -0,0 +1,62 @@
+# 使用手册
+
+
+
+
+## 访问
+
+访问地址：[http://localhost:8080/](http://localhost:8080/)
+
+
+
+## 工具
+
+### 查看器
+
+敬请期待……
+
+
+
+### 编辑器
+
+敬请期待……
+
+
+
+### 验证器
+
+分为 **合规性验证** 和 **兼容性检查**
+
+#### 合规性验证
+
+对 OpenAPI Spec 文档进行规范验证，对违反规范的错误作出提示。
+
+
+
+##### 操作示例
+
+1. Step 1
+
+   ![](./compliance-1.png)
+
+2. Step 2
+
+   ![](./compliance-2.png)
+
+
+
+#### 兼容性检查
+
+对新旧两个 OpenAPI Spec 文档进行兼容性比较，检查出文档更新过程中出现的无法向下兼容的错误
+
+
+##### 操作示例
+
+1. Step 1
+
+   ![](./compatibility-1.png)
+
+2. Step 2
+
+   ![](./compatibility-2.png)
+
diff --git a/oas-validator/doc/compatibility-1.png b/oas-validator/doc/compatibility-1.png
new file mode 100755
index 0000000..1eecf0b
Binary files /dev/null and b/oas-validator/doc/compatibility-1.png differ
diff --git a/oas-validator/doc/compatibility-2.png b/oas-validator/doc/compatibility-2.png
new file mode 100755
index 0000000..8794faa
Binary files /dev/null and b/oas-validator/doc/compatibility-2.png differ
diff --git a/oas-validator/doc/compliance-1.png b/oas-validator/doc/compliance-1.png
new file mode 100755
index 0000000..3227baf
Binary files /dev/null and b/oas-validator/doc/compliance-1.png differ
diff --git a/oas-validator/doc/compliance-2.png b/oas-validator/doc/compliance-2.png
new file mode 100755
index 0000000..8a32c0c
Binary files /dev/null and b/oas-validator/doc/compliance-2.png differ
diff --git a/oas-validator/mvnw b/oas-validator/mvnw
new file mode 100755
index 0000000..e96ccd5
--- /dev/null
+++ b/oas-validator/mvnw
@@ -0,0 +1,227 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven2 Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+  # TODO classpath?
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
diff --git a/oas-validator/mvnw.cmd b/oas-validator/mvnw.cmd
new file mode 100755
index 0000000..4f0b068
--- /dev/null
+++ b/oas-validator/mvnw.cmd
@@ -0,0 +1,145 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven2 Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a key stroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing my setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%
diff --git a/oas-validator/oas-validator-compatibility-spring/pom.xml b/oas-validator/oas-validator-compatibility-spring/pom.xml
new file mode 100755
index 0000000..913db0c
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/pom.xml
@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.servicecomb.toolkit</groupId>
+    <artifactId>oas-validator-parent</artifactId>
+    <version>0.2.0-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+
+  <groupId>org.apache.servicecomb.toolkit</groupId>
+  <artifactId>oas-validator-compatibility-spring</artifactId>
+  <version>${parent.version}</version>
+
+  <dependencies>
+
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-compatibility</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-core-spring</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-test</artifactId>
+    </dependency>
+
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+      </plugin>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-report-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/EncodingDiffValidatorsConfiguration.java b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/EncodingDiffValidatorsConfiguration.java
new file mode 100755
index 0000000..c547974
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/EncodingDiffValidatorsConfiguration.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.config;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding.*;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.EncodingDiffValidator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class EncodingDiffValidatorsConfiguration {
+
+  @Bean
+  public EncodingDiffValidator encodingAddNotAllowedDiffValidator() {
+    return new EncodingAddNotAllowedDiffValidator();
+  }
+
+  @Bean
+  public EncodingDiffValidator encodingDelNotAllowedDiffValidator() {
+    return new EncodingDelNotAllowedDiffValidator();
+  }
+
+  @Bean
+  public EncodingDiffValidator encodingAllowedReservedChangeDiffValidator() {
+    return new EncodingAllowedReservedChangeDiffValidator();
+  }
+
+  @Bean
+  public EncodingDiffValidator encodingContentTypeNotSameDiffValidator() {
+    return new EncodingContentTypeNotSameDiffValidator();
+  }
+
+  @Bean
+  public EncodingDiffValidator encodingExplodeNotSameDiffValidator() {
+    return new EncodingExplodeNotSameDiffValidator();
+  }
+
+  @Bean
+  public EncodingDiffValidator encodingStyleNotSameDiffValidator() {
+    return new EncodingStyleNotSameDiffValidator();
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/HeaderDiffValidatorsConfiguration.java b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/HeaderDiffValidatorsConfiguration.java
new file mode 100755
index 0000000..aaf35da
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/HeaderDiffValidatorsConfiguration.java
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.config;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.HeaderDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.header.HeaderAddInRequestBodyNotAllowedDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.header.HeaderDelInResponseNotAllowedDiffValidator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class HeaderDiffValidatorsConfiguration {
+
+  @Bean
+  public HeaderDiffValidator headerAddInRequestBodyNotAllowedDiffValidator() {
+    return new HeaderAddInRequestBodyNotAllowedDiffValidator();
+  }
+
+  @Bean
+  public HeaderDiffValidator headerDelInResponseNotAllowedDiffValidator() {
+    return new HeaderDelInResponseNotAllowedDiffValidator();
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/MediaTypeDiffValidatorsConfiguration.java b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/MediaTypeDiffValidatorsConfiguration.java
new file mode 100755
index 0000000..023bfa2
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/MediaTypeDiffValidatorsConfiguration.java
@@ -0,0 +1,51 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.config;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.MediaTypeDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype.MediaTypeAddInParameterNotAllowedDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype.MediaTypeDelInParameterNotAllowedDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype.MediaTypeDelInRequestBodyNotAllowedDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype.MediaTypeDelInResponseNotAllowedDiffValidator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MediaTypeDiffValidatorsConfiguration {
+
+  @Bean
+  public MediaTypeDiffValidator mediaTypeAddInParameterNotAllowedDiffValidator() {
+    return new MediaTypeAddInParameterNotAllowedDiffValidator();
+  }
+
+  @Bean
+  public MediaTypeDiffValidator mediaTypeDelInParameterNotAllowedDiffValidator() {
+    return new MediaTypeDelInParameterNotAllowedDiffValidator();
+  }
+
+  @Bean
+  public MediaTypeDiffValidator mediaTypeDelInRequestBodyNotAllowedDiffValidator() {
+    return new MediaTypeDelInRequestBodyNotAllowedDiffValidator();
+  }
+
+  @Bean
+  public MediaTypeDiffValidator mediaTypeDelInResponseNotAllowedDiffValidator() {
+    return new MediaTypeDelInResponseNotAllowedDiffValidator();
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/OperationDiffValidatorsConfiguration.java b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/OperationDiffValidatorsConfiguration.java
new file mode 100755
index 0000000..e82dc36
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/OperationDiffValidatorsConfiguration.java
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.config;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.operation.OperationDeleteNotAllowedDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.operation.OperationIdNotSameDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OperationDiffValidator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class OperationDiffValidatorsConfiguration {
+
+  @Bean
+  public OperationDiffValidator operationDeleteNotAllowedDiffValidator() {
+    return new OperationDeleteNotAllowedDiffValidator();
+  }
+
+  @Bean
+  public OperationDiffValidator operationIdNotSameDiffValidator() {
+    return new OperationIdNotSameDiffValidator();
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/ParameterDiffValidatorsConfiguration.java b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/ParameterDiffValidatorsConfiguration.java
new file mode 100755
index 0000000..f007e49
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/ParameterDiffValidatorsConfiguration.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.config;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.parameter.*;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.ParameterDiffValidator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ParameterDiffValidatorsConfiguration {
+
+  @Bean
+  public ParameterDiffValidator parameterAddDiffValidator() {
+    return new ParameterAddDiffValidator();
+  }
+
+  @Bean
+  public ParameterDiffValidator parameterRequiredChangeDiffValidator() {
+    return new ParameterRequiredChangeDiffValidator();
+  }
+
+  @Bean
+  public ParameterDiffValidator parameterAllowEmptyValueChangeDiffValidator() {
+    return new ParameterAllowEmptyValueChangeDiffValidator();
+  }
+
+  @Bean
+  public ParameterDiffValidator parameterStyleNotSameDiffValidator() {
+    return new ParameterStyleNotSameDiffValidator();
+  }
+
+  @Bean
+  public ParameterDiffValidator parameterExplodeNotSameDiffValidator() {
+    return new ParameterExplodeNotSameDiffValidator();
+  }
+
+  @Bean
+  public ParameterDiffValidator parameterAllowReservedChangeDiffValidator() {
+    return new ParameterAllowReservedChangeDiffValidator();
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/PathItemDiffValidatorsConfiguration.java b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/PathItemDiffValidatorsConfiguration.java
new file mode 100755
index 0000000..ef930c2
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/PathItemDiffValidatorsConfiguration.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.config;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.PathItemDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.pathitem.PathItemDeleteNotAllowedDiffValidator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class PathItemDiffValidatorsConfiguration {
+
+  @Bean
+  public PathItemDiffValidator pathItemDeleteNotAllowedValidator() {
+    return new PathItemDeleteNotAllowedDiffValidator();
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/RequestBodyDiffValidatorsConfiguration.java b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/RequestBodyDiffValidatorsConfiguration.java
new file mode 100755
index 0000000..4fb57a2
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/RequestBodyDiffValidatorsConfiguration.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.config;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.RequestBodyDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.requestbody.RequestBodyRequiredChangeDiffValidator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class RequestBodyDiffValidatorsConfiguration {
+
+  @Bean
+  public RequestBodyDiffValidator requestBodyRequiredChangeDiffValidator() {
+    return new RequestBodyRequiredChangeDiffValidator();
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/ResponseDiffValidatorsConfiguration.java b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/ResponseDiffValidatorsConfiguration.java
new file mode 100755
index 0000000..82996a0
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/ResponseDiffValidatorsConfiguration.java
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.config;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.ResponseDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.response.ResponseAddNotAllowedDiffValidator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ResponseDiffValidatorsConfiguration {
+
+  @Bean
+  public ResponseDiffValidator responseAddNotAllowedDiffValidator() {
+    return new ResponseAddNotAllowedDiffValidator();
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/SchemaDiffValidatorsConfiguration.java b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/SchemaDiffValidatorsConfiguration.java
new file mode 100755
index 0000000..91d6930
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/config/SchemaDiffValidatorsConfiguration.java
@@ -0,0 +1,212 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.config;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request.*;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response.*;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.SchemaCompareValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaDiscriminatorChangeValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaReadOnlyChangeValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaWriteOnlyChangeValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaXmlChangeValidator;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class SchemaDiffValidatorsConfiguration {
+
+  @Bean
+  public SchemaCompareValidator schemaTypeFormatInRequestCompareValidator() {
+    return new SchemaTypeFormatChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaTypeFormatInResponseCompareValidator() {
+    return new SchemaTypeFormatChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMultipleOfChangeInRequestValidator() {
+    return new SchemaMultipleOfChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMaximumChangeInResponseValidator() {
+    return new SchemaMaximumChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMaximumChangeInRequestValidator() {
+    return new SchemaMaximumChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaExclusiveMinimumChangeInRequestValidator() {
+    return new SchemaExclusiveMinimumChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaExclusiveMaximumChangeInRequestValidator() {
+    return new SchemaExclusiveMaximumChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaExclusiveMaximumChangeInResponseValidator() {
+    return new SchemaExclusiveMaximumChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaExclusiveMinimumChangeInResponseValidator() {
+    return new SchemaExclusiveMinimumChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMaxItemsChangeInRequestValidator() {
+    return new SchemaMaxItemsChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMaxLengthChangeInRequestValidator() {
+    return new SchemaMaxLengthChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMaxPropertiesChangeInRequestValidator() {
+    return new SchemaMaxPropertiesChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMinimumChangeInRequestValidator() {
+    return new SchemaMinimumChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMinItemsChangeInRequestValidator() {
+    return new SchemaMinItemsChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMinLengthChangeInRequestValidator() {
+    return new SchemaMinLengthChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMinPropertiesChangeInRequestValidator() {
+    return new SchemaMinPropertiesChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaUniqueItemsChangeInRequestValidator() {
+    return new SchemaUniqueItemsChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaRequiredChangeInRequestValidator() {
+    return new SchemaRequiredChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaEnumChangeInRequestValidator() {
+    return new SchemaEnumChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaNullableChangeInRequestValidator() {
+    return new SchemaNullableChangeInRequestValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaReadOnlyChangeValidator() {
+    return new SchemaReadOnlyChangeValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaWriteOnlyChangeValidator() {
+    return new SchemaWriteOnlyChangeValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaXmlChangeValidator() {
+    return new SchemaXmlChangeValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaDiscriminatorChangeValidator() {
+    return new SchemaDiscriminatorChangeValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMultipleOfChangeInResponseValidator() {
+    return new SchemaMultipleOfChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMaxItemsChangeInResponseValidator() {
+    return new SchemaMaxItemsChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMaxLengthChangeInResponseValidator() {
+    return new SchemaMaxLengthChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMaxPropertiesChangeInResponseValidator() {
+    return new SchemaMaxPropertiesChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMinimumChangeInResponseValidator() {
+    return new SchemaMinimumChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMinItemsChangeInResponseValidator() {
+    return new SchemaMinItemsChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMinLengthChangeInResponseValidator() {
+    return new SchemaMinLengthChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaMinPropertiesChangeInResponseValidator() {
+    return new SchemaMinPropertiesChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaUniqueItemsChangeInResponseValidator() {
+    return new SchemaUniqueItemsChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaRequiredChangeInResponseValidator() {
+    return new SchemaRequiredChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaEnumChangeInResponseValidator() {
+    return new SchemaEnumChangeInResponseValidator();
+  }
+
+  @Bean
+  public SchemaCompareValidator schemaNullableChangeInResponseValidator() {
+    return new SchemaNullableChangeInResponseValidator();
+  }
+}
diff --git a/oas-validator/oas-validator-compatibility-spring/src/main/resources/META-INF/spring.factories b/oas-validator/oas-validator-compatibility-spring/src/main/resources/META-INF/spring.factories
new file mode 100755
index 0000000..fb0c853
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility-spring/src/main/resources/META-INF/spring.factories
@@ -0,0 +1,10 @@
+org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
+org.apache.servicecomb.toolkit.oasv.compatibility.config.EncodingDiffValidatorsConfiguration,\
+org.apache.servicecomb.toolkit.oasv.compatibility.config.HeaderDiffValidatorsConfiguration,\
+org.apache.servicecomb.toolkit.oasv.compatibility.config.MediaTypeDiffValidatorsConfiguration,\
+org.apache.servicecomb.toolkit.oasv.compatibility.config.OperationDiffValidatorsConfiguration,\
+org.apache.servicecomb.toolkit.oasv.compatibility.config.ParameterDiffValidatorsConfiguration,\
+org.apache.servicecomb.toolkit.oasv.compatibility.config.PathItemDiffValidatorsConfiguration,\
+org.apache.servicecomb.toolkit.oasv.compatibility.config.RequestBodyDiffValidatorsConfiguration,\
+org.apache.servicecomb.toolkit.oasv.compatibility.config.ResponseDiffValidatorsConfiguration,\
+org.apache.servicecomb.toolkit.oasv.compatibility.config.SchemaDiffValidatorsConfiguration
diff --git a/oas-validator/oas-validator-compatibility/pom.xml b/oas-validator/oas-validator-compatibility/pom.xml
new file mode 100755
index 0000000..cb4bb4d
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/pom.xml
@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.servicecomb.toolkit</groupId>
+    <artifactId>oas-validator-parent</artifactId>
+    <version>0.2.0-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+
+  <groupId>org.apache.servicecomb.toolkit</groupId>
+  <artifactId>oas-validator-compatibility</artifactId>
+  <version>${parent.version}</version>
+
+  <properties>
+  </properties>
+
+  <dependencies>
+
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-core</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+
+    <!-- test deps -->
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-test</artifactId>
+      <version>${project.version}</version>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.apache.servicecomb.toolkit</groupId>
+      <artifactId>oas-validator-core-spring</artifactId>
+      <version>${project.version}</version>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-test</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+      </plugin>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-report-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAddNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAddNotAllowedDiffValidator.java
new file mode 100755
index 0000000..1db67a1
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAddNotAllowedDiffValidator.java
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.media.Encoding;
+
+import java.util.List;
+
+import static java.util.Collections.singletonList;
+
+public class EncodingAddNotAllowedDiffValidator
+  extends OasObjectDiffValidatorTemplate<Encoding>
+  implements EncodingDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateAdd(OasDiffValidationContext context,
+    OasObjectPropertyLocation rightLocation, Encoding rightOasObject) {
+    return singletonList(OasDiffViolation.onlyRight(rightLocation, DiffViolationMessages.OP_ADD_FORBIDDEN));
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAllowedReservedChangeDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAllowedReservedChangeDiffValidator.java
new file mode 100755
index 0000000..614471b
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAllowedReservedChangeDiffValidator.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.EncodingDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasObjectDiffValidatorTemplate;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import io.swagger.v3.oas.models.media.Encoding;
+
+import java.util.List;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+import static org.apache.commons.lang3.ObjectUtils.defaultIfNull;
+
+public class EncodingAllowedReservedChangeDiffValidator
+  extends OasObjectDiffValidatorTemplate<Encoding>
+  implements EncodingDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Encoding leftOasObject, OasObjectPropertyLocation rightLocation,
+    Encoding rightOasObject) {
+
+    if (ChangeRangeCheckUtils.isNotViolated(
+      defaultIfNull(leftOasObject.getAllowReserved(), Boolean.FALSE),
+      defaultIfNull(rightOasObject.getAllowReserved(), Boolean.FALSE),
+      singletonList(new Object[] { false, true }))) {
+      return emptyList();
+    }
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("allowReserved"),
+      rightLocation.property("allowReserved"),
+      "仅允许false->true的修改"
+    ));
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingContentTypeNotSameDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingContentTypeNotSameDiffValidator.java
new file mode 100755
index 0000000..932981d
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingContentTypeNotSameDiffValidator.java
@@ -0,0 +1,51 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.media.Encoding;
+
+import java.util.List;
+import java.util.Objects;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+public class EncodingContentTypeNotSameDiffValidator
+  extends OasObjectDiffValidatorTemplate<Encoding>
+  implements EncodingDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Encoding leftOasObject, OasObjectPropertyLocation rightLocation,
+    Encoding rightOasObject) {
+
+    if (Objects.equals(leftOasObject.getContentType(), rightOasObject.getContentType())) {
+      return emptyList();
+    }
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("contentType"),
+      rightLocation.property("contentType"),
+      DiffViolationMessages.NEW_NOT_EQ_OLD
+    ));
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingDelNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingDelNotAllowedDiffValidator.java
new file mode 100755
index 0000000..1933510
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingDelNotAllowedDiffValidator.java
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.media.Encoding;
+
+import java.util.List;
+
+import static java.util.Collections.singletonList;
+
+public class EncodingDelNotAllowedDiffValidator
+  extends OasObjectDiffValidatorTemplate<Encoding>
+  implements EncodingDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateDel(OasDiffValidationContext context, OasObjectPropertyLocation leftLocation,
+    Encoding leftOasObject) {
+    return singletonList(OasDiffViolation.onlyLeft(leftLocation, DiffViolationMessages.OP_DEL_FORBIDDEN));
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingExplodeNotSameDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingExplodeNotSameDiffValidator.java
new file mode 100755
index 0000000..7b97226
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingExplodeNotSameDiffValidator.java
@@ -0,0 +1,51 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.media.Encoding;
+
+import java.util.List;
+import java.util.Objects;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+public class EncodingExplodeNotSameDiffValidator
+  extends OasObjectDiffValidatorTemplate<Encoding>
+  implements EncodingDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Encoding leftOasObject, OasObjectPropertyLocation rightLocation,
+    Encoding rightOasObject) {
+
+    if (Objects.equals(leftOasObject.getExplode(), rightOasObject.getExplode())) {
+      return emptyList();
+    }
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("explode"),
+      rightLocation.property("explode"),
+      DiffViolationMessages.NEW_NOT_EQ_OLD
+    ));
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingStyleNotSameDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingStyleNotSameDiffValidator.java
new file mode 100755
index 0000000..760290b
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingStyleNotSameDiffValidator.java
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.media.Encoding;
+
+import java.util.List;
+import java.util.Objects;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+public class EncodingStyleNotSameDiffValidator
+  extends OasObjectDiffValidatorTemplate<Encoding>
+  implements EncodingDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Encoding leftOasObject, OasObjectPropertyLocation rightLocation,
+    Encoding rightOasObject) {
+
+    if (Objects.equals(leftOasObject.getStyle(), rightOasObject.getStyle())) {
+      return emptyList();
+    }
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("style"),
+      rightLocation.property("style"),
+      DiffViolationMessages.NEW_NOT_EQ_OLD
+    ));
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderAddInRequestBodyNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderAddInRequestBodyNotAllowedDiffValidator.java
new file mode 100755
index 0000000..7a8c4dd
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderAddInRequestBodyNotAllowedDiffValidator.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.header;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.headers.Header;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+/**
+ * 不允许在requestBody.content.'mediaType'.encoding.'encoding'.headers 下添加Header Object
+ */
+public class HeaderAddInRequestBodyNotAllowedDiffValidator extends OasObjectDiffValidatorTemplate<Header>
+  implements HeaderDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateAdd(OasDiffValidationContext context,
+    OasObjectPropertyLocation rightLocation, Header rightOasObject) {
+    if (!isInRequestBody(context)) {
+      return emptyList();
+    }
+    return singletonList(OasDiffViolation.onlyRight(rightLocation, DiffViolationMessages.OP_ADD_FORBIDDEN));
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderDelInResponseNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderDelInResponseNotAllowedDiffValidator.java
new file mode 100755
index 0000000..8232d22
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderDelInResponseNotAllowedDiffValidator.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.header;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.headers.Header;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+/**
+ * 不允许在responses.'response'.headers.headers 下删除Header Object
+ */
+public class HeaderDelInResponseNotAllowedDiffValidator extends OasObjectDiffValidatorTemplate<Header>
+  implements HeaderDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateDel(OasDiffValidationContext context,
+    OasObjectPropertyLocation rightLocation, Header rightOasObject) {
+    if (!isInResponse(context)) {
+      return emptyList();
+    }
+    return singletonList(OasDiffViolation.onlyLeft(rightLocation, DiffViolationMessages.OP_DEL_FORBIDDEN));
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeAddInParameterNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeAddInParameterNotAllowedDiffValidator.java
new file mode 100755
index 0000000..877694f
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeAddInParameterNotAllowedDiffValidator.java
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.media.MediaType;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+/**
+ * 不允许在Parameter.content下添加MediaType
+ */
+public class MediaTypeAddInParameterNotAllowedDiffValidator
+  extends OasObjectDiffValidatorTemplate<MediaType>
+  implements MediaTypeDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateAdd(OasDiffValidationContext context,
+    OasObjectPropertyLocation rightLocation, MediaType rightOasObject) {
+    if (!isInParameter(context)) {
+      return emptyList();
+    }
+    return singletonList(OasDiffViolation.onlyRight(rightLocation, DiffViolationMessages.OP_ADD_FORBIDDEN));
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInParameterNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInParameterNotAllowedDiffValidator.java
new file mode 100755
index 0000000..eca4ac3
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInParameterNotAllowedDiffValidator.java
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.media.MediaType;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+/**
+ * 不允许在Parameter.content下删除MediaType
+ */
+public class MediaTypeDelInParameterNotAllowedDiffValidator
+  extends OasObjectDiffValidatorTemplate<MediaType>
+  implements MediaTypeDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateDel(OasDiffValidationContext context, OasObjectPropertyLocation leftLocation,
+    MediaType leftOasObject) {
+    if (!isInParameter(context)) {
+      return emptyList();
+    }
+    return singletonList(OasDiffViolation.onlyLeft(leftLocation, DiffViolationMessages.OP_DEL_FORBIDDEN));
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInRequestBodyNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInRequestBodyNotAllowedDiffValidator.java
new file mode 100755
index 0000000..6a50f83
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInRequestBodyNotAllowedDiffValidator.java
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.media.MediaType;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+/**
+ * 不允许在RequestBody.content下删除MediaType
+ */
+public class MediaTypeDelInRequestBodyNotAllowedDiffValidator
+  extends OasObjectDiffValidatorTemplate<MediaType>
+  implements MediaTypeDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateDel(OasDiffValidationContext context, OasObjectPropertyLocation leftLocation,
+    MediaType leftOasObject) {
+    if (!isInRequestBody(context)) {
+      return emptyList();
+    }
+    return singletonList(OasDiffViolation.onlyLeft(leftLocation, DiffViolationMessages.OP_DEL_FORBIDDEN));
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInResponseNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInResponseNotAllowedDiffValidator.java
new file mode 100755
index 0000000..243a60b
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInResponseNotAllowedDiffValidator.java
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.media.MediaType;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+/**
+ * 不允许在responses.'response'.content.'mediaType' 下删除Header Object
+ */
+public class MediaTypeDelInResponseNotAllowedDiffValidator
+  extends OasObjectDiffValidatorTemplate<MediaType>
+  implements MediaTypeDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateDel(OasDiffValidationContext context, OasObjectPropertyLocation leftLocation,
+    MediaType leftOasObject) {
+    if (!isInResponse(context)) {
+      return emptyList();
+    }
+    return singletonList(OasDiffViolation.onlyLeft(leftLocation, DiffViolationMessages.OP_DEL_FORBIDDEN));
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationDeleteNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationDeleteNotAllowedDiffValidator.java
new file mode 100755
index 0000000..1544dc3
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationDeleteNotAllowedDiffValidator.java
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.operation;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.Operation;
+
+import java.util.List;
+
+import static java.util.Collections.singletonList;
+
+public class OperationDeleteNotAllowedDiffValidator
+  extends OasObjectDiffValidatorTemplate<Operation>
+  implements OperationDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateDel(OasDiffValidationContext context, OasObjectPropertyLocation leftLocation,
+    Operation leftOasObject) {
+
+    return singletonList(OasDiffViolation.onlyLeft(leftLocation, DiffViolationMessages.OP_DEL_FORBIDDEN));
+  }
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationIdNotSameDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationIdNotSameDiffValidator.java
new file mode 100755
index 0000000..7aa5b34
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationIdNotSameDiffValidator.java
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.operation;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.Operation;
+
+import java.util.List;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+public class OperationIdNotSameDiffValidator
+  extends OasObjectDiffValidatorTemplate<Operation>
+  implements OperationDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Operation leftOasObject, OasObjectPropertyLocation rightLocation,
+    Operation rightOasObject) {
+    if (leftOasObject.getOperationId().equalsIgnoreCase(rightOasObject.getOperationId())) {
+      return emptyList();
+    }
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("operationId"),
+      rightLocation.property("operationId"),
+      DiffViolationMessages.NEW_NOT_EQ_OLD));
+
+  }
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterAddDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterAddDiffValidator.java
new file mode 100755
index 0000000..e5ee7e2
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterAddDiffValidator.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.parameter;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasObjectDiffValidatorTemplate;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.ParameterDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ParameterUtils;
+import io.swagger.v3.oas.models.parameters.Parameter;
+
+import java.util.List;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+public class ParameterAddDiffValidator
+  extends OasObjectDiffValidatorTemplate<Parameter>
+  implements ParameterDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateAdd(OasDiffValidationContext context,
+    OasObjectPropertyLocation rightLocation, Parameter rightOasObject) {
+
+    if (Boolean.FALSE.equals(rightOasObject.getRequired())) {
+      return emptyList();
+    }
+
+    String message = new StringBuilder()
+      .append(ParameterUtils.getKeyString(rightOasObject))
+      .append(':')
+      .append("仅允许新增required=false的parameter")
+      .toString()
+      ;
+
+    return singletonList(OasDiffViolation.onlyRight(rightLocation.property("required"), message));
+
+  }
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterAllowEmptyValueChangeDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterAllowEmptyValueChangeDiffValidator.java
new file mode 100755
index 0000000..8ac7d39
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterAllowEmptyValueChangeDiffValidator.java
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.parameter;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasObjectDiffValidatorTemplate;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.ParameterDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ParameterUtils;
+import io.swagger.v3.oas.models.parameters.Parameter;
+
+import java.util.List;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+import static org.apache.commons.lang3.ObjectUtils.defaultIfNull;
+
+/**
+ * 仅允许false->true的修改
+ */
+public class ParameterAllowEmptyValueChangeDiffValidator
+  extends OasObjectDiffValidatorTemplate<Parameter>
+  implements ParameterDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Parameter leftOasObject, OasObjectPropertyLocation rightLocation,
+    Parameter rightOasObject) {
+
+
+    if (ChangeRangeCheckUtils.isNotViolated(
+      defaultIfNull(leftOasObject.getAllowEmptyValue(), Boolean.FALSE),
+      defaultIfNull(rightOasObject.getAllowEmptyValue(), Boolean.FALSE),
+      singletonList(new Object[] { false, true }))) {
+      return emptyList();
+    }
+
+    String message = new StringBuilder()
+      .append(ParameterUtils.getKeyString(rightOasObject))
+      .append(':')
+      .append("仅允许false->true的修改")
+      .toString();
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("allowEmptyValue"),
+      rightLocation.property("allowEmptyValue"),
+      message
+    ));
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterAllowReservedChangeDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterAllowReservedChangeDiffValidator.java
new file mode 100755
index 0000000..9cca97a
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterAllowReservedChangeDiffValidator.java
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.parameter;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasObjectDiffValidatorTemplate;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.ParameterDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ParameterUtils;
+import io.swagger.v3.oas.models.parameters.Parameter;
+
+import java.util.List;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+import static org.apache.commons.lang3.ObjectUtils.defaultIfNull;
+
+/**
+ * 仅允许false->true的修改
+ */
+public class ParameterAllowReservedChangeDiffValidator
+  extends OasObjectDiffValidatorTemplate<Parameter>
+  implements ParameterDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Parameter leftOasObject, OasObjectPropertyLocation rightLocation,
+    Parameter rightOasObject) {
+
+    if (ChangeRangeCheckUtils.isNotViolated(
+      defaultIfNull(leftOasObject.getAllowReserved(), Boolean.FALSE),
+      defaultIfNull(rightOasObject.getAllowReserved(), Boolean.FALSE),
+      singletonList(new Object[] { false, true }))) {
+      return emptyList();
+    }
+
+    String message = new StringBuilder()
+      .append(ParameterUtils.getKeyString(rightOasObject))
+      .append(':')
+      .append("仅允许false->true的修改")
+      .toString();
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("allowReserved"),
+      rightLocation.property("allowReserved"),
+      message
+    ));
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterExplodeNotSameDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterExplodeNotSameDiffValidator.java
new file mode 100755
index 0000000..1089b22
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterExplodeNotSameDiffValidator.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.parameter;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ParameterUtils;
+import io.swagger.v3.oas.models.parameters.Parameter;
+
+import java.util.List;
+import java.util.Objects;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+public class ParameterExplodeNotSameDiffValidator
+  extends OasObjectDiffValidatorTemplate<Parameter>
+  implements ParameterDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Parameter leftOasObject, OasObjectPropertyLocation rightLocation,
+    Parameter rightOasObject) {
+
+    if (Objects.equals(leftOasObject.getExplode(), rightOasObject.getExplode())) {
+      return emptyList();
+    }
+
+    String message = new StringBuilder()
+      .append(ParameterUtils.getKeyString(rightOasObject))
+      .append(':')
+      .append(DiffViolationMessages.NEW_NOT_EQ_OLD)
+      .toString();
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("explode"),
+      rightLocation.property("explode"),
+      message
+    ));
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterRequiredChangeDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterRequiredChangeDiffValidator.java
new file mode 100755
index 0000000..f629812
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterRequiredChangeDiffValidator.java
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.parameter;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasObjectDiffValidatorTemplate;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.ParameterDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ParameterUtils;
+import io.swagger.v3.oas.models.parameters.Parameter;
+
+import java.util.List;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+import static org.apache.commons.lang3.ObjectUtils.defaultIfNull;
+
+/**
+ * 仅允许true->false的修改
+ */
+public class ParameterRequiredChangeDiffValidator
+  extends OasObjectDiffValidatorTemplate<Parameter>
+  implements ParameterDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Parameter leftOasObject, OasObjectPropertyLocation rightLocation,
+    Parameter rightOasObject) {
+
+    if (ChangeRangeCheckUtils.isNotViolated(
+      defaultIfNull(leftOasObject.getRequired(), Boolean.FALSE),
+      defaultIfNull(rightOasObject.getRequired(), Boolean.FALSE),
+      singletonList(new Object[] { true, false }))) {
+      return emptyList();
+    }
+
+    String message = new StringBuilder()
+      .append(ParameterUtils.getKeyString(rightOasObject))
+      .append(':')
+      .append("仅允许true->false的修改")
+      .toString();
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("required"),
+      rightLocation.property("required"),
+      message
+    ));
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterStyleNotSameDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterStyleNotSameDiffValidator.java
new file mode 100755
index 0000000..746babb
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/parameter/ParameterStyleNotSameDiffValidator.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.parameter;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ParameterUtils;
+import io.swagger.v3.oas.models.parameters.Parameter;
+
+import java.util.List;
+import java.util.Objects;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+public class ParameterStyleNotSameDiffValidator
+  extends OasObjectDiffValidatorTemplate<Parameter>
+  implements ParameterDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, Parameter leftOasObject, OasObjectPropertyLocation rightLocation,
+    Parameter rightOasObject) {
+
+    if (Objects.equals(leftOasObject.getStyle(), rightOasObject.getStyle())) {
+      return emptyList();
+    }
+
+    String message = new StringBuilder()
+      .append(ParameterUtils.getKeyString(rightOasObject))
+      .append(':')
+      .append(DiffViolationMessages.NEW_NOT_EQ_OLD)
+      .toString();
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("style"),
+      rightLocation.property("style"),
+      message
+    ));
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/pathitem/PathItemDeleteNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/pathitem/PathItemDeleteNotAllowedDiffValidator.java
new file mode 100755
index 0000000..7f7914b
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/pathitem/PathItemDeleteNotAllowedDiffValidator.java
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.pathitem;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.PathItem;
+
+import java.util.List;
+
+import static java.util.Collections.singletonList;
+
+public class PathItemDeleteNotAllowedDiffValidator
+  extends OasObjectDiffValidatorTemplate<PathItem>
+  implements PathItemDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateDel(OasDiffValidationContext context, OasObjectPropertyLocation leftLocation,
+    PathItem leftOasObject) {
+
+    return singletonList(OasDiffViolation.onlyLeft(leftLocation, DiffViolationMessages.OP_DEL_FORBIDDEN));
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/requestbody/RequestBodyRequiredChangeDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/requestbody/RequestBodyRequiredChangeDiffValidator.java
new file mode 100755
index 0000000..76acb03
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/requestbody/RequestBodyRequiredChangeDiffValidator.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.requestbody;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasObjectDiffValidatorTemplate;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.RequestBodyDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import io.swagger.v3.oas.models.parameters.RequestBody;
+import org.apache.commons.lang3.ObjectUtils;
+
+import java.util.List;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+/**
+ * 仅允许true->false的修改
+ */
+public class RequestBodyRequiredChangeDiffValidator
+  extends OasObjectDiffValidatorTemplate<RequestBody>
+  implements RequestBodyDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateCompare(OasDiffValidationContext context,
+    OasObjectPropertyLocation leftLocation, RequestBody leftOasObject, OasObjectPropertyLocation rightLocation,
+    RequestBody rightOasObject) {
+
+    if (ChangeRangeCheckUtils.isNotViolated(
+      ObjectUtils.defaultIfNull(leftOasObject.getRequired(), Boolean.FALSE),
+      ObjectUtils.defaultIfNull(rightOasObject.getRequired(), Boolean.FALSE),
+      singletonList(new Object[] { true, false }))) {
+      return emptyList();
+    }
+
+    return singletonList(new OasDiffViolation(
+      leftLocation.property("required"),
+      rightLocation.property("required"),
+      "仅允许true->false的修改"
+    ));
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/response/ResponseAddNotAllowedDiffValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/response/ResponseAddNotAllowedDiffValidator.java
new file mode 100755
index 0000000..dacb282
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/response/ResponseAddNotAllowedDiffValidator.java
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.response;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.*;
+import io.swagger.v3.oas.models.responses.ApiResponse;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation.onlyRight;
+import static java.util.Collections.singletonList;
+
+/**
+ * 不允许在responses.'http status code'.下新增 Response Object
+ */
+public class ResponseAddNotAllowedDiffValidator
+  extends OasObjectDiffValidatorTemplate<ApiResponse>
+  implements ResponseDiffValidator {
+
+  @Override
+  protected List<OasDiffViolation> validateAdd(OasDiffValidationContext context,
+    OasObjectPropertyLocation rightLocation, ApiResponse rightOasObject) {
+    return singletonList(onlyRight(rightLocation, DiffViolationMessages.OP_ADD_FORBIDDEN));
+  }
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaDiscriminatorChangeValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaDiscriminatorChangeValidator.java
new file mode 100755
index 0000000..2096b2b
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaDiscriminatorChangeValidator.java
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import io.swagger.v3.oas.models.media.Discriminator;
+import io.swagger.v3.oas.models.media.Schema;
+
+public class SchemaDiscriminatorChangeValidator extends SchemaPropertyChangeValidator<Discriminator> {
+
+  @Override
+  protected Discriminator getProperty(Schema schema) {
+    return schema.getDiscriminator();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "discriminator";
+  }
+
+  @Override
+  protected boolean isAllowed(Discriminator leftProperty, Discriminator rightProperty) {
+    return leftProperty.equals(rightProperty);
+  }
+
+  @Override
+  protected String getMessage(Discriminator leftProperty, Discriminator rightProperty) {
+    return DiffViolationMessages.NEW_NOT_EQ_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return true;
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaPropertyChangeValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaPropertyChangeValidator.java
new file mode 100755
index 0000000..c225466
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaPropertyChangeValidator.java
@@ -0,0 +1,84 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.SchemaCompareValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import java.util.List;
+import java.util.Objects;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+public abstract class SchemaPropertyChangeValidator<T> implements SchemaCompareValidator {
+
+  @Override
+  public final List<OasDiffViolation> validate(OasDiffValidationContext context, OasObjectPropertyLocation leftLocation,
+    Schema leftOasObject, OasObjectPropertyLocation rightLocation, Schema rightOasObject) {
+
+    if (!needValidate(context)) {
+      return emptyList();
+    }
+
+    T leftNumber = getProperty(leftOasObject);
+    T rightNumber = getProperty(rightOasObject);
+
+    if (Objects.equals(leftNumber, rightNumber)) {
+      return emptyList();
+    }
+
+    String propertyName = getPropertyName();
+
+    if (leftNumber == null || rightNumber == null) {
+      return singletonList(new OasDiffViolation(
+          leftLocation.property(propertyName),
+          rightLocation.property(propertyName),
+          getMessage(leftNumber, rightNumber)
+        )
+      );
+    }
+
+    if (!isAllowed(leftNumber, rightNumber)) {
+      return singletonList(new OasDiffViolation(
+          leftLocation.property(propertyName),
+          rightLocation.property(propertyName),
+          getMessage(leftNumber, rightNumber)
+        )
+      );
+    }
+
+    return emptyList();
+
+  }
+
+
+  protected abstract T getProperty(Schema schema);
+
+  protected abstract String getPropertyName();
+
+  protected abstract String getMessage(T leftProperty, T rightProperty);
+
+  protected abstract boolean isAllowed(T leftProperty, T rightProperty);
+
+  protected abstract boolean needValidate(OasDiffValidationContext context);
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaReadOnlyChangeValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaReadOnlyChangeValidator.java
new file mode 100755
index 0000000..5d57f94
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaReadOnlyChangeValidator.java
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+public class SchemaReadOnlyChangeValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getReadOnly(), Boolean.FALSE);
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "readOnly";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+    return leftProperty.equals(rightProperty);
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return DiffViolationMessages.NEW_NOT_EQ_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return true;
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaTypeFormatChangeValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaTypeFormatChangeValidator.java
new file mode 100755
index 0000000..e302456
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaTypeFormatChangeValidator.java
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema;
+
+import org.apache.servicecomb.toolkit.oasv.common.OasObjectPropertyLocation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.SchemaCompareValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import io.swagger.v3.oas.models.media.Schema;
+
+import java.util.List;
+
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+public abstract class SchemaTypeFormatChangeValidator implements SchemaCompareValidator {
+
+  @Override
+  public final List<OasDiffViolation> validate(OasDiffValidationContext context, OasObjectPropertyLocation leftLocation,
+    Schema leftOasObject, OasObjectPropertyLocation rightLocation, Schema rightOasObject) {
+
+    if (!needValidate(context)) {
+      return emptyList();
+    }
+
+    TypeFormat leftTypeFormat = new TypeFormat(leftOasObject);
+    TypeFormat rightTypeFormat = new TypeFormat(rightOasObject);
+
+    if (ChangeRangeCheckUtils.isNotViolated(leftTypeFormat, rightTypeFormat, getAllowedChangedList())) {
+      return emptyList();
+    }
+
+    StringBuilder message = new StringBuilder("不允许");
+    message
+      .append("(type=")
+      .append(leftTypeFormat.getType())
+      .append(",format=")
+      .append(leftTypeFormat.getFormat())
+      .append(')')
+      .append("->")
+      .append("(type=")
+      .append(rightTypeFormat.getType())
+      .append(",format=")
+      .append(rightTypeFormat.getFormat())
+      .append(')')
+      .append("的修改");
+
+    return singletonList(new OasDiffViolation(leftLocation, rightLocation, message.toString()));
+
+  }
+
+  protected abstract List<Object[]> getAllowedChangedList();
+
+  protected abstract boolean needValidate(OasDiffValidationContext context);
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaWriteOnlyChangeValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaWriteOnlyChangeValidator.java
new file mode 100755
index 0000000..17b1789
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaWriteOnlyChangeValidator.java
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+public class SchemaWriteOnlyChangeValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getWriteOnly(), Boolean.FALSE);
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "writeOnly";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+    return leftProperty.equals(rightProperty);
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return DiffViolationMessages.NEW_NOT_EQ_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return true;
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaXmlChangeValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaXmlChangeValidator.java
new file mode 100755
index 0000000..0ecb327
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/SchemaXmlChangeValidator.java
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import io.swagger.v3.oas.models.media.Schema;
+import io.swagger.v3.oas.models.media.XML;
+
+public class SchemaXmlChangeValidator extends SchemaPropertyChangeValidator<XML> {
+
+  @Override
+  protected XML getProperty(Schema schema) {
+    return schema.getXml();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "xml";
+  }
+
+  @Override
+  protected boolean isAllowed(XML leftProperty, XML rightProperty) {
+    return leftProperty.equals(rightProperty);
+  }
+
+  @Override
+  protected String getMessage(XML leftProperty, XML rightProperty) {
+    return DiffViolationMessages.NEW_NOT_EQ_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return true;
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/TypeFormat.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/TypeFormat.java
new file mode 100755
index 0000000..8b1402b
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/TypeFormat.java
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema;
+
+import io.swagger.v3.oas.models.media.Schema;
+
+import java.util.Objects;
+import java.util.StringJoiner;
+
+public class TypeFormat {
+  private final String type;
+  private final String format;
+
+  public TypeFormat(String type, String format) {
+    this.type = type;
+    this.format = format;
+  }
+
+  public TypeFormat(Schema schema) {
+    this.type = schema.getType();
+    this.format = schema.getFormat();
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    TypeFormat that = (TypeFormat) o;
+    return Objects.equals(type, that.type) &&
+      Objects.equals(format, that.format);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(type, format);
+  }
+
+  @Override
+  public String toString() {
+    return new StringJoiner(", ", TypeFormat.class.getSimpleName() + "[", "]")
+      .add("type='" + type + "'")
+      .add("format='" + format + "'")
+      .toString();
+  }
+
+  public String getType() {
+    return type;
+  }
+
+  public String getFormat() {
+    return format;
+  }
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaEnumChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaEnumChangeInRequestValidator.java
new file mode 100755
index 0000000..ef8192f
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaEnumChangeInRequestValidator.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+import static java.util.Collections.emptyList;
+
+public class SchemaEnumChangeInRequestValidator extends SchemaPropertyChangeValidator<List> {
+
+  @Override
+  protected List getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getEnum(), emptyList());
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "enum";
+  }
+
+  @Override
+  protected boolean isAllowed(List leftProperty, List rightProperty) {
+    return rightProperty.containsAll(leftProperty);
+  }
+
+  @Override
+  protected String getMessage(List leftProperty, List rightProperty) {
+    return "不允许删除enum";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaExclusiveMaximumChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaExclusiveMaximumChangeInRequestValidator.java
new file mode 100755
index 0000000..b724510
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaExclusiveMaximumChangeInRequestValidator.java
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+import static java.util.Collections.singletonList;
+
+public class SchemaExclusiveMaximumChangeInRequestValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getExclusiveMaximum(), Boolean.FALSE);
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "exclusiveMaximum";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+
+    return ChangeRangeCheckUtils
+      .isNotViolated(leftProperty, rightProperty, singletonList(new Object[] { true, false }));
+
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return "仅允许true->false的修改";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaExclusiveMinimumChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaExclusiveMinimumChangeInRequestValidator.java
new file mode 100755
index 0000000..5481f59
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaExclusiveMinimumChangeInRequestValidator.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+import static java.util.Collections.singletonList;
+
+public class SchemaExclusiveMinimumChangeInRequestValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getExclusiveMinimum(), Boolean.FALSE);
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "exclusiveMinimum";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+    return ChangeRangeCheckUtils
+      .isNotViolated(leftProperty, rightProperty, singletonList(new Object[] { true, false }));
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return "仅允许true->false的修改";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaxItemsChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaxItemsChangeInRequestValidator.java
new file mode 100755
index 0000000..38d1490
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaxItemsChangeInRequestValidator.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaMaxItemsChangeInRequestValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMaxItems();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "maxItems";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) >= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_GTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaxLengthChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaxLengthChangeInRequestValidator.java
new file mode 100755
index 0000000..a7ef8c7
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaxLengthChangeInRequestValidator.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaMaxLengthChangeInRequestValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMaxLength();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "maxLength";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) >= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_GTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaxPropertiesChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaxPropertiesChangeInRequestValidator.java
new file mode 100755
index 0000000..b6c563c
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaxPropertiesChangeInRequestValidator.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaMaxPropertiesChangeInRequestValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMaxProperties();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "maxProperties";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) >= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_GTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaximumChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaximumChangeInRequestValidator.java
new file mode 100755
index 0000000..5ae2e79
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMaximumChangeInRequestValidator.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import java.math.BigDecimal;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaMaximumChangeInRequestValidator extends SchemaPropertyChangeValidator<BigDecimal> {
+
+  @Override
+  protected BigDecimal getProperty(Schema schema) {
+    return schema.getMaximum();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "maximum";
+  }
+
+  @Override
+  protected boolean isAllowed(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return rightProperty.compareTo(leftProperty) >= 0;
+  }
+
+  @Override
+  protected String getMessage(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return DiffViolationMessages.NEW_NOT_GTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinItemsChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinItemsChangeInRequestValidator.java
new file mode 100755
index 0000000..beaad54
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinItemsChangeInRequestValidator.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaMinItemsChangeInRequestValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMinItems();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "minItems";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) <= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_LTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinLengthChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinLengthChangeInRequestValidator.java
new file mode 100755
index 0000000..40693b2
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinLengthChangeInRequestValidator.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaMinLengthChangeInRequestValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMinLength();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "minLength";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) <= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_LTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinPropertiesChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinPropertiesChangeInRequestValidator.java
new file mode 100755
index 0000000..2b28335
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinPropertiesChangeInRequestValidator.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaMinPropertiesChangeInRequestValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMinProperties();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "minProperties";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) <= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_LTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinimumChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinimumChangeInRequestValidator.java
new file mode 100755
index 0000000..7c68259
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMinimumChangeInRequestValidator.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import java.math.BigDecimal;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaMinimumChangeInRequestValidator extends SchemaPropertyChangeValidator<BigDecimal> {
+
+  @Override
+  protected BigDecimal getProperty(Schema schema) {
+    return schema.getMinimum();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "minimum";
+  }
+
+  @Override
+  protected boolean isAllowed(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return rightProperty.compareTo(leftProperty) <= 0;
+  }
+
+  @Override
+  protected String getMessage(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return DiffViolationMessages.NEW_NOT_LTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMultipleOfChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMultipleOfChangeInRequestValidator.java
new file mode 100755
index 0000000..1a9e619
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaMultipleOfChangeInRequestValidator.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import java.math.BigDecimal;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaMultipleOfChangeInRequestValidator extends SchemaPropertyChangeValidator<BigDecimal> {
+
+  @Override
+  protected BigDecimal getProperty(Schema schema) {
+    return schema.getMultipleOf();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "multipleOf";
+  }
+
+  @Override
+  protected String getMessage(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return "新值必须==旧值或是旧值的因子";
+  }
+
+  @Override
+  protected boolean isAllowed(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return BigDecimal.ZERO.compareTo(leftProperty.divideAndRemainder(rightProperty)[1]) == 0;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaNullableChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaNullableChangeInRequestValidator.java
new file mode 100755
index 0000000..abebca1
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaNullableChangeInRequestValidator.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+import static java.util.Collections.singletonList;
+
+public class SchemaNullableChangeInRequestValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getNullable(), Boolean.FALSE);
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "nullable";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+    return ChangeRangeCheckUtils
+      .isNotViolated(leftProperty, rightProperty, singletonList(new Object[] { false, true }));
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return "仅允许false->true的修改";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaRequiredChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaRequiredChangeInRequestValidator.java
new file mode 100755
index 0000000..c090054
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaRequiredChangeInRequestValidator.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+import static java.util.Collections.emptyList;
+
+public class SchemaRequiredChangeInRequestValidator extends SchemaPropertyChangeValidator<List<String>> {
+
+  @Override
+  protected List<String> getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getRequired(), emptyList());
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "required";
+  }
+
+  @Override
+  protected boolean isAllowed(List<String> leftProperty, List<String> rightProperty) {
+    return leftProperty.containsAll(rightProperty);
+  }
+
+  @Override
+  protected String getMessage(List<String> leftProperty, List<String> rightProperty) {
+    return "不允许新增required字段";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaTypeFormatChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaTypeFormatChangeInRequestValidator.java
new file mode 100755
index 0000000..742e151
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaTypeFormatChangeInRequestValidator.java
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaTypeFormatChangeValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.TypeFormat;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+
+public class SchemaTypeFormatChangeInRequestValidator extends SchemaTypeFormatChangeValidator {
+
+  private static final List<Object[]> allowedChangedList;
+
+  static {
+    Object[][] allowedChange = new Object[][] {
+      new Object[] { new TypeFormat("integer", null), new TypeFormat("integer", "int64") },
+      new Object[] { new TypeFormat("integer", null), new TypeFormat("number", "double") },
+      new Object[] { new TypeFormat("integer", null), new TypeFormat("number", null) },
+
+      new Object[] { new TypeFormat("integer", "int32"), new TypeFormat("integer", "int64") },
+      new Object[] { new TypeFormat("integer", "int32"), new TypeFormat("integer", null) },
+      new Object[] { new TypeFormat("integer", "int32"), new TypeFormat("number", "float") },
+      new Object[] { new TypeFormat("integer", "int32"), new TypeFormat("number", "double") },
+      new Object[] { new TypeFormat("integer", "int32"), new TypeFormat("number", null) },
+
+      new Object[] { new TypeFormat("integer", "int64"), new TypeFormat("integer", null) },
+      new Object[] { new TypeFormat("integer", "int64"), new TypeFormat("number", "double") },
+      new Object[] { new TypeFormat("integer", "int64"), new TypeFormat("number", null) },
+
+      new Object[] { new TypeFormat("number", null), new TypeFormat("number", "double") },
+
+      new Object[] { new TypeFormat("number", "float"), new TypeFormat("number", null) },
+      new Object[] { new TypeFormat("number", "float"), new TypeFormat("number", "double") },
+
+      new Object[] { new TypeFormat("number", "double"), new TypeFormat("number", null) },
+
+      new Object[] { new TypeFormat("string", null), new TypeFormat("string", "password") },
+
+      new Object[] { new TypeFormat("string", "password"), new TypeFormat("string", null) },
+    };
+    allowedChangedList = Collections.unmodifiableList(Arrays.asList(allowedChange));
+  }
+
+  @Override
+  protected List<Object[]> getAllowedChangedList() {
+    return allowedChangedList;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInRequestBody(context) || isInParameter(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaUniqueItemsChangeInRequestValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaUniqueItemsChangeInRequestValidator.java
new file mode 100755
index 0000000..de69be0
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/request/SchemaUniqueItemsChangeInRequestValidator.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.request;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInParameter;
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInRequestBody;
+import static java.util.Collections.singletonList;
+
+public class SchemaUniqueItemsChangeInRequestValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return schema.getUniqueItems();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "uniqueItems";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+    return ChangeRangeCheckUtils
+      .isNotViolated(leftProperty, rightProperty, singletonList(new Object[] { true, false }));
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return "仅允许true->false的修改";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInParameter(context) || isInRequestBody(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaEnumChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaEnumChangeInResponseValidator.java
new file mode 100755
index 0000000..0656f83
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaEnumChangeInResponseValidator.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+import static java.util.Collections.emptyList;
+
+public class SchemaEnumChangeInResponseValidator extends SchemaPropertyChangeValidator<List> {
+
+  @Override
+  protected List getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getEnum(), emptyList());
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "enum";
+  }
+
+  @Override
+  protected boolean isAllowed(List leftProperty, List rightProperty) {
+    return leftProperty.containsAll(rightProperty);
+  }
+
+  @Override
+  protected String getMessage(List leftProperty, List rightProperty) {
+    return "不允许新增enum";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaExclusiveMaximumChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaExclusiveMaximumChangeInResponseValidator.java
new file mode 100755
index 0000000..5c0084d
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaExclusiveMaximumChangeInResponseValidator.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+import static java.util.Collections.singletonList;
+
+public class SchemaExclusiveMaximumChangeInResponseValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getExclusiveMaximum(), Boolean.FALSE);
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "exclusiveMaximum";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+
+    return ChangeRangeCheckUtils
+      .isNotViolated(leftProperty, rightProperty, singletonList(new Object[] { false, true }));
+
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return "仅允许false->true的修改";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaExclusiveMinimumChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaExclusiveMinimumChangeInResponseValidator.java
new file mode 100755
index 0000000..25ce187
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaExclusiveMinimumChangeInResponseValidator.java
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+import static java.util.Collections.singletonList;
+
+public class SchemaExclusiveMinimumChangeInResponseValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getExclusiveMinimum(), Boolean.FALSE);
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "exclusiveMinimum";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+
+    return ChangeRangeCheckUtils
+      .isNotViolated(leftProperty, rightProperty, singletonList(new Object[] { false, true }));
+
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return "仅允许false->true的修改";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaxItemsChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaxItemsChangeInResponseValidator.java
new file mode 100755
index 0000000..037bd3f
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaxItemsChangeInResponseValidator.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.*;
+
+public class SchemaMaxItemsChangeInResponseValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMaxItems();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "maxItems";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) <= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_LTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaxLengthChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaxLengthChangeInResponseValidator.java
new file mode 100755
index 0000000..9f292af
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaxLengthChangeInResponseValidator.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.*;
+
+public class SchemaMaxLengthChangeInResponseValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMaxLength();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "maxLength";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) <= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_LTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaxPropertiesChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaxPropertiesChangeInResponseValidator.java
new file mode 100755
index 0000000..77d7f3c
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaxPropertiesChangeInResponseValidator.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+
+public class SchemaMaxPropertiesChangeInResponseValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMaxProperties();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "maxProperties";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) <= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_LTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaximumChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaximumChangeInResponseValidator.java
new file mode 100755
index 0000000..65f8b88
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMaximumChangeInResponseValidator.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import java.math.BigDecimal;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+
+public class SchemaMaximumChangeInResponseValidator extends SchemaPropertyChangeValidator<BigDecimal> {
+
+  @Override
+  protected BigDecimal getProperty(Schema schema) {
+    return schema.getMaximum();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "maximum";
+  }
+
+  @Override
+  protected boolean isAllowed(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return rightProperty.compareTo(leftProperty) <= 0;
+  }
+
+  @Override
+  protected String getMessage(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return DiffViolationMessages.NEW_NOT_LTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinItemsChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinItemsChangeInResponseValidator.java
new file mode 100755
index 0000000..9823fdc
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinItemsChangeInResponseValidator.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+
+public class SchemaMinItemsChangeInResponseValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMinItems();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "minItems";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) >= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_GTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinLengthChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinLengthChangeInResponseValidator.java
new file mode 100755
index 0000000..461a32d
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinLengthChangeInResponseValidator.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+
+public class SchemaMinLengthChangeInResponseValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMinLength();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "minLength";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) >= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_GTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinPropertiesChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinPropertiesChangeInResponseValidator.java
new file mode 100755
index 0000000..eac3764
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinPropertiesChangeInResponseValidator.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+
+public class SchemaMinPropertiesChangeInResponseValidator extends SchemaPropertyChangeValidator<Integer> {
+
+  @Override
+  protected Integer getProperty(Schema schema) {
+    return schema.getMinProperties();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "minProperties";
+  }
+
+  @Override
+  protected boolean isAllowed(Integer leftProperty, Integer rightProperty) {
+    return rightProperty.compareTo(leftProperty) >= 0;
+  }
+
+  @Override
+  protected String getMessage(Integer leftProperty, Integer rightProperty) {
+    return DiffViolationMessages.NEW_NOT_GTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinimumChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinimumChangeInResponseValidator.java
new file mode 100755
index 0000000..055034c
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMinimumChangeInResponseValidator.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import java.math.BigDecimal;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.*;
+
+public class SchemaMinimumChangeInResponseValidator extends SchemaPropertyChangeValidator<BigDecimal> {
+
+  @Override
+  protected BigDecimal getProperty(Schema schema) {
+    return schema.getMinimum();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "minimum";
+  }
+
+  @Override
+  protected boolean isAllowed(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return rightProperty.compareTo(leftProperty) >= 0;
+  }
+
+  @Override
+  protected String getMessage(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return DiffViolationMessages.NEW_NOT_GTE_OLD;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMultipleOfChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMultipleOfChangeInResponseValidator.java
new file mode 100755
index 0000000..0614ecb
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaMultipleOfChangeInResponseValidator.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import java.math.BigDecimal;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+
+public class SchemaMultipleOfChangeInResponseValidator extends SchemaPropertyChangeValidator<BigDecimal> {
+
+  @Override
+  protected BigDecimal getProperty(Schema schema) {
+    return schema.getMultipleOf();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "multipleOf";
+  }
+
+  @Override
+  protected String getMessage(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return "新值必须==旧值或是旧值的倍数";
+  }
+
+  @Override
+  protected boolean isAllowed(BigDecimal leftProperty, BigDecimal rightProperty) {
+    return BigDecimal.ZERO.compareTo(rightProperty.divideAndRemainder(leftProperty)[1]) == 0;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaNullableChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaNullableChangeInResponseValidator.java
new file mode 100755
index 0000000..2c69efb
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaNullableChangeInResponseValidator.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+import static java.util.Collections.singletonList;
+
+public class SchemaNullableChangeInResponseValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getNullable(), Boolean.FALSE);
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "nullable";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+    return ChangeRangeCheckUtils
+      .isNotViolated(leftProperty, rightProperty, singletonList(new Object[] { true, false }));
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return "仅允许true->false的修改";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaRequiredChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaRequiredChangeInResponseValidator.java
new file mode 100755
index 0000000..7f64f45
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaRequiredChangeInResponseValidator.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.ObjectUtils;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+import static java.util.Collections.emptyList;
+
+public class SchemaRequiredChangeInResponseValidator extends SchemaPropertyChangeValidator<List<String>> {
+
+  @Override
+  protected List<String> getProperty(Schema schema) {
+    return ObjectUtils.defaultIfNull(schema.getRequired(), emptyList());
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "required";
+  }
+
+  @Override
+  protected boolean isAllowed(List<String> leftProperty, List<String> rightProperty) {
+    return rightProperty.containsAll(leftProperty);
+  }
+
+  @Override
+  protected String getMessage(List<String> leftProperty, List<String> rightProperty) {
+    return "不允许删除required字段";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaTypeFormatChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaTypeFormatChangeInResponseValidator.java
new file mode 100755
index 0000000..264c1c2
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaTypeFormatChangeInResponseValidator.java
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaTypeFormatChangeValidator;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.TypeFormat;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+
+public class SchemaTypeFormatChangeInResponseValidator extends SchemaTypeFormatChangeValidator {
+
+  private static final List<Object[]> allowedChangedList;
+
+  static {
+    Object[][] allowedChange = new Object[][] {
+      new Object[] { new TypeFormat("integer", null), new TypeFormat("integer", "int64") },
+      new Object[] { new TypeFormat("integer", null), new TypeFormat("integer", "int32") },
+
+      new Object[] { new TypeFormat("integer", "int64"), new TypeFormat("integer", null) },
+      new Object[] { new TypeFormat("integer", "int64"), new TypeFormat("integer", "int32") },
+
+      new Object[] { new TypeFormat("number", null), new TypeFormat("number", "double") },
+      new Object[] { new TypeFormat("number", null), new TypeFormat("number", "float") },
+
+      new Object[] { new TypeFormat("number", "double"), new TypeFormat("number", null) },
+      new Object[] { new TypeFormat("number", "double"), new TypeFormat("number", "float") },
+
+      new Object[] { new TypeFormat("string", null), new TypeFormat("string", "password") },
+
+      new Object[] { new TypeFormat("string", "password"), new TypeFormat("string", null) },
+    };
+    allowedChangedList = Collections.unmodifiableList(Arrays.asList(allowedChange));
+  }
+
+  @Override
+  protected List<Object[]> getAllowedChangedList() {
+    return allowedChangedList;
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaUniqueItemsChangeInResponseValidator.java b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaUniqueItemsChangeInResponseValidator.java
new file mode 100755
index 0000000..372dae7
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/main/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/schema/response/SchemaUniqueItemsChangeInResponseValidator.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.response;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffValidationContext;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.util.ChangeRangeCheckUtils;
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.schema.SchemaPropertyChangeValidator;
+import io.swagger.v3.oas.models.media.Schema;
+
+import static org.apache.servicecomb.toolkit.oasv.diffvalidation.util.OasDiffValidationContextUtils.isInResponse;
+import static java.util.Collections.singletonList;
+
+public class SchemaUniqueItemsChangeInResponseValidator extends SchemaPropertyChangeValidator<Boolean> {
+
+  @Override
+  protected Boolean getProperty(Schema schema) {
+    return schema.getUniqueItems();
+  }
+
+  @Override
+  protected String getPropertyName() {
+    return "uniqueItems";
+  }
+
+  @Override
+  protected boolean isAllowed(Boolean leftProperty, Boolean rightProperty) {
+    return ChangeRangeCheckUtils
+      .isNotViolated(leftProperty, rightProperty, singletonList(new Object[] { false, true }));
+  }
+
+  @Override
+  protected String getMessage(Boolean leftProperty, Boolean rightProperty) {
+    return "仅允许false->true的修改";
+  }
+
+  @Override
+  protected boolean needValidate(OasDiffValidationContext context) {
+    return isInResponse(context);
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/OasCompatibilityTestBase.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/OasCompatibilityTestBase.java
new file mode 100755
index 0000000..efbf135
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/OasCompatibilityTestBase.java
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.test.OasDiffValidatorTestBase;
+import io.swagger.v3.parser.core.models.ParseOptions;
+
+public class OasCompatibilityTestBase extends OasDiffValidatorTestBase {
+
+  @Override
+  protected ParseOptions createParseOptions() {
+
+    ParseOptions parseOptions = new ParseOptions();
+    parseOptions.setResolve(true);
+    parseOptions.setResolveCombinators(true);
+    parseOptions.setResolveFully(true);
+    parseOptions.setFlatten(false);
+    return parseOptions;
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAddNotAllowedDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAddNotAllowedDiffValidatorTest.java
new file mode 100755
index 0000000..b653655
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAddNotAllowedDiffValidatorTest.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.EncodingDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = EncodingAddNotAllowedDiffValidatorTest.TestConfiguration.class)
+public class EncodingAddNotAllowedDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-encoding-add-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-encoding-add-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolationRight(
+          DiffViolationMessages.OP_ADD_FORBIDDEN,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'bar'", ENCODING
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public EncodingDiffValidator encodingAddNotAllowedDiffValidator() {
+
+      return new EncodingAddNotAllowedDiffValidator();
+    }
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAllowedReservedChangeDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAllowedReservedChangeDiffValidatorTest.java
new file mode 100755
index 0000000..d9d640f
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingAllowedReservedChangeDiffValidatorTest.java
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.EncodingDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = EncodingAllowedReservedChangeDiffValidatorTest.TestConfiguration.class)
+public class EncodingAllowedReservedChangeDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-encoding-allow-reserved-a.yaml");
+    System.out.println(leftOpenAPI.toString());
+    OpenAPI rightOpenAPI = loadRelative("petstore-encoding-allow-reserved-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolation(
+          "仅允许false->true的修改",
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'foo'", ENCODING,
+            "allowReserved", null
+          },
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'foo'", ENCODING,
+            "allowReserved", null
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public EncodingDiffValidator encodingAllowedReservedChangeDiffValidator() {
+
+      return new EncodingAllowedReservedChangeDiffValidator();
+    }
+
+  }
+
+}
+
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingContentTypeNotSameDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingContentTypeNotSameDiffValidatorTest.java
new file mode 100755
index 0000000..b054967
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingContentTypeNotSameDiffValidatorTest.java
@@ -0,0 +1,88 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.EncodingDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = EncodingContentTypeNotSameDiffValidatorTest.TestConfiguration.class)
+public class EncodingContentTypeNotSameDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-encoding-content-type-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-encoding-content-type-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolation(
+          DiffViolationMessages.NEW_NOT_EQ_OLD,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'foo'", ENCODING,
+            "contentType", null
+          },
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'foo'", ENCODING,
+            "contentType", null
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public EncodingDiffValidator encodingContentTypeNotSameDiffValidator() {
+
+      return new EncodingContentTypeNotSameDiffValidator();
+    }
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingDelNotAllowedDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingDelNotAllowedDiffValidatorTest.java
new file mode 100755
index 0000000..444f667
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingDelNotAllowedDiffValidatorTest.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.EncodingDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = EncodingDelNotAllowedDiffValidatorTest.TestConfiguration.class)
+public class EncodingDelNotAllowedDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-encoding-del-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-encoding-del-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolationLeft(
+          DiffViolationMessages.OP_DEL_FORBIDDEN,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'bar'", ENCODING
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public EncodingDiffValidator encodingDelNotAllowedDiffValidator() {
+
+      return new EncodingDelNotAllowedDiffValidator();
+    }
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingExplodeNotSameDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingExplodeNotSameDiffValidatorTest.java
new file mode 100755
index 0000000..32659ed
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingExplodeNotSameDiffValidatorTest.java
@@ -0,0 +1,88 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.EncodingDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = EncodingExplodeNotSameDiffValidatorTest.TestConfiguration.class)
+public class EncodingExplodeNotSameDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-encoding-explode-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-encoding-explode-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolation(
+          DiffViolationMessages.NEW_NOT_EQ_OLD,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'foo'", ENCODING,
+            "explode", null
+          },
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'foo'", ENCODING,
+            "explode", null
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public EncodingDiffValidator encodingExplodeNotSameDiffValidator() {
+
+      return new EncodingExplodeNotSameDiffValidator();
+    }
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingStyleNotSameDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingStyleNotSameDiffValidatorTest.java
new file mode 100755
index 0000000..6cc0d44
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/encoding/EncodingStyleNotSameDiffValidatorTest.java
@@ -0,0 +1,88 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.encoding;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.EncodingDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = EncodingStyleNotSameDiffValidatorTest.TestConfiguration.class)
+public class EncodingStyleNotSameDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-encoding-style-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-encoding-style-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolation(
+          DiffViolationMessages.NEW_NOT_EQ_OLD,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'foo'", ENCODING,
+            "style", null
+          },
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'foo'", ENCODING,
+            "style", null
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public EncodingDiffValidator encodingStyleNotSameDiffValidator() {
+
+      return new EncodingStyleNotSameDiffValidator();
+    }
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderAddInRequestBodyNotAllowedDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderAddInRequestBodyNotAllowedDiffValidatorTest.java
new file mode 100755
index 0000000..77283fb
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderAddInRequestBodyNotAllowedDiffValidatorTest.java
@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.header;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.HeaderDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = HeaderAddInRequestBodyNotAllowedDiffValidatorTest.TestConfiguration.class)
+public class HeaderAddInRequestBodyNotAllowedDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-header-add-in-request-body-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-header-add-in-request-body-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolationRight(
+          DiffViolationMessages.OP_ADD_FORBIDDEN,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/x-www-form-urlencoded'", MEDIA_TYPE,
+            "encoding.'foo'", ENCODING,
+            "headers.'X-Foo'", HEADER
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public HeaderDiffValidator headerAddInRequestBodyNotAllowed() {
+
+      return new HeaderAddInRequestBodyNotAllowedDiffValidator();
+    }
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderDelInResponseNotAllowedDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderDelInResponseNotAllowedDiffValidatorTest.java
new file mode 100755
index 0000000..f5c9477
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/header/HeaderDelInResponseNotAllowedDiffValidatorTest.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.header;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.HeaderDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = HeaderDelInResponseNotAllowedDiffValidatorTest.TestConfiguration.class)
+public class HeaderDelInResponseNotAllowedDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-header-del-in-response-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-header-del-in-response-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolationLeft(
+          DiffViolationMessages.OP_DEL_FORBIDDEN,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "get", OPERATION,
+            "responses", RESPONSES,
+            "200", RESPONSE,
+            "headers.'X-Bar'", HEADER
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public HeaderDiffValidator headerDelInResponseNotAllowed() {
+
+      return new HeaderDelInResponseNotAllowedDiffValidator();
+    }
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeAddInParameterNotAllowedDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeAddInParameterNotAllowedDiffValidatorTest.java
new file mode 100755
index 0000000..24391c7
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeAddInParameterNotAllowedDiffValidatorTest.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.MediaTypeDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = MediaTypeAddInParameterNotAllowedDiffValidatorTest.TestConfiguration.class)
+public class MediaTypeAddInParameterNotAllowedDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-media-type-add-in-parameter-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-media-type-add-in-parameter-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolationRight(
+          DiffViolationMessages.OP_ADD_FORBIDDEN,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "get", OPERATION,
+            "parameters[0]", PARAMETER,
+            "content.'application/json'", MEDIA_TYPE
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public MediaTypeDiffValidator mediaTypeAddInParameterNotAllowedDiffValidator() {
+
+      return new MediaTypeAddInParameterNotAllowedDiffValidator();
+    }
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInParameterNotAllowedDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInParameterNotAllowedDiffValidatorTest.java
new file mode 100755
index 0000000..06b07cd
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInParameterNotAllowedDiffValidatorTest.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.MediaTypeDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = MediaTypeDelInParameterNotAllowedDiffValidatorTest.TestConfiguration.class)
+public class MediaTypeDelInParameterNotAllowedDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-media-type-del-in-parameter-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-media-type-del-in-parameter-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolationLeft(
+          DiffViolationMessages.OP_DEL_FORBIDDEN,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "get", OPERATION,
+            "parameters[0]", PARAMETER,
+            "content.'application/json'", MEDIA_TYPE
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public MediaTypeDiffValidator mediaTypeDelInParameterNotAllowedDiffValidator() {
+
+      return new MediaTypeDelInParameterNotAllowedDiffValidator();
+    }
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInRequestBodyNotAllowedDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInRequestBodyNotAllowedDiffValidatorTest.java
new file mode 100755
index 0000000..eb62a01
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInRequestBodyNotAllowedDiffValidatorTest.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.MediaTypeDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = MediaTypeDelInRequestBodyNotAllowedDiffValidatorTest.TestConfiguration.class)
+public class MediaTypeDelInRequestBodyNotAllowedDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-media-type-del-in-request-body-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-media-type-del-in-request-body-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolationLeft(
+          DiffViolationMessages.OP_DEL_FORBIDDEN,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "get", OPERATION,
+            "requestBody", REQUEST_BODY,
+            "content.'application/json'", MEDIA_TYPE
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public MediaTypeDiffValidator mediaTypeDelInRequestBodyNotAllowedDiffValidator() {
+
+      return new MediaTypeDelInRequestBodyNotAllowedDiffValidator();
+    }
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInResponseNotAllowedDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInResponseNotAllowedDiffValidatorTest.java
new file mode 100755
index 0000000..db8914a
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/mediatype/MediaTypeDelInResponseNotAllowedDiffValidatorTest.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.mediatype;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.MediaTypeDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = MediaTypeDelInResponseNotAllowedDiffValidatorTest.TestConfiguration.class)
+public class MediaTypeDelInResponseNotAllowedDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-media-type-del-in-response-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-media-type-del-in-response-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolationLeft(
+          DiffViolationMessages.OP_DEL_FORBIDDEN,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "get", OPERATION,
+            "responses", RESPONSES,
+            "200", RESPONSE,
+            "content.'application/xml'", MEDIA_TYPE
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public MediaTypeDiffValidator mediaTypeDelInResponseNotAllowedDiffValidator() {
+
+      return new MediaTypeDelInResponseNotAllowedDiffValidator();
+    }
+
+  }
+
+}
+
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationDeleteNotAllowedDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationDeleteNotAllowedDiffValidatorTest.java
new file mode 100755
index 0000000..8cfb32d
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationDeleteNotAllowedDiffValidatorTest.java
@@ -0,0 +1,74 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.toolkit.oasv.compatibility.validators.operation;
+
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.DiffViolationMessages;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OasDiffViolation;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.api.OperationDiffValidator;
+import org.apache.servicecomb.toolkit.oasv.diffvalidation.config.OasDiffValidatorsSkeletonConfiguration;
+
+import org.apache.servicecomb.toolkit.oasv.compatibility.validators.OasCompatibilityTestBase;
+import io.swagger.v3.oas.models.OpenAPI;
+import org.junit.Test;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.ContextConfiguration;
+
+import java.util.List;
+
+import static org.apache.servicecomb.toolkit.oasv.common.OasObjectType.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ContextConfiguration(classes = OperationDeleteNotAllowedDiffValidatorTest.TestConfiguration.class)
+public class OperationDeleteNotAllowedDiffValidatorTest extends OasCompatibilityTestBase {
+
+  @Test
+  public void validate() {
+    OpenAPI leftOpenAPI = loadRelative("petstore-operation-delete-a.yaml");
+    OpenAPI rightOpenAPI = loadRelative("petstore-operation-delete-b.yaml");
+    List<OasDiffViolation> violations = oasSpecDiffValidator
+      .validate(createContext(leftOpenAPI, rightOpenAPI), leftOpenAPI, rightOpenAPI);
+
+    assertThat(violations)
+      .containsExactlyInAnyOrder(
+        createViolationLeft(
+          DiffViolationMessages.OP_DEL_FORBIDDEN,
+          new Object[] {
+            "paths", PATHS,
+            "/pets", PATH_ITEM,
+            "post", OPERATION
+          }
+        )
+      );
+
+  }
+
+  @Configuration
+  @Import(OasDiffValidatorsSkeletonConfiguration.class)
+  public static class TestConfiguration {
+
+    @Bean
+    public OperationDiffValidator operationDeleteNotAllowedDiffValidator() {
+
+      return new OperationDeleteNotAllowedDiffValidator();
+    }
+
+  }
+
+}
diff --git a/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationIdNotSameDiffValidatorTest.java b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationIdNotSameDiffValidatorTest.java
new file mode 100755
index 0000000..981ca2b
--- /dev/null
+++ b/oas-validator/oas-validator-compatibility/src/test/java/org/apache/servicecomb/toolkit/oasv/compatibility/validators/operation/OperationIdNotSameDiffValidatorTest.java
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
... 32417 lines suppressed ...