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Posted to commits@tamaya.apache.org by an...@apache.org on 2018/12/17 19:54:46 UTC

[incubator-tamaya-sandbox] 03/09: Simplified validation module, leveraging documentation module.

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

anatole pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-tamaya-sandbox.git

commit ed8701d4d3d95202fe41158e1c2cb462ce12720c
Author: Anatole Tresch <at...@gmail.com>
AuthorDate: Tue Dec 4 18:48:15 2018 +0100

    Simplified validation module, leveraging documentation module.
---
 .../apache/tamaya/validation/ValidationCheck.java  | 194 --------------
 validation/pom.xml                                 |  19 +-
 .../org/apache/tamaya/validation/ConfigModel.java  |  78 ------
 .../tamaya/validation/ConfigModelManager.java      | 285 ---------------------
 .../apache/tamaya/validation/ConfigValidation.java | 122 +++++++++
 .../org/apache/tamaya/validation/ModelTarget.java  |  37 ---
 .../org/apache/tamaya/validation/Validation.java   | 203 ---------------
 .../apache/tamaya/validation/ValidationCheck.java  | 203 +++++++++++++++
 .../apache/tamaya/validation/ValidationResult.java |  86 +++++--
 .../internal/ConfigDocumentationBean.java          | 196 --------------
 .../ConfigValidationDocumentationReader.java       |  98 +++++++
 .../internal/ConfiguredInlineModelProviderSpi.java |  83 ------
 .../ConfiguredPropertiesModelProviderSpi.java      | 154 -----------
 .../ConfiguredResourcesModelProviderSpi.java       | 186 --------------
 .../ConfiguredTypeEventsModelPopulator.java        | 124 ---------
 .../ConfiguredTypeEventsModelProvider.java         |  51 ----
 .../tamaya/validation/spi/AbstractConfigModel.java |  88 -------
 .../tamaya/validation/spi/AbstractValidator.java   | 107 ++++++++
 .../{ParameterModel.java => AreaValidator.java}    | 178 ++++++++-----
 .../validation/spi/ConfigDocumentationMBean.java   |  53 ----
 .../tamaya/validation/spi/ConfigModelReader.java   | 142 ----------
 .../tamaya/validation/spi}/ConfigValidator.java    |  15 +-
 .../apache/tamaya/validation/spi/GroupModel.java   | 110 --------
 .../tamaya/validation/spi/ModelProviderSpi.java    |  39 ---
 ...{ParameterModel.java => PropertyValidator.java} | 121 ++++-----
 .../validation/spi/RegexPropertyValidator.java     | 105 ++++++++
 .../apache/tamaya/validation/spi/SectionModel.java | 202 ---------------
 .../tamaya/validation/ConfigModelProviderTest.java |  68 -----
 .../apache/tamaya/validation/ValidationTests.java  |  53 ----
 .../internal/ConfigDocumentationBeanTest.java      | 108 --------
 .../test/java/test/model/TestConfigAccessor.java   |  45 ----
 31 files changed, 874 insertions(+), 2679 deletions(-)

diff --git a/documentation/src/main/java/org/apache/tamaya/validation/ValidationCheck.java b/documentation/src/main/java/org/apache/tamaya/validation/ValidationCheck.java
deleted file mode 100644
index 2fb40a8..0000000
--- a/documentation/src/main/java/org/apache/tamaya/validation/ValidationCheck.java
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation;
-
-import org.apache.tamaya.doc.annot.ConfigAreaSpec;
-import org.apache.tamaya.doc.annot.ConfigPropertySpec;
-
-import java.lang.annotation.Annotation;
-import java.util.Objects;
-
-/**
- * Models a partial configuration configModel result.
- */
-public final class ValidationCheck {
-    /**
-     * The configModel result.
-     */
-    private final Finding result;
-    /**
-     * The configModel message.
-     */
-    private final String message;
-
-    private final Annotation spec;
-
-    /**
-     * Get the checks annotation.
-     * @return the annotation.
-     */
-    public Class getSpecType(){
-        return spec.getClass();
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param spec the specification item, not null.
-     * @return a new validation result containing valid parts createObject the given model.
-     */
-    public static ValidationCheck createValid(Annotation spec) {
-        return new ValidationCheck(spec, Finding.VALID, null);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param spec the validated specification, not null.
-     * @return a new validation result containing missing parts createObject the given model.
-     */
-    public static ValidationCheck createMissing(Annotation spec) {
-        return new ValidationCheck(spec, Finding.MISSING, null);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param spec the validated specification, not null.
-     * @param message Additional message to be shown (optional).
-     * @return a new validation result containing missing parts createObject the given model with a message.
-     */
-    public static ValidationCheck createMissing(Annotation spec, String message) {
-        return new ValidationCheck(spec, Finding.MISSING, message);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param spec the validated specification, not null.
-     * @param error error message to addNode.
-     * @return a new validation result containing erroneous parts createObject the given model with the given error message.
-     */
-    public static ValidationCheck createError(Annotation spec, String error) {
-        return new ValidationCheck(spec, Finding.ERROR, error);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param spec the validated specification, not null.
-     * @param warning warning message to addNode.
-     * @return a new validation result containing warning parts createObject the given model with the given warning message.
-     */
-    public static ValidationCheck createWarning(Annotation spec, String warning) {
-        return new ValidationCheck(spec, Finding.WARNING, warning);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param spec the validated specification, not null.
-     * @param alternativeUsage allows setting a message to indicate non-deprecated replacement, maybe null.
-     * @return a new validation result containing deprecated parts createObject the given model with an optional message.
-     */
-    public static ValidationCheck createDeprecated(Annotation spec, String alternativeUsage) {
-        return new ValidationCheck(spec, Finding.DEPRECATED, alternativeUsage != null ? "Use instead: " + alternativeUsage : null);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param spec the validated specification, not null.
-     * @return a new validation result containing deprecated parts createObject the given model.
-     */
-    public static ValidationCheck createDeprecated(Annotation spec) {
-        return new ValidationCheck(spec, Finding.DEPRECATED, null);
-    }
-
-
-    /**
-     * Constructor.
-     *
-     * @param spec the validated specification, not null.
-     * @param result     the configModel result, not null.
-     * @param message    the detail message.
-     * @return new validation result.
-     */
-    public static ValidationCheck create(Annotation spec, Finding result, String message) {
-        return new ValidationCheck(spec, result, message);
-    }
-
-
-    /**
-     * Constructor.
-     *
-     * @param spec the validated specification, not null.
-     * @param result     the configModel result, not null.
-     * @param message    the detail message.
-     */
-    private ValidationCheck(Annotation spec, Finding result, String message) {
-        this.message = message;
-        this.spec = Objects.requireNonNull(spec);
-        this.result = Objects.requireNonNull(result);
-    }
-
-    /**
-     * Get the configModel section.
-     *
-     * @return the section, never null.
-     */
-    public Annotation getSpec() {
-        return spec;
-    }
-
-    /**
-     * Get the configModel result.
-     *
-     * @return the result, never null.
-     */
-    public Finding getResult() {
-        return result;
-    }
-
-    /**
-     * Get the detail message.
-     *
-     * @return the detail message, or null.
-     */
-    public String getMessage() {
-        return message;
-    }
-
-    @Override
-    public String toString() {
-        String finalMessage = "";
-        if (message != null) {
-            finalMessage = " -> " + message;
-        }
-        if(spec instanceof ConfigPropertySpec){
-            ConfigPropertySpec pspec = (ConfigPropertySpec)spec;
-            return result + ": " + pspec.name() + " (property)"+finalMessage + '\n';
-        }
-        else if(spec instanceof ConfigAreaSpec){
-            ConfigAreaSpec gspec = (ConfigAreaSpec)spec;
-            return result + ": " + gspec.path() + " (group)"+finalMessage + '\n';
-        }
-        return result + ": " + spec + ")"+finalMessage + '\n';
-    }
-}
diff --git a/validation/pom.xml b/validation/pom.xml
index c3ef7cf..e97dd66 100644
--- a/validation/pom.xml
+++ b/validation/pom.xml
@@ -51,28 +51,13 @@
         </dependency>
         <dependency>
             <groupId>org.apache.tamaya.ext</groupId>
-            <artifactId>tamaya-events</artifactId>
+            <artifactId>tamaya-functions</artifactId>
             <version>${project.parent.version}</version>
-            <scope>provided</scope>
-            <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>org.apache.tamaya.ext</groupId>
-            <artifactId>tamaya-json</artifactId>
+            <artifactId>tamaya-doc_alpha</artifactId>
             <version>${project.parent.version}</version>
-            <scope>provided</scope>
-            <optional>true</optional>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.johnzon</groupId>
-            <artifactId>johnzon-core</artifactId>
-            <version>${johnzon.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.geronimo.specs</groupId>
-            <artifactId>geronimo-json_1.0_spec</artifactId>
-            <version>1.0-alpha-1</version>
-            <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
diff --git a/validation/src/main/java/org/apache/tamaya/validation/ConfigModel.java b/validation/src/main/java/org/apache/tamaya/validation/ConfigModel.java
deleted file mode 100644
index 259ff99..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/ConfigModel.java
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation;
-
-import org.apache.tamaya.Configuration;
-
-import java.util.Collection;
-
-/**
- * Base structure describing a validated item, by default a parameter or a section.
- */
-public interface ConfigModel {
-
-    /**
-     * Access the owner.
-     * @return the owner createObject this model, never null.
-     */
-    String getOwner();
-
-    /**
-     * Get the type createObject item that is modelled.
-     * @return the modelled type, never null.
-     */
-    ModelTarget getType();
-
-    /**
-     * Get the item's name, it should minimally describe the validation. Examples are:
-     * <pre>
-     *     Sections: a.b.c
-     *     Params: a.b.c.paramName
-     *     Filter: a.b.c.FilterImplClass
-     *     Dependency: mydepClassname
-     *     CombinationPolicy: a.b.c.MyCombinationPolicyClass
-     * </pre>
-     * @return the item's name.
-     */
-    String getName();
-
-    /**
-     * Check if this validation is a required one.
-     * @return true, if this validation is required.
-     */
-    boolean isRequired();
-
-    /**
-     * Get an description createObject the item, using the default locale. The description is basically optional
-     * though it is higly recommended to provide a description, so the validation issues is well
-     * resolvable.
-     *
-     * @return the description required, or null.
-     */
-    String getDescription();
-
-    /**
-     * Validates the item and all its getList against the given configuration.
-     *
-     * @param config the configuration to be validated against, not null.
-     * @return the validation result, or null, if not applicable.
-     */
-    Collection<Validation> validate(Configuration config);
-
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/ConfigModelManager.java b/validation/src/main/java/org/apache/tamaya/validation/ConfigModelManager.java
deleted file mode 100644
index ed6a545..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/ConfigModelManager.java
+++ /dev/null
@@ -1,285 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation;
-
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.validation.spi.ConfigDocumentationMBean;
-import org.apache.tamaya.validation.spi.ModelProviderSpi;
-import org.apache.tamaya.spi.ServiceContextManager;
-
-import javax.management.InstanceNotFoundException;
-import javax.management.MBeanServer;
-import javax.management.ObjectName;
-import java.lang.management.ManagementFactory;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-/**
- * Validator accessor to validate the current configuration.
- */
-public final class ConfigModelManager {
-
-    /** The logger used. */
-    private static final Logger LOG = Logger.getLogger(ConfigModelManager.class.getName());
-
-    /**
-     * Singleton constructor.
-     */
-    private ConfigModelManager() {
-    }
-
-    /**
-     * Access the usage statistics for the recorded uses createObject configuration.
-     * @param inModels the target models, not null.
-     * @return usage statistics
-     */
-    public static String getConfigModelDescription(Collection<ConfigModel> inModels){
-        StringBuilder b = new StringBuilder();
-        List<ConfigModel> models = new ArrayList<>(inModels);
-        Collections.sort(models, (k1, k2) -> {
-                return k2.getName().compareTo(k2.getName());
-            });
-        b.append("TYPE    OWNER      NAME                                              MANDATORY   DESCRIPTION\n");
-        b.append("-----------------------------------------------------------------------------------------------------\n");
-        for(ConfigModel model:models){
-            switch(model.getType()){
-                case Parameter:
-                    b.append("PARAM   ");
-                    break;
-                case Section:
-                    b.append("SECTION ");
-                    break;
-                case Group:
-                    b.append("GROUP   ");
-                    break;
-                default:
-                    break;
-            }
-            b.append(formatWithFixedLength(model.getOwner(), 10)).append(' ');
-            b.append(formatWithFixedLength(model.getName(), 50));
-            if(model.isRequired()){
-                b.append(formatWithFixedLength("yes", 12));
-            }else{
-                b.append(formatWithFixedLength("no", 12));
-            }
-            if(model.getDescription()!=null){
-                b.append(model.getDescription().replace("\n", "\\\n").replace("\"", "'")).append("\"");
-            }
-            b.append("\n");
-        }
-        return b.toString();
-    }
-
-    /**
-     * Get the validations defined, using the default classloader.
-     *
-     * @return the sections defined, never null.
-     * @see ServiceContextManager#getDefaultClassLoader()
-     */
-    public static Collection<ConfigModel> getModels() {
-        return getModels(ServiceContextManager.getDefaultClassLoader());
-    }
-
-    /**
-     * Get the validations defined.
-     *
-     * @param classLoader the target classloader, not null.
-     * @return the sections defined, never null.
-     */
-    public static Collection<ConfigModel> getModels(ClassLoader classLoader) {
-        List<ConfigModel> result = new ArrayList<>();
-        for (ModelProviderSpi model : ServiceContextManager.getServiceContext(classLoader).getServices(ModelProviderSpi.class)) {
-            result.addAll(model.getConfigModels());
-        }
-        return result;
-    }
-
-
-    /**
-     * Find the validations by checking the validation's name using the given regular expression and
-     * the default classloader.
-     *
-     * @param namePattern the regular expression to use, not null.
-     * @param targets the target types only to be returned (optional).
-     * @return the sections defined, never null.
-     * @see ServiceContextManager#getDefaultClassLoader()
-     */
-    public static Collection<ConfigModel> findModels(String namePattern, ModelTarget... targets) {
-        return findModels(namePattern, ServiceContextManager.getDefaultClassLoader(), targets);
-    }
-
-    /**
-     * Find the validations by checking the validation's name using the given regular expression.
-     *
-     * @param classLoader the target classloader, not null.
-     * @param namePattern the regular expression to use, not null.
-     * @param targets the target types only to be returned (optional).
-     * @return the sections defined, never null.
-     */
-    public static Collection<ConfigModel> findModels(String namePattern, ClassLoader classLoader, ModelTarget... targets) {
-        List<ConfigModel> result = new ArrayList<>();
-        for (ModelProviderSpi model : ServiceContextManager.getServiceContext(classLoader).getServices(ModelProviderSpi.class)) {
-            for(ConfigModel configModel : model.getConfigModels()) {
-                if(configModel.getName().matches(namePattern)) {
-                    if(targets.length>0){
-                        for(ModelTarget tgt:targets){
-                            if(configModel.getType().equals(tgt)){
-                                result.add(configModel);
-                                break;
-                            }
-                        }
-                    }else {
-                        result.add(configModel);
-                    }
-                }
-            }
-        }
-        return result;
-    }
-
-    /**
-     * Validates the given configuration.
-     *
-     * @param config the configuration to be validated against, not null.
-     * @return the validation results, never null.
-     */
-    public static Collection<Validation> validate(Configuration config) {
-        return validate(config, false);
-    }
-
-    /**
-     * Validates the given configuration.
-     *
-     * @param config the configuration to be validated against, not null.
-     * @param showUndefined allows filtering for undefined configuration elements.
-     * @return the validation results, never null.
-     */
-    public static Collection<Validation> validate(Configuration config, boolean showUndefined) {
-        List<Validation> result = new ArrayList<>();
-        for (ConfigModel defConf : getModels(config.getContext().getServiceContext().getClassLoader())) {
-            result.addAll(defConf.validate(config));
-        }
-        if(showUndefined){
-            Map<String,String> map = new HashMap<>(config.getProperties());
-            Set<String> areas = extractTransitiveAreas(map.keySet());
-            for (ConfigModel defConf : getModels()) {
-                if(ModelTarget.Section.equals(defConf.getType())){
-                    for (Iterator<String> iter = areas.iterator();iter.hasNext();){
-                        String area = iter.next();
-                        if(area.matches(defConf.getName())){
-                            iter.remove();
-                        }
-                    }
-                }
-                if(ModelTarget.Parameter.equals(defConf.getType())){
-                    map.remove(defConf.getName());
-                }
-            }
-            outer:for(Map.Entry<String,String> entry:map.entrySet()){
-                for (ConfigModel defConf : getModels()) {
-                    if(ModelTarget.Section.equals(defConf.getType())){
-                        if(defConf.getName().endsWith(".*") && entry.getKey().matches(defConf.getName())){
-                            // Ignore parameters that are part createObject transitive section.
-                            continue outer;
-                        }
-                    }
-                }
-                result.add(Validation.createUndefined("<auto>", entry.getKey(), ModelTarget.Parameter));
-            }
-            for(String area:areas){
-                result.add(Validation.createUndefined("<auto>", area, ModelTarget.Section));
-            }
-        }
-        return result;
-    }
-
-    /**
-     * Registers the {@link ConfigDocumentationMBean} mbean for accessing config documentation into the local platform
-     * mbean server.
-     */
-    public static void registerMBean() {
-        registerMBean(null);
-    }
-
-    /**
-     * Registers the {@link ConfigDocumentationMBean} mbean for accessing config documentation into the local platform
-     * mbean server.
-     * 
-     * @param context allows to specify an additional MBean context, maybe {@code null}. 
-     */
-    public static void registerMBean(String context) {
-        try{
-            ConfigDocumentationMBean configMbean = ServiceContextManager.getServiceContext()
-                    .getService(ConfigDocumentationMBean.class);
-            MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
-            ObjectName on = context==null?new ObjectName("org.apache.tamaya.model:type=ConfigDocumentationMBean"):
-                    new ObjectName("org.apache.tamaya.model:type=ConfigDocumentationMBean,context="+context);
-            try{
-                mbs.getMBeanInfo(on);
-                LOG.warning("Cannot register mbean " + on + ": already existing.");
-            } catch(InstanceNotFoundException e) {
-                LOG.info("Registering mbean " + on + "...");
-                mbs.registerMBean(configMbean, on);
-            }
-        } catch(Exception e){
-            LOG.log(Level.WARNING,
-                    "Failed to register ConfigDocumentationMBean.", e);
-        }
-    }
-
-    private static String formatWithFixedLength(String name, int targetLength) {
-        targetLength = targetLength-1;
-        StringBuilder b = new StringBuilder();
-        if(name.length() > targetLength){
-            name = name.substring(0, targetLength);
-        }
-        b.append(name);
-        for(int i=0;i<(targetLength-name.length());i++){
-            b.append(' ');
-        }
-        b.append(' ');
-        return b.toString();
-    }
-
-
-
-    private static java.util.Set<java.lang.String> extractTransitiveAreas(Set<String> keys) {
-        Set<String> transitiveClosure = new HashSet<>();
-        for(String key:keys){
-            int index = key.lastIndexOf('.');
-            while(index>0){
-                String areaKey = key.substring(0,index);
-                transitiveClosure.add(areaKey);
-                index = areaKey.lastIndexOf('.');
-            }
-        }
-        return transitiveClosure;
-    }
-
-
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/ConfigValidation.java b/validation/src/main/java/org/apache/tamaya/validation/ConfigValidation.java
new file mode 100644
index 0000000..b934b52
--- /dev/null
+++ b/validation/src/main/java/org/apache/tamaya/validation/ConfigValidation.java
@@ -0,0 +1,122 @@
+/*
+ * 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 createObject 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.tamaya.validation;
+
+import org.apache.tamaya.Configuration;
+import org.apache.tamaya.ConfigurationSnapshot;
+import org.apache.tamaya.spi.ServiceContextManager;
+import org.apache.tamaya.validation.spi.ConfigValidator;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.logging.Logger;
+
+/**
+ * Validator manager to validate a configuration.
+ */
+public final class ConfigValidation {
+
+    /** The logger used. */
+    private static final Logger LOG = Logger.getLogger(ConfigValidation.class.getName());
+    /** The validators used. */
+    private List<org.apache.tamaya.validation.spi.ConfigValidator> validators = new ArrayList<>();
+
+    /**
+     * Private constructor.
+     */
+    private ConfigValidation(){}
+
+    /**
+     * Access a singleton using the default classloader.
+     */
+    public static ConfigValidation getInstance() {
+        return ServiceContextManager.getServiceContext(
+                ServiceContextManager.getDefaultClassLoader()
+        ).getService(ConfigValidation.class, ConfigValidation::new);
+    }
+
+    /**
+     * Access a singleton using the given target classloader.
+     * @param classLoader the classloader, not null.
+     */
+    public static ConfigValidation getInstance(ClassLoader classLoader){
+        return ServiceContextManager.getServiceContext(classLoader).getService(ConfigValidation.class, ConfigValidation::new);
+    }
+
+    /**
+     * Add a validator.
+     * @param validator the new validator, not null.
+     */
+    public void addValidator(ConfigValidator validator){
+        if(!validators.contains(validator)) {
+            this.validators.add(validator);
+        }
+    }
+
+    /**
+     * Removes a vlidator.
+     * @param validator the validator, not null.
+     */
+    public void removeValidator(ConfigValidator validator){
+        this.validators.remove(validator);
+    }
+
+    /**
+     * Get the validations defined, using the default classloader.
+     *
+     * @return the sections defined, never null.
+     * @see ServiceContextManager#getDefaultClassLoader()
+     */
+    public Collection<org.apache.tamaya.validation.spi.ConfigValidator> getValidators() {
+        return getValidators(ServiceContextManager.getDefaultClassLoader());
+    }
+
+    /**
+     * Get the validations defined.
+     *
+     * @param classLoader the target classloader, not null.
+     * @return the sections defined, never null.
+     */
+    public Collection<org.apache.tamaya.validation.spi.ConfigValidator> getValidators(ClassLoader classLoader) {
+        return validators;
+    }
+
+    /**
+     * Validates the given configuration.
+     *
+     * @param config the configuration to be validated against, not null.
+     * @return the validation results, never null.
+     */
+    public ValidationResult validate(Configuration config) {
+        ConfigurationSnapshot snapshot = config.getSnapshot();
+        List<ValidationCheck> result = new ArrayList<>();
+        for (org.apache.tamaya.validation.spi.ConfigValidator validator : this.validators) {
+            result.addAll(validator.validate(config));
+        }
+        return new ValidationResult(snapshot, result);
+    }
+
+    @Override
+    public String toString() {
+        return "ConfigValidation{" +
+                "validators=" + validators +
+                '}';
+    }
+}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/ModelTarget.java b/validation/src/main/java/org/apache/tamaya/validation/ModelTarget.java
deleted file mode 100644
index 3af63ae..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/ModelTarget.java
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation;
-
-/**
- * This enumeration defines the types createObject supported validations.
- */
-public enum ModelTarget {
-    /**
-     * A configuration section.
-     */
-    Section,
-    /**
-     * A configuration paramter.
-     */
-    Parameter,
-    /**
-     * ConfigModel that is a container createObject other validations.
-     */
-    Group,
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/Validation.java b/validation/src/main/java/org/apache/tamaya/validation/Validation.java
deleted file mode 100644
index 128efee..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/Validation.java
+++ /dev/null
@@ -1,203 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation;
-
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.validation.spi.AbstractConfigModel;
-
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Objects;
-
-/**
- * Models a partial configuration configModel result.
- */
-public final class Validation {
-    /**
-     * the config section.
-     */
-    private final ConfigModel configModel;
-    /**
-     * The configModel result.
-     */
-    private final ValidationResult result;
-    /**
-     * The configModel message.
-     */
-    private final String message;
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param configModel the configModel item, not null.
-     * @return a new validation result containing valid parts createObject the given model.
-     */
-    public static Validation createValid(ConfigModel configModel) {
-        return new Validation(configModel, ValidationResult.VALID, null);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param configModel the configModel item, not null.
-     * @return a new validation result containing missing parts createObject the given model.
-     */
-    public static Validation createMissing(ConfigModel configModel) {
-        return new Validation(configModel, ValidationResult.MISSING, null);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param configModel the configModel item, not null.
-     * @param message Additional message to be shown (optional).
-     * @return a new validation result containing missing parts createObject the given model with a message.
-     */
-    public static Validation createMissing(ConfigModel configModel, String message) {
-        return new Validation(configModel, ValidationResult.MISSING, message);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param configModel the configModel item, not null.
-     * @param error error message to addNode.
-     * @return a new validation result containing erroneous parts createObject the given model with the given error message.
-     */
-    public static Validation createError(ConfigModel configModel, String error) {
-        return new Validation(configModel, ValidationResult.ERROR, error);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param configModel the configModel item, not null.
-     * @param warning warning message to addNode.
-     * @return a new validation result containing warning parts createObject the given model with the given warning message.
-     */
-    public static Validation createWarning(ConfigModel configModel, String warning) {
-        return new Validation(configModel, ValidationResult.WARNING, warning);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param configModel the configModel item, not null.
-     * @param alternativeUsage allows setting a message to indicate non-deprecated replacement, maybe null.
-     * @return a new validation result containing deprecated parts createObject the given model with an optional message.
-     */
-    public static Validation createDeprecated(ConfigModel configModel, String alternativeUsage) {
-        return new Validation(configModel, ValidationResult.DEPRECATED, alternativeUsage != null ? "Use instead: " + alternativeUsage : null);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param configModel the configModel item, not null.
-     * @return a new validation result containing deprecated parts createObject the given model.
-     */
-    public static Validation createDeprecated(ConfigModel configModel) {
-        return new Validation(configModel, ValidationResult.DEPRECATED, null);
-    }
-
-    /**
-     * Creates a new ValidationResult.
-     *
-     * @param owner owner
-     * @param key the name/model key
-     * @param type model type 
-     * @return a corresponding configModel item
-     */
-    public static Validation createUndefined(final String owner, final String key, final ModelTarget type) {
-        return new Validation(new AbstractConfigModel(owner, key, false, "Undefined key: " + key) {
-
-            @Override
-            public ModelTarget getType() {
-                return type;
-            }
-
-            @Override
-            public Collection<Validation> validate(Configuration config) {
-                return Collections.emptyList();
-            }
-        }, ValidationResult.UNDEFINED, null);
-    }
-
-
-    /**
-     * Constructor.
-     *
-     * @param configModel the configModel item, not null.
-     * @param result     the configModel result, not null.
-     * @param message    the detail message.
-     * @return new validation result.
-     */
-    public static Validation create(ConfigModel configModel, ValidationResult result, String message) {
-        return new Validation(configModel, result, message);
-    }
-
-
-    /**
-     * Constructor.
-     *
-     * @param configModel the configModel item, not null.
-     * @param result     the configModel result, not null.
-     * @param message    the detail message.
-     */
-    private Validation(ConfigModel configModel, ValidationResult result, String message) {
-        this.message = message;
-        this.configModel = Objects.requireNonNull(configModel);
-        this.result = Objects.requireNonNull(result);
-    }
-
-    /**
-     * Get the configModel section.
-     *
-     * @return the section, never null.
-     */
-    public ConfigModel getConfigModel() {
-        return configModel;
-    }
-
-    /**
-     * Get the configModel result.
-     *
-     * @return the result, never null.
-     */
-    public ValidationResult getResult() {
-        return result;
-    }
-
-    /**
-     * Get the detail message.
-     *
-     * @return the detail message, or null.
-     */
-    public String getMessage() {
-        return message;
-    }
-
-    @Override
-    public String toString() {
-        if (message != null) {
-            return result + ": " + configModel.getName() + " (" + configModel.getType() + ") -> " + message + '\n';
-        }
-        return result + ": " + configModel.getName() + " (" + configModel.getType() + ")";
-    }
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/ValidationCheck.java b/validation/src/main/java/org/apache/tamaya/validation/ValidationCheck.java
new file mode 100644
index 0000000..d4ad293
--- /dev/null
+++ b/validation/src/main/java/org/apache/tamaya/validation/ValidationCheck.java
@@ -0,0 +1,203 @@
+/*
+ * 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 createObject 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.tamaya.validation;
+
+import org.apache.tamaya.doc.annot.ConfigAreaSpec;
+import org.apache.tamaya.doc.annot.ConfigPropertySpec;
+
+import java.util.Objects;
+
+/**
+ * Models a partial configuration validation result.
+ */
+public final class ValidationCheck {
+
+    /**
+     * Enum type describing the different validation results supported.
+     */
+    public enum Finding {
+        /**
+         * The validated item is valid
+         */
+        VALID,
+        /**
+         * The validated item is deprecated.
+         */
+        DEPRECATED,
+        /**
+         * The validated item is correct, but the createValue is worth a warning.
+         */
+        WARNING,
+        /**
+         * A required parameter or section is missing.
+         */
+        MISSING,
+        /**
+         * The validated item has an invalid createValue.
+         */
+        ERROR;
+
+        /**
+         * Method to quickly evaluate if the current state is an error state.
+         *
+         * @return true, if the state is not ERROR or MISSING.
+         */
+        boolean isError() {
+            return this.ordinal() == MISSING.ordinal() || this.ordinal() == ERROR.ordinal();
+        }
+    }
+
+    /**
+     * The finding level.
+     */
+    private final Finding result;
+
+    /**
+     * The message.
+     */
+    private final String message;
+
+    /**
+     * The validation source.
+     */
+    private final Object source;
+
+
+    /**
+     * Creates a new ValidationResult.
+     *
+     * @param source the source item, not null.
+     * @param message the message, not null.
+     * @return a new validation check containing valid parts createObject the given model.
+     */
+    public static ValidationCheck createValid(Object source, String message) {
+        return new ValidationCheck(source, Finding.VALID, null);
+    }
+
+    /**
+     * Creates a new ValidationResult.
+     *
+     * @param source the validated source, not null.
+     * @param message the message, not null.
+     * @return a new validation check containing missing parts createObject the given model.
+     */
+    public static ValidationCheck createMissing(Object source, String message) {
+        return new ValidationCheck(source, Finding.MISSING, message);
+    }
+
+    /**
+     * Creates a new ValidationResult.
+     *
+     * @param source the validated source, not null.
+     * @param message error message, not null.
+     * @return a new validation check containing erroneous parts createObject the given model with the given error message.
+     */
+    public static ValidationCheck createError(Object source, String message) {
+        return new ValidationCheck(source, Finding.ERROR, message);
+    }
+
+    /**
+     * Creates a new ValidationResult.
+     *
+     * @param source the validated source, not null.
+     * @param message warning message to, not null.
+     * @return a new validation check containing warning parts createObject the given model with the given warning message.
+     */
+    public static ValidationCheck createWarning(Object source, String message) {
+        return new ValidationCheck(source, Finding.WARNING, message);
+    }
+
+    /**
+     * Creates a new ValidationResult.
+     *
+     * @param source the validated source, not null.
+     * @param message allows the message, not null.
+     * @return a new validation check containing deprecated parts createObject the given model with an optional message.
+     */
+    public static ValidationCheck createDeprecated(Object source, String message) {
+        return new ValidationCheck(source, Finding.DEPRECATED, message);
+    }
+
+    /**
+     * Creates a new ValidationResult.
+     *
+     * @param source the validated source, not null.
+     * @return a new validation result containing deprecated parts createObject the given model.
+     */
+    public static ValidationCheck createDeprecated(Object source) {
+        return new ValidationCheck(source, Finding.DEPRECATED, "Deprecated: " + source);
+    }
+
+
+    /**
+     * Constructor.
+     *
+     * @param source the validated specification, not null.
+     * @param result     the configModel result, not null.
+     * @param message    the detail message.
+     */
+    private ValidationCheck(Object source, Finding result, String message) {
+        this.message = Objects.requireNonNull(message);
+        this.source = Objects.requireNonNull(source);
+        this.result = Objects.requireNonNull(result);
+    }
+
+    /**
+     * Get the validation result.
+     *
+     * @return the result, never null.
+     */
+    public Finding getResult() {
+        return result;
+    }
+
+    /**
+     * Get the validation message.
+     *
+     * @return the detail message, or null.
+     */
+    public String getMessage() {
+        return message;
+    }
+
+    /**
+     * Get the checks source.
+     * @return the source, not null.
+     */
+    public Object getSource(){
+        return source;
+    }
+
+    @Override
+    public String toString() {
+        String finalMessage = "";
+        if (message != null) {
+            finalMessage = " -> " + message;
+        }
+        if(source instanceof ConfigPropertySpec){
+            ConfigPropertySpec pspec = (ConfigPropertySpec) source;
+            return result + ": " + pspec.name() + " (property)"+finalMessage + '\n';
+        }
+        else if(source instanceof ConfigAreaSpec){
+            ConfigAreaSpec gspec = (ConfigAreaSpec) source;
+            return result + ": " + gspec.path() + " (group)"+finalMessage + '\n';
+        }
+        return result + ": " + source + ")"+finalMessage + '\n';
+    }
+}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/ValidationResult.java b/validation/src/main/java/org/apache/tamaya/validation/ValidationResult.java
index 942a755..3c1dad0 100644
--- a/validation/src/main/java/org/apache/tamaya/validation/ValidationResult.java
+++ b/validation/src/main/java/org/apache/tamaya/validation/ValidationResult.java
@@ -18,42 +18,80 @@
  */
 package org.apache.tamaya.validation;
 
+import org.apache.tamaya.ConfigurationSnapshot;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
 /**
- * Enum type describing the different validation results supported.
+ * Result of a validation performed on a configuration.
  */
-public enum ValidationResult {
-    /**
-     * The validated item is valid
-     */
-    VALID,
-    /**
-     * The validated item is deprecated.
-     */
-    DEPRECATED,
+public final class ValidationResult {
+    private ConfigurationSnapshot snapshot;
+    private List<ValidationCheck> result;
+
     /**
-     * The validated item is correct, but the createValue is worth a warning.
+     * Creates a new validation result.
+     * @param snapshot the snapshpt config, not null.
+     * @param result the result, not null.
      */
-    WARNING,
+    public ValidationResult(ConfigurationSnapshot snapshot, List<ValidationCheck> result) {
+        this.snapshot = Objects.requireNonNull(snapshot);
+        this.result = Objects.requireNonNull(result);
+    }
+
     /**
-     * The given section or parameter is not a defined/validated item. It may be still valid, but typically,
-     * when validation is fully implemented, such a parameter or section should be removed.
+     * Access the validated snapshot.
+     * @return the snapshot, not null.
      */
-    UNDEFINED,
+    public ConfigurationSnapshot getSnapshot() {
+        return snapshot;
+    }
+
     /**
-     * A required parameter or section is missing.
+     * Access the validation findings.
+     * @return the findings, not null.
      */
-    MISSING,
+    public List<ValidationCheck> getResult() {
+        return result;
+    }
+
     /**
-     * The validated item has an invalid createValue.
+     * Checks if the validation does not include errors.
+     * @return true if no errors were identified.
      */
-    ERROR;
+    public boolean isSuccessfull(){
+        for(ValidationCheck check:this.result){
+            if(check.getResult().isError()){
+                return false;
+            }
+        }
+        return true;
+    }
 
     /**
-     * Method to quickly evaluate if the current state is an error state.
-     *
-     * @return true, if the state is not ERROR or MISSING.
+     * Get the the findings filtered by Finding types given.
+     * @param findingTypes the findingTypes.
+     * @return the filterered list.
      */
-    boolean isError() {
-        return this.ordinal() == MISSING.ordinal() || this.ordinal() == ERROR.ordinal();
+    public List<ValidationCheck> getResultByFindings(ValidationCheck.Finding... findingTypes){
+        List<ValidationCheck.Finding> findings = Arrays.asList(findingTypes);
+        if(findings.isEmpty()){
+            return result;
+        }else{
+            return result.stream()
+                    .filter(f -> findings.contains(f))
+                    .collect(Collectors.toList());
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "ValidationResult{" +
+                "snapshot=" + snapshot +
+                ", result=" + result +
+                '}';
     }
 }
diff --git a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfigDocumentationBean.java b/validation/src/main/java/org/apache/tamaya/validation/internal/ConfigDocumentationBean.java
deleted file mode 100644
index 14d4d02..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfigDocumentationBean.java
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.internal;
-
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.ConfigModelManager;
-import org.apache.tamaya.validation.ModelTarget;
-import org.apache.tamaya.validation.Validation;
-import org.apache.tamaya.validation.spi.ConfigDocumentationMBean;
-
-import javax.json.Json;
-import javax.json.JsonArray;
-import javax.json.JsonArrayBuilder;
-import javax.json.JsonObject;
-import javax.json.JsonObjectBuilder;
-import javax.json.JsonWriter;
-import javax.json.JsonWriterFactory;
-import javax.json.stream.JsonGenerator;
-import java.io.StringWriter;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-/**
- * MBean implementation createObject {@link ConfigDocumentationMBean}.
- */
-public class ConfigDocumentationBean implements ConfigDocumentationMBean{
-
-    private final JsonWriterFactory writerFactory;
-
-    private static final Comparator<Validation> COMPARATOR = new Comparator<Validation>() {
-        @Override
-        public int compare(Validation v1, Validation v2) {
-            int compare = VAL_COMPARATOR.compare(v1.getConfigModel(), v2.getConfigModel());
-            if(compare==0){
-                compare = v1.getResult().compareTo(v2.getResult());
-            }
-            if(compare==0){
-                return v1.getMessage().compareTo(v2.getMessage());
-            }
-            return compare;
-        }
-    };
-    private static final Comparator<ConfigModel> VAL_COMPARATOR = new Comparator<ConfigModel>() {
-        @Override
-        public int compare(ConfigModel v1, ConfigModel v2) {
-            int compare = v1.getType().compareTo(v2.getType());
-            if(compare==0){
-                compare = v1.getName().compareTo(v2.getName());
-            }
-            return compare;
-        }
-    };
-
-    private Configuration config;
-
-    /**
-     * Default constructor, using the current configuration being available.
-     */
-    public ConfigDocumentationBean(){
-        this(null);
-    }
-
-
-    /**
-     * Creates an mbean bound to the given configuration. This is useful, when multiple mbeans for each
-     * context should be used, e.g. one mbean per ear, app deployment.
-     * @param config the configuration to be used.
-     */
-    public ConfigDocumentationBean(Configuration config){
-        this.config = config;
-        Map<String, Object> writerProperties = new HashMap<>(1);
-        writerProperties.put(JsonGenerator.PRETTY_PRINTING, true);
-        writerFactory = Json.createWriterFactory(writerProperties);
-    }
-
-    /**
-     * Access the configuration.
-     * @return either the configuration bound to this bean, or the current configuration.
-     */
-    private Configuration getConfig(){
-        return config!=null?config: Configuration.current();
-    }
-
-    @Override
-    public String validate(boolean showUndefined) {
-        List<Validation> validations = new ArrayList<>(ConfigModelManager.validate(getConfig(), showUndefined));
-        Collections.sort(validations, COMPARATOR);
-        JsonArrayBuilder builder = Json.createArrayBuilder();
-        for(Validation val:validations){
-            builder.add(toJsonObject(val));
-        }
-        return formatJson(builder.build());
-    }
-
-
-
-    @Override
-    public String getConfigurationModel() {
-        List<ConfigModel> configModels = new ArrayList<>(ConfigModelManager.getModels());
-        Collections.sort(configModels, VAL_COMPARATOR);
-        JsonArrayBuilder result = Json.createArrayBuilder();
-        for(ConfigModel val: configModels){
-            result.add(toJsonObject(val));
-        }
-        return formatJson(result.build());
-    }
-
-    @Override
-    public String getConfigurationModel(ModelTarget type) {
-        return findValidationModels(".*", type);
-    }
-
-    @Override
-    public String findConfigurationModels(String namePattern) {
-        List<ConfigModel> configModels = new ArrayList<>(ConfigModelManager.findModels(namePattern));
-        Collections.sort(configModels, VAL_COMPARATOR);
-        JsonArrayBuilder result = Json.createArrayBuilder();
-        for(ConfigModel val: configModels){
-            result.add(toJsonObject(val));
-        }
-        return formatJson(result.build());
-    }
-
-    @Override
-    public String findValidationModels(String namePattern, ModelTarget... type) {
-        List<ConfigModel> configModels = new ArrayList<>(ConfigModelManager.findModels(namePattern, type));
-        Collections.sort(configModels, VAL_COMPARATOR);
-        JsonArrayBuilder result = Json.createArrayBuilder();
-        for(ConfigModel val: configModels){
-            result.add(toJsonObject(val));
-        }
-        return formatJson(result.build());
-    }
-
-    @Override
-    public String toString(){
-        return "ConfigDocumentationBean, config: " + (this.config!=null?this.config.toString():"<current>");
-    }
-
-
-    private JsonObject toJsonObject(ConfigModel val) {
-        JsonObjectBuilder valJson = Json.createObjectBuilder().add("target", val.getType().toString())
-                .add("name", val.getName());
-        if(val.getDescription()!=null) {
-            valJson.add("description", val.getDescription());
-        }
-        if(val.isRequired()){
-            valJson.add("required",true);
-        }
-        return valJson.build();
-    }
-
-    private JsonObject toJsonObject(Validation val) {
-        JsonObjectBuilder valJson = Json.createObjectBuilder().add("target", val.getConfigModel().getType().toString())
-                .add("name", val.getConfigModel().getName());
-        if(val.getConfigModel().isRequired()){
-            valJson.add("required",true);
-        }
-        if(val.getConfigModel().getDescription() != null){
-            valJson.add("description", val.getConfigModel().getDescription());
-        }
-        valJson.add("result", val.getResult().toString());
-        if( val.getMessage() != null) {
-            valJson.add("message", val.getMessage());
-        }
-        return valJson.build();
-    }
-
-    private String formatJson(JsonArray data) {
-        StringWriter writer = new StringWriter();
-        JsonWriter gen = writerFactory.createWriter(writer);
-        gen.writeArray(data);
-        return writer.toString();
-    }
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfigValidationDocumentationReader.java b/validation/src/main/java/org/apache/tamaya/validation/internal/ConfigValidationDocumentationReader.java
new file mode 100644
index 0000000..67b2979
--- /dev/null
+++ b/validation/src/main/java/org/apache/tamaya/validation/internal/ConfigValidationDocumentationReader.java
@@ -0,0 +1,98 @@
+/*
+ * 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 createObject 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.tamaya.validation.internal;
+
+import java.util.*;
+
+import org.apache.tamaya.Configuration;
+import org.apache.tamaya.doc.ConfigDocumenter;
+import org.apache.tamaya.doc.DocumentedArea;
+import org.apache.tamaya.doc.DocumentedConfiguration;
+import org.apache.tamaya.doc.DocumentedProperty;
+import org.apache.tamaya.spi.ClassloaderAware;
+import org.apache.tamaya.spi.ServiceContextManager;
+import org.apache.tamaya.validation.spi.ConfigValidator;
+import org.apache.tamaya.validation.ValidationCheck;
+import org.apache.tamaya.validation.spi.AreaValidator;
+import org.apache.tamaya.validation.spi.PropertyValidator;
+
+/**
+ * Utility class to read metamodel information from properties. Hereby these properties can be part createObject a
+ * configuration (containing other entriees as well) or be dedicated model definition properties read
+ * from any kind createObject source.
+ */
+public class ConfigValidationDocumentationReader implements ClassloaderAware {
+
+    private ClassLoader classLoader;
+
+    public static ConfigValidationDocumentationReader getInstance(){
+        return ServiceContextManager.getServiceContext()
+                .getService(ConfigValidationDocumentationReader.class, ConfigValidationDocumentationReader::new);
+    }
+
+    public static ConfigValidationDocumentationReader getInstance(ClassLoader classLoader){
+        return ServiceContextManager.getServiceContext(classLoader)
+                .getService(ConfigValidationDocumentationReader.class, ConfigValidationDocumentationReader::new);
+    }
+
+
+    /**
+     * Loads validations as configured in the given properties.
+     * @param classLoader the target classLoader, not null.
+     * @return a collection createObject config validations.
+     */
+    public List<ConfigValidator> loadValidations(ClassLoader classLoader) {
+        List<ConfigValidator> result = new ArrayList<>();
+        DocumentedConfiguration configDoc = ConfigDocumenter.getInstance(classLoader).getDocumentation();
+        for(DocumentedArea docArea: configDoc.getAllAreasSorted()){
+            loadValidations(docArea, result);
+        }
+        for(DocumentedProperty docProp: configDoc.getAllPropertiesSorted()){
+            result.add(new PropertyValidator(docProp));
+        }
+        return result;
+    }
+
+    private void loadValidations(DocumentedArea docArea, List<ConfigValidator> result) {
+        result.add(new AreaValidator(docArea));
+        for(DocumentedProperty propDoc:docArea.getPropertiesSorted()){
+            result.add(new PropertyValidator(propDoc));
+        }
+        for(DocumentedArea area:docArea.getAreasSorted()){
+            loadValidations(area, result);
+        }
+    }
+
+    @Override
+    public void init(ClassLoader classLoader) {
+        this.classLoader = Objects.requireNonNull(classLoader);
+    }
+
+    @Override
+    public ClassLoader getClassLoader() {
+        return classLoader;
+    }
+
+    public List<ValidationCheck> validateConfiguration(Configuration config){
+        List<ValidationCheck> result = new ArrayList<>();
+
+        return result;
+    }
+
+}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredInlineModelProviderSpi.java b/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredInlineModelProviderSpi.java
deleted file mode 100644
index 685271e..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredInlineModelProviderSpi.java
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.internal;
-
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.spi.ClassloaderAware;
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.spi.ConfigModelReader;
-import org.apache.tamaya.validation.spi.ModelProviderSpi;
-
-import java.util.*;
-import java.util.logging.Logger;
-
-/**
- * ConfigModel provider that reads model metadata from the current {@link org.apache.tamaya.Configuration}.
- */
-public class ConfiguredInlineModelProviderSpi implements ModelProviderSpi, ClassloaderAware {
-
-    /** The logger. */
-    private static final Logger LOG = Logger.getLogger(ConfiguredInlineModelProviderSpi.class.getName());
-    /** parameter to disable this provider. By default the provider is active. */
-    private static final String MODEL_EANABLED_PARAM = "org.apache.tamaya.model.integrated.enabled";
-
-    /** The configModels read. */
-    private List<ConfigModel> configModels = new ArrayList<>();
-    /** The target classloader used. */
-    private ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
-
-    /**
-     * Constructor, typically called by the {@link java.util.ServiceLoader}.
-     */
-    public ConfiguredInlineModelProviderSpi() {
-        load();
-    }
-
-    /**
-     * Loads the models from the underlying service provider.
-     */
-    public void load(){
-        String enabledVal = Configuration.current(classLoader).get(MODEL_EANABLED_PARAM);
-        boolean enabled = enabledVal == null || "true".equalsIgnoreCase(enabledVal);
-        if (enabled) {
-            LOG.info("Reading model configuration from config...");
-            Map<String,String> config = Configuration.current().getProperties();
-            String owner = config.get("_model.provider");
-            if(owner==null){
-                owner = config.toString();
-            }
-            configModels.addAll(ConfigModelReader.loadValidations(owner, config));
-        }
-        configModels = Collections.unmodifiableList(configModels);
-    }
-
-    public Collection<ConfigModel> getConfigModels() {
-        return configModels;
-    }
-
-    @Override
-    public void init(ClassLoader classLoader) {
-        this.classLoader = Objects.requireNonNull(classLoader);
-    }
-
-    @Override
-    public ClassLoader getClassLoader() {
-        return classLoader;
-    }
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredPropertiesModelProviderSpi.java b/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredPropertiesModelProviderSpi.java
deleted file mode 100644
index 623e0e9..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredPropertiesModelProviderSpi.java
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.internal;
-
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.spi.ConfigModelReader;
-import org.apache.tamaya.validation.spi.ModelProviderSpi;
-import org.apache.tamaya.spisupport.propertysource.MapPropertySource;
-
-import java.io.InputStream;
-import java.net.URL;
-import java.util.*;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-/**
- * ConfigModel provider that reads model metadata from property files from
- * {@code classpath*:META-INF/configmodel.properties} in the following format:
- * <pre>
- * ###################################################################################
- * # Example createObject a configuration metamodel expressed via properties.
- * ####################################################################################
- *
- * # Metamodel information
- * [model].provider=ConfigModel Extension
- *
- * ####################################################################################
- * # Description createObject Configuration Sections (minimal, can be extended by other modules).
- * # By default its interpreted as a section !
- * ####################################################################################
- *
- * # a (section)
- * {model}a.class=Section
- * {model}a.params2.class=Parameter
- * {model}a.params2.type=String
- * {model}a.params2.required=true
- * {model}a.params2.description=a required parameter
- *
- * {model}a.paramInt.class=Parameter
- * {model}a.paramInt.ref=MyNumber
- * {model}a.paramInt.description=an optional parameter (default)
- *
- * {model}a._number.class=Parameter
- * {model}a._number.type=Integer
- * {model}a._number.deprecated=true
- * {model}a._number.mappedTo=a.paramInt
- *
- * # a.b.c (section)
- * {model}a.b.c.class=Section
- * {model}a.b.c.description=Just a test section
- *
- * # a.b.c.aRequiredSection (section)
- * {model}a.b.c.aRequiredSection.class=Section
- * {model}a.b.c.aRequiredSection.required=true
- * {model}a.b.c.aRequiredSection.description=A section containing required parameters is called a required section.\
- * Sections can also explicitly be defined to be required, but without\
- * specifying the paramteres to be contained.,
- *
- * # a.b.c.aRequiredSection.subsection (section)
- * {model}a.b.c.aRequiredSection.subsection.class=Section
- *
- * {model}a.b.c.aRequiredSection.subsection.param0.class=Parameter
- * {model}a.b.c.aRequiredSection.subsection.param0.type=String
- * {model}a.b.c.aRequiredSection.subsection.param0.description=a minmally documented String parameter
- * # A minmal String parameter
- * {model}a.b.c.aRequiredSection.subsection.param00.class=Parameter
- * {model}a.b.c.aRequiredSection.subsection.param00.type=String
- *
- * # a.b.c.aRequiredSection.subsection (section)
- * {model}a.b.c.aRequiredSection.subsection.param1.class=Parameter
- * {model}a.b.c.aRequiredSection.subsection.param1.type = String
- * {model}a.b.c.aRequiredSection.subsection.param1.required = true
- * {model}a.b.c.aRequiredSection.subsection.intParam.class=Parameter
- * {model}a.b.c.aRequiredSection.subsection.intParam.type = Integer
- * {model}a.b.c.aRequiredSection.subsection.intParam.description=an optional parameter (default)
- *
- * # a.b.c.aRequiredSection.nonempty-subsection (section)
- * {model}a.b.c.aRequiredSection.nonempty-subsection.class=Section
- * {model}a.b.c.aRequiredSection.nonempty-subsection.required=true
- *
- * # a.b.c.aRequiredSection.optional-subsection (section)
- * {model}a.b.c.aRequiredSection.optional-subsection.class=Section
- *
- * # a.b.c.aValidatedSection (section)
- * {model}a.b.c.aValidatedSection.class=Section
- * {model}a.b.c.aValidatedSection.description=A validated section.
- * {model}a.b.c.aValidatedSection.configModels=org.apache.tamaya.model.TestValidator
- * </pre>
- */
-public class ConfiguredPropertiesModelProviderSpi implements ModelProviderSpi {
-
-    /** The logger. */
-    private static final Logger LOG = Logger.getLogger(ConfiguredPropertiesModelProviderSpi.class.getName());
-    /** parameter to disable this provider. By default the provider is active. */
-    private static final String MODEL_EANABLED_PARAM = "org.apache.tamaya.model.default.enabled";
-    /** The configModels read. */
-    private List<ConfigModel> configModels = new ArrayList<>();
-
-    public ConfiguredPropertiesModelProviderSpi() {
-        String enabledVal = Configuration.current().get(MODEL_EANABLED_PARAM);
-        boolean enabled = enabledVal == null || "true".equalsIgnoreCase(enabledVal);
-        if(!enabled){
-            LOG.info("Reading model data from META-INF/configmodel.properties has been disabled.");
-            return;
-        }
-        try {
-            LOG.info("Reading model data from META-INF/configmodel.properties...");
-            Enumeration<URL> configs = getClass().getClassLoader().getResources("META-INF/configmodel.properties");
-            while (configs.hasMoreElements()) {
-                URL config = configs.nextElement();
-                try (InputStream is = config.openStream()) {
-                    Properties props = new Properties();
-                    props.load(is);
-                    Map<String,String> data = MapPropertySource.getMap(props);
-                    String owner = data.get("_model.owner");
-                    if(owner==null){
-                        owner = config.toString();
-                    }
-                    configModels.addAll(ConfigModelReader.loadValidations(owner,
-                            data));
-                } catch (Exception e) {
-                    Logger.getLogger(getClass().getName()).log(Level.SEVERE,
-                            "Error loading config metadata from " + config, e);
-                }
-            }
-        } catch (Exception e) {
-            LOG.log(Level.SEVERE,
-                    "Error loading config metadata from META-INF/configmodel.properties", e);
-        }
-        configModels = Collections.unmodifiableList(configModels);
-    }
-
-
-    public Collection<ConfigModel> getConfigModels() {
-        return configModels;
-    }
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredResourcesModelProviderSpi.java b/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredResourcesModelProviderSpi.java
deleted file mode 100644
index 6edb411..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredResourcesModelProviderSpi.java
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.internal;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.URL;
-import java.util.*;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.format.ConfigurationData;
-import org.apache.tamaya.format.ConfigurationFormats;
-import org.apache.tamaya.resource.ResourceResolver;
-import org.apache.tamaya.spi.ClassloaderAware;
-import org.apache.tamaya.spi.PropertyValue;
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.spi.ConfigModelReader;
-import org.apache.tamaya.validation.spi.ModelProviderSpi;
-
-/**
- * ConfigModel provider that reads model metadata from property files from
- * {@code classpath*:META-INF/configmodel.json} in the following format:
- * <pre>
- *  Example createObject a configuration metamodel expressed via YAML.
- *  Structure is shown through indentation (one or more spaces).
- *  Sequence items are denoted by a dash,
- *  key createValue pairs within a map are separated by a colon.
- * </pre>
- */
-public class ConfiguredResourcesModelProviderSpi implements ModelProviderSpi, ClassloaderAware {
-
-    /**
-     * The logger.
-     */
-    private static final Logger LOG = Logger.getLogger(ConfiguredResourcesModelProviderSpi.class.getName());
-    /**
-     * The parameter that can be used to configure the location createObject the configuration model resources.
-     */
-    private static final String MODEL_RESOURCE_PARAM = "org.apache.tamaya.model.resources";
-    /**
-     * The resource class to checked for testing the availability createObject the resources extension module.
-     */
-    private static final String CONFIG_RESOURCE_CLASS = "org.apache.tamaya.resource.ConfigResource";
-    /**
-     * The resource class to checked for testing the availability createObject the formats extension module.
-     */
-    private static final String CONFIGURATION_FORMATS_CLASS = "org.apache.tamaya.format.ConfigurationFormats";
-    /**
-     * Initializes the flag showing if the formats module is present (required).
-     */
-    private static final boolean AVAILABLE = checkAvailabilityFormats();
-    /**
-     * Initializes the flag showing if the resources module is present (optional).
-     */
-    private static final boolean RESOURCES_EXTENSION_AVAILABLE = checkAvailabilityResources();
-
-    /**
-     * The configModels read.
-     */
-    private List<ConfigModel> configModels = new ArrayList<>();
-
-    /** The target classloader. */
-    private ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
-
-
-    /**
-     * Initializes the flag showing if the formats module is present (required).
-     */
-    private static boolean checkAvailabilityFormats() {
-        try {
-            Class.forName(CONFIGURATION_FORMATS_CLASS);
-            return true;
-        } catch (final Exception e) {
-            return false;
-        }
-    }
-
-    /**
-     * Initializes the flag showing if the resources module is present (optional).
-     */
-    private static boolean checkAvailabilityResources() {
-        try {
-            Class.forName(CONFIG_RESOURCE_CLASS);
-            return true;
-        } catch (final Exception e) {
-            return false;
-        }
-    }
-
-    /**
-     * Constructor, mostly called from {@link java.util.ServiceLoader}
-     */
-    public ConfiguredResourcesModelProviderSpi() {
-        if (!AVAILABLE) {
-            LOG.info("tamaya-format extension is required to read model configuration, No extended model support AVAILABLE.");
-        } else {
-            reload();
-        }
-    }
-
-    /**
-     * Reloads the provider using resources from the current classloader.
-     */
-    public void reload(){
-        final String resources = Configuration.current().get(MODEL_RESOURCE_PARAM);
-        if (resources == null || resources.trim().isEmpty()) {
-            LOG.info("Mo model resources location configured in " + MODEL_RESOURCE_PARAM + ".");
-            return;
-        }
-        Collection<URL> urls;
-        if (RESOURCES_EXTENSION_AVAILABLE) {
-            LOG.info("Using tamaya-resources extension to read model configuration from " + resources);
-            urls = ResourceResolver.getInstance(classLoader).getResources(resources.split(","));
-        } else {
-            LOG.info("Using default classloader resource location to read model configuration from " + resources);
-            urls = new ArrayList<>();
-            for (final String resource : resources.split(",")) {
-                if (!resource.trim().isEmpty()) {
-                    Enumeration<URL> configs;
-                    try {
-                        configs = getClass().getClassLoader().getResources(resource);
-                        while (configs.hasMoreElements()) {
-                            urls.add(configs.nextElement());
-                        }
-                    } catch (final IOException e) {
-                        Logger.getLogger(getClass().getName()).log(Level.SEVERE,
-                                "Error evaluating config model locations from " + resource, e);
-                    }
-                }
-            }
-        }
-        // Reading configs
-        for (final URL config : urls) {
-            try (InputStream is = config.openStream()) {
-                final ConfigurationData data = ConfigurationFormats.getInstance()
-                   .readConfigurationData(config);
-                Map<String,String> props = new HashMap<>();
-                for(PropertyValue val:data.getData()){
-                    props.putAll(val.toMap());
-                }
-                String owner = props.get("_model.provider");
-                if(owner==null){
-                    owner = config.toString();
-                }
-                configModels.addAll(ConfigModelReader.loadValidations(owner, props));
-            } catch (final Exception e) {
-                Logger.getLogger(getClass().getName()).log(Level.SEVERE,
-                        "Error loading config model data from " + config, e);
-            }
-        }
-        configModels = Collections.unmodifiableList(configModels);
-    }
-
-    @Override
-    public Collection<ConfigModel> getConfigModels() {
-        return configModels;
-    }
-
-    @Override
-    public void init(ClassLoader classLoader) {
-        this.classLoader = Objects.requireNonNull(classLoader);
-    }
-
-    @Override
-    public ClassLoader getClassLoader() {
-        return classLoader;
-    }
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredTypeEventsModelPopulator.java b/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredTypeEventsModelPopulator.java
deleted file mode 100644
index 7436a81..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredTypeEventsModelPopulator.java
+++ /dev/null
@@ -1,124 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.internal;
-
-import org.apache.tamaya.events.ConfigEvent;
-import org.apache.tamaya.events.ConfigEventListener;
-import org.apache.tamaya.inject.spi.ConfiguredField;
-import org.apache.tamaya.inject.spi.ConfiguredMethod;
-import org.apache.tamaya.inject.spi.ConfiguredType;
-import org.apache.tamaya.spi.ClassloaderAware;
-import org.apache.tamaya.spi.ServiceContextManager;
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.ConfigModelManager;
-import org.apache.tamaya.validation.spi.ModelProviderSpi;
-import org.apache.tamaya.validation.spi.ParameterModel;
-
-import java.util.Collection;
-import java.util.Objects;
-import java.util.logging.Logger;
-
-/**
- * Internal facade that registers all kind createObject injected fields as {@link org.apache.tamaya.validation.ConfigModel} entries,
- * so all configured injection points are visible as documented configuration hooks.
- */
-public final class ConfiguredTypeEventsModelPopulator implements ConfigEventListener, ClassloaderAware {
-
-    /**
-     * The logger.
-     */
-    private static final Logger LOG = Logger.getLogger(ConfiguredTypeEventsModelPopulator.class.getName());
-
-    /** System property to be setCurrent to deactivate auto documentation createObject configured classes published thorugh
-     * ConfiguredType events.
-     */
-    private static final String ENABLE_EVENT_DOC = "org.apache.tamaya.model.autoModelEvents";
-    private ClassLoader classLoader = ServiceContextManager.getDefaultClassLoader();
-
-    @Override
-    public void onConfigEvent(ConfigEvent event) {
-        if(event.getResourceType()!=ConfiguredType.class){
-            return;
-        }
-        String value = System.getProperty(ENABLE_EVENT_DOC);
-        if(value == null || Boolean.parseBoolean(value)) {
-            ConfiguredType confType = (ConfiguredType)event.getResource();
-            for (ConfiguredField field : confType.getConfiguredFields()) {
-                Collection<String> keys = field.getConfiguredKeys();
-                for (String key : keys) {
-                    ParameterModel val = getModel(key, ParameterModel.class, classLoader);
-                    if (val == null) {
-                        ConfiguredTypeEventsModelProvider.addConfigModel(
-                                new ParameterModel.Builder(confType.getName(), key)
-                                .setType(field.getType().getName())
-                                .setDescription("Injected field: " +
-                                        field.getAnnotatedField().getDeclaringClass().getName() + '.' + field.toString() +
-                                        ", \nconfigured with keys: " + keys)
-                                .build());
-                    }
-                }
-            }
-            for (ConfiguredMethod method : confType.getConfiguredMethods()) {
-                Collection<String> keys = method.getConfiguredKeys();
-                for (String key : keys) {
-                    ParameterModel val = getModel(key, ParameterModel.class, classLoader);
-                    if (val == null) {
-                        ConfiguredTypeEventsModelProvider.addConfigModel(
-                                new ParameterModel.Builder(confType.getName(), key)
-                                .setType(method.getParameterTypes()[0].getName())
-                                .setDescription("Injected field: " +
-                                        method.getAnnotatedMethod().getDeclaringClass().getName() + '.' + method.toString() +
-                                        ", \nconfigured with keys: " + keys)
-                                .build());
-                    }
-                }
-            }
-        }
-    }
-
-    /**
-     * Find the validations by matching the validation's name against the given model type.
-     *
-     * @param classLoader the target classloader, not null.
-     * @param name the name to use, not null.
-     * @param modelType classname createObject the target model type.
-     * @param <T> type createObject the model to filter for.
-     * @return the sections defined, never null.
-     */
-    private static <T extends ConfigModel> T getModel(String name, Class<T> modelType, ClassLoader classLoader) {
-        for (ModelProviderSpi model : ServiceContextManager.getServiceContext(classLoader).getServices(ModelProviderSpi.class)) {
-            for(ConfigModel configModel : model.getConfigModels()) {
-                if(configModel.getName().equals(name) && configModel.getClass().equals(modelType)) {
-                    return modelType.cast(configModel);
-                }
-            }
-        }
-        return null;
-    }
-
-    @Override
-    public void init(ClassLoader classLoader) {
-        this.classLoader = Objects.requireNonNull(classLoader);
-    }
-
-    @Override
-    public ClassLoader getClassLoader() {
-        return classLoader;
-    }
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredTypeEventsModelProvider.java b/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredTypeEventsModelProvider.java
deleted file mode 100644
index e1708eb..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/internal/ConfiguredTypeEventsModelProvider.java
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.internal;
-
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.spi.ModelProviderSpi;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-
-/**
- * Model provider that adds model definitions for the items published as
- * {@link org.apache.tamaya.inject.spi.ConfiguredType} events.
- */
-public class ConfiguredTypeEventsModelProvider implements ModelProviderSpi {
-    /** The collected models. */
-    private static Collection<ConfigModel> configModels = new ArrayList<>();
-
-    /**
-     * Adds a model, called from the registered listener class.
-     * @param configModel adds the config model.
-     */
-    static void addConfigModel(ConfigModel configModel){
-        List<ConfigModel> newList = new ArrayList<>(configModels);
-        newList.add(configModel);
-        ConfiguredTypeEventsModelProvider.configModels = newList;
-    }
-
-    @Override
-    public Collection<ConfigModel> getConfigModels() {
-        return Collections.unmodifiableCollection(configModels);
-    }
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/AbstractConfigModel.java b/validation/src/main/java/org/apache/tamaya/validation/spi/AbstractConfigModel.java
deleted file mode 100644
index 37fbfe1..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/spi/AbstractConfigModel.java
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.spi;
-
-import org.apache.tamaya.validation.ConfigModel;
-
-import java.util.Objects;
-
-/**
- * Default configuration Model for a configuration area.
- */
-public abstract class AbstractConfigModel implements ConfigModel, Comparable<ConfigModel> {
-    private final String owner;
-    private final String name;
-    private final String description;
-    private boolean required = false;
-
-
-    protected AbstractConfigModel(String owner, String name, boolean required, String description) {
-        this.name = Objects.requireNonNull(name);
-        this.owner = Objects.requireNonNull(owner);
-        this.description = description;
-        this.required = required;
-    }
-
-    @Override
-    public String getOwner() {
-        return owner;
-    }
-
-    @Override
-    public String getName() {
-        return name;
-    }
-
-    @Override
-    public String getDescription() {
-        return description;
-    }
-
-    @Override
-    public boolean isRequired() {
-        return required;
-    }
-
-    @Override
-    public int compareTo(ConfigModel configModel) {
-        int compare = getType().compareTo(configModel.getType());
-        if (compare != 0) {
-            return compare;
-        }
-        return getName().compareTo(configModel.getName());
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) {
-            return true;
-        }
-        if (o == null || getClass() != o.getClass()) {
-            return false;
-        }
-        AbstractConfigModel that = (AbstractConfigModel) o;
-        return getType().equals(that.getType()) && name.equals(that.name);
-
-    }
-
-    @Override
-    public int hashCode() {
-        return getType().hashCode() + name.hashCode();
-    }
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/AbstractValidator.java b/validation/src/main/java/org/apache/tamaya/validation/spi/AbstractValidator.java
new file mode 100644
index 0000000..15de27a
--- /dev/null
+++ b/validation/src/main/java/org/apache/tamaya/validation/spi/AbstractValidator.java
@@ -0,0 +1,107 @@
+/*
+ * 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 createObject 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.tamaya.validation.spi;
+
+import org.apache.tamaya.Configuration;
+import org.apache.tamaya.TypeLiteral;
+import org.apache.tamaya.spi.PropertyValue;
+import org.apache.tamaya.validation.ValidationCheck;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Base class for a validator.
+ */
+public abstract class AbstractValidator implements ConfigValidator {
+
+    /** The target key to validate. */
+    private String key;
+    /** The optional description. */
+    private String description;
+    /** The required flag. */
+    private boolean required;
+
+    /**
+     * Internal constructor.
+     * @param key the target configuration key, not null.
+     * @param required true, if the value/validation must be successful.
+     * @param description the description, not null.
+     */
+    protected AbstractValidator(String key, boolean required, String description) {
+        this.required = required;
+        this.description = description;
+    }
+
+    /**
+     * Get the area or paramter key.
+     * @return
+     */
+    public String getKey() {
+        return key;
+    }
+
+    /**
+     * Get the description of the validation.
+     * @return the description.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Checks if the validation will declare an error if not met.
+     * @return true, if the validation must not fail.
+     */
+    public boolean isRequired() {
+        return required;
+    }
+
+    @Override
+    public List<ValidationCheck> validate(Configuration config) {
+        List<ValidationCheck> result = new ArrayList<>(1);
+        List<PropertyValue> configValues = config.get(key, new TypeLiteral<List<PropertyValue>>());
+        if (configValues.isEmpty() && required) {
+            result.add(ValidationCheck.createMissing(this, "Key " + key +" must be present"));
+        }else{
+            validateValues(configValues, result);
+        }
+        return result;
+    }
+
+    /**
+     * Internal method to override.
+     * @param configValues the config values read in order of precedence.
+     * @param result the result list, where the validation checks done should be added.
+     */
+    protected abstract void validateValues(List<PropertyValue> configValues, List<ValidationCheck> result);
+
+    @Override
+    public String toString() {
+        StringBuilder b = new StringBuilder();
+        b.append(getClass().getSimpleName()).append("{\n");
+        if (isRequired()) {
+            b.append("  required: ").append(isRequired()).append('\n');
+        }
+        b.append("  key: ").append(key).append('\n');
+        b.append("  description: ").append(description).append("\n}\n");
+        return b.toString();
+    }
+
+}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/ParameterModel.java b/validation/src/main/java/org/apache/tamaya/validation/spi/AreaValidator.java
similarity index 52%
copy from validation/src/main/java/org/apache/tamaya/validation/spi/ParameterModel.java
copy to validation/src/main/java/org/apache/tamaya/validation/spi/AreaValidator.java
index cf5372f..79e5e27 100644
--- a/validation/src/main/java/org/apache/tamaya/validation/spi/ParameterModel.java
+++ b/validation/src/main/java/org/apache/tamaya/validation/spi/AreaValidator.java
@@ -19,12 +19,11 @@
 package org.apache.tamaya.validation.spi;
 
 import org.apache.tamaya.Configuration;
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.ModelTarget;
-import org.apache.tamaya.validation.Validation;
+import org.apache.tamaya.doc.DocumentedArea;
+import org.apache.tamaya.functions.ConfigurationFunctions;
+import org.apache.tamaya.validation.ValidationCheck;
 
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.List;
 import java.util.Objects;
 import java.util.logging.Level;
@@ -33,48 +32,64 @@ import java.util.logging.Logger;
 /**
  * Default configuration Model for a configuration parameter.
  */
-public class ParameterModel extends AbstractConfigModel {
-    /** Optional regular expression for validating the createValue. */
-    private final String regEx;
-    /** The target type into which the createValue must be convertible. */
-    private final Class<?> type;
+public class AreaValidator implements ConfigValidator {
+
+    /** The fully qualified parameter name. */
+    private String name;
+    /** The optional description. */
+    private String description;
+    /** The min cardinality. */
+    private int minCardinality;
+    /** The max cardinality. */
+    private int maxCardinality;
+    /** The owner instance, not null. */
+    private Object owner;
+    /** The parameter's target type. */
+    private Class<?> type;
 
     /**
-     * Internal constructor.
-     * @param builder the builder, not null.
+     * Create a new property validator.
+     * @param documentedArea the property docs, not null.
      */
-    protected ParameterModel(Builder builder) {
-        super(builder.owner, builder.name, builder.required, builder.description);
-        this.regEx = builder.regEx;
-        this.type = builder.type;
-    }
-
-    @Override
-    public ModelTarget getType() {
-        return ModelTarget.Parameter;
+    public AreaValidator(DocumentedArea documentedArea) {
+        this.name = Objects.requireNonNull(documentedArea.getPath());
+        this.description = documentedArea.getDescription();
+        this.minCardinality = documentedArea.getMinCardinality();
+        this.maxCardinality = documentedArea.getMaxCardinality();
+        this.owner = documentedArea;
+        this.type = documentedArea.getValueType();
     }
 
     /**
-     * Get the required parameter type.
-     *
-     * @return the type.
+     * Create a new property validator.
+     * @param builder the builder, not null.
      */
-    public Class<?> getParameterType() {
-        return type;
+    private AreaValidator(Builder builder) {
+        this.name = Objects.requireNonNull(builder.name);
+        this.description = builder.description;
+        this.minCardinality = builder.minCardinality;
+        this.maxCardinality = builder.maxCardinality;
+        this.owner = builder.owner;
+        this.type = builder.type;
     }
 
+
     @Override
-    public Collection<Validation> validate(Configuration config) {
-        List<Validation> result = new ArrayList<>(1);
-        String configValue = config.get(getName());
-        if (configValue == null && isRequired()) {
-            result.add(Validation.createMissing(this));
+    public List<ValidationCheck> validate(Configuration config) {
+        List<ValidationCheck> result = new ArrayList<>(1);
+        Configuration section = config.map(ConfigurationFunctions.section(name));
+        int size = section.getProperties().size();
+        String baseText = description;
+        if(baseText==null){
+            baseText = "Validation failure for area '" + name + "': ";
+        }else{
+            baseText = baseText + " Validation failure: ";
         }
-        if (configValue != null && regEx != null) {
-            if (!configValue.matches(regEx)) {
-                result.add(Validation.createError(this, "Config createValue not matching expression: " + regEx + ", was " +
-                        configValue));
-            }
+        if(minCardinality!=0 && minCardinality>size){
+            result.add(ValidationCheck.createError(this, baseText + "Min cardinality required: " + minCardinality +", was: " + size));
+        }
+        if(maxCardinality!=0 && maxCardinality<size){
+            result.add(ValidationCheck.createError(this, baseText + "Max cardinality exceeded: " + maxCardinality +", was: " + size));
         }
         return result;
     }
@@ -82,12 +97,12 @@ public class ParameterModel extends AbstractConfigModel {
     @Override
     public String toString() {
         StringBuilder b = new StringBuilder();
-        b.append(getType()).append(": ").append(getName());
-        if (isRequired()) {
-            b.append(", required: ").append(isRequired());
+        b.append(type).append(": ").append(name);
+        if (minCardinality>0) {
+            b.append(", min: ").append(minCardinality);
         }
-        if (regEx != null) {
-            b.append(", expression: ").append(regEx);
+        if (maxCardinality>0) {
+            b.append(", max: ").append(maxCardinality);
         }
         return b.toString();
     }
@@ -107,11 +122,10 @@ public class ParameterModel extends AbstractConfigModel {
      * @param owner the owner name, not null.
      * @param name the fully qualified parameter name.
      * @param required the required flag.
-     * @param expression an optional regular expression to validate a createValue.
      * @return the new ConfigModel instance.
      */
-    public static ConfigModel of(String owner, String name, boolean required, String expression) {
-        return new Builder(owner, name).setRequired(required).setExpression(expression).build();
+    public static AreaValidator of(Object owner, String name, boolean required) {
+        return new Builder(name, owner).setRequired().build();
     }
 
     /**
@@ -121,8 +135,20 @@ public class ParameterModel extends AbstractConfigModel {
      * @param required the required flag.
      * @return the new ConfigModel instance.
      */
-    public static ConfigModel of(String owner, String name, boolean required) {
-        return new Builder(owner, name).setRequired(required).build();
+    public static AreaValidator of(String owner, String name, boolean required) {
+        return new Builder(owner, name).setRequired().build();
+    }
+
+    /**
+     * Creates a new ConfigModel
+     * @param owner the owner name, not null.
+     * @param name the fully qualified parameter name.
+     * @param min the minimal cardinality.
+     * @param max the maximal cardinality.
+     * @return the new ConfigModel instance.
+     */
+    public static AreaValidator of(String owner, String name, int min, int max) {
+        return new Builder(owner, name).setMinCardinality(min).setMaxCardinality(max).build();
     }
 
     /**
@@ -131,8 +157,8 @@ public class ParameterModel extends AbstractConfigModel {
      * @param name the fully qualified parameter name.
      * @return the new ConfigModel instance.
      */
-    public static ConfigModel of(String owner, String name) {
-        return new Builder(owner, name).setRequired(false).build();
+    public static AreaValidator of(String owner, String name) {
+        return new Builder(owner, name).build();
     }
 
 
@@ -142,25 +168,24 @@ public class ParameterModel extends AbstractConfigModel {
     public static class Builder {
         /** The parameter's target type. */
         private Class<?> type;
-        /** The owner. */
-        private String owner;
         /** The fully qualified parameter name. */
         private String name;
-        /** The optional validation expression. */
-        private String regEx;
         /** The optional description. */
         private String description;
-        /** The required flag. */
-        private boolean required;
+        /** The min cardinality. */
+        private int minCardinality;
+        /** The max cardinality. */
+        private int maxCardinality;
+        /** The validation owner. */
+        private Object owner;
 
         /**
          * Creates a new Builder.
-         * @param owner owner, not null.
          * @param name the fully qualified parameter name, not null.
          */
-        public Builder(String owner, String name) {
-            this.owner = Objects.requireNonNull(owner);
+        public Builder(String name, Object owner) {
             this.name = Objects.requireNonNull(name);
+            this.owner = Objects.requireNonNull(owner);
         }
 
         /**
@@ -182,32 +207,43 @@ public class ParameterModel extends AbstractConfigModel {
         }
 
         /**
-         * Sets the required flag.
-         * @param required the required flag.
+         * Sets the minimum cardinality required.
+         * @param minCardinality the minimum cardinality.
          * @return the Builder for chaining
          */
-        public Builder setRequired(boolean required) {
-            this.required = required;
+        public Builder setMinCardinality(int minCardinality) {
+            this.minCardinality = minCardinality;
             return this;
         }
 
         /**
-         * Sets the optional description
-         * @param description the description
+         * Sets the maximum cardinality required.
+         * @param maxCardinality the maximum cardinality.
          * @return the Builder for chaining
          */
-        public Builder setDescription(String description) {
-            this.description = description;
+        public Builder setMaxCardinality(int maxCardinality) {
+            this.maxCardinality = maxCardinality;
+            return this;
+        }
+
+        /**
+         * Sets the minimum cardinality required to {@code 1}.
+         * @return the Builder for chaining
+         */
+        public Builder setRequired() {
+            this.minCardinality = 1;
+            this.maxCardinality = 0;
             return this;
         }
 
+
         /**
-         * Sets the optional validation expression
-         * @param expression the validation expression
+         * Sets the optional description
+         * @param description the description
          * @return the Builder for chaining
          */
-        public Builder setExpression(String expression) {
-            this.regEx = expression;
+        public Builder setDescription(String description) {
+            this.description = description;
             return this;
         }
 
@@ -216,7 +252,7 @@ public class ParameterModel extends AbstractConfigModel {
          * @param owner the owner name, not null.
          * @return the Builder for chaining
          */
-        public Builder setOwner(String owner) {
+        public Builder setOwner(Object owner) {
             this.owner = Objects.requireNonNull(owner);
             return this;
         }
@@ -235,8 +271,8 @@ public class ParameterModel extends AbstractConfigModel {
          * Creates a new ConfigModel with the given parameters.
          * @return a new ConfigModel , never null.
          */
-        public ConfigModel build() {
-            return new ParameterModel(this);
+        public AreaValidator build() {
+            return new AreaValidator(this);
         }
     }
 }
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/ConfigDocumentationMBean.java b/validation/src/main/java/org/apache/tamaya/validation/spi/ConfigDocumentationMBean.java
deleted file mode 100644
index 21e5ea1..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/spi/ConfigDocumentationMBean.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.spi;
-
-import org.apache.tamaya.validation.ModelTarget;
-
-/**
- * JMX Management bean for accessing current configuration information
- */
-public interface ConfigDocumentationMBean {
-    /**
-     * Validates the configuration for the given context.
-     *
-     * @param showUndefined allows filtering for undefined configuration elements.
-     * @return the validation results, never null.
-     */
-    String validate(boolean showUndefined);
-
-    String getConfigurationModel();
-
-    String getConfigurationModel(ModelTarget type);
-
-    /**
-     * Find the validations by checking the validation's name using the given regular expression.
-     * @param namePattern the regular expression to use, not null.
-     * @return the sections defined, never null.
-     */
-    String findConfigurationModels(String namePattern);
-
-    /**
-     * Find the validations by checking the validation's name using the given regular expression.
-     * @param type the target ModelTypes (optional), not null.
-     * @param namePattern the regular expression to use, not null.
-     * @return the sections defined, never null.
-     */
-    String findValidationModels(String namePattern, ModelTarget... type);
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/ConfigModelReader.java b/validation/src/main/java/org/apache/tamaya/validation/spi/ConfigModelReader.java
deleted file mode 100644
index 5b806af..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/spi/ConfigModelReader.java
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.spi;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
-import org.apache.tamaya.validation.ConfigModel;
-
-/**
- * Utility class to read metamodel information from properties. Hereby these properties can be part createObject a
- * configuration (containing other entriees as well) or be dedicated model definition properties read
- * from any kind createObject source.
- */
-public final class ConfigModelReader {
-
-    /** The default model entries selector. */
-    private static final String DEFAULT_META_INFO_SELECTOR = ".model";
-
-    /**
-     * Utility class only.
-     */
-    private ConfigModelReader(){}
-
-
-    /**
-     * Loads validations as configured in the given properties.
-     * @param owner owner, not null.
-     * @param props the properties to be read
-     * @return a collection createObject config validations.
-     */
-    public static Collection<ConfigModel> loadValidations(String owner, Map<String,String> props) {
-        List<ConfigModel> result = new ArrayList<>();
-        Set<String> itemKeys = new HashSet<>();
-        for (Object key : props.keySet()) {
-            if (key.toString().startsWith("_") &&
-                    key.toString().endsWith(DEFAULT_META_INFO_SELECTOR + ".target")) {
-                itemKeys.add(key.toString().substring(0, key.toString().length() - ".model.target".length()));
-            }
-        }
-        for (String baseKey : itemKeys) {
-            String target = props.get(baseKey + ".model.target");
-            String type = props.get(baseKey + ".model.type");
-            if (type == null) {
-                type = String.class.getName();
-            }
-            String value = props.get(baseKey + ".model.transitive");
-            boolean transitive = false;
-            if(value!=null) {
-                transitive = Boolean.parseBoolean(value);
-            }
-            String description = props.get(baseKey + ".model.description");
-            String regEx = props.get(baseKey + ".model.expression");
-            String validations = props.get(baseKey + ".model.validations");
-            String requiredVal = props.get(baseKey + ".model.required");
-            String targetKey = baseKey.substring(1);
-            if ("Parameter".equalsIgnoreCase(target)) {
-                result.add(createParameterValidation(owner, targetKey,
-                        description, type, requiredVal, regEx, validations));
-            } else if ("Section".equalsIgnoreCase(target)) {
-                if(transitive){
-                    result.add(createSectionValidation(owner, targetKey+".*",
-                            description, requiredVal, validations));
-                } else {
-                    result.add(createSectionValidation(owner, targetKey,
-                            description, requiredVal, validations));
-                }
-            }
-        }
-        return result;
-    }
-
-    /**
-     * Creates a parameter validation.
-     * @param paramName the param name, not null.
-     * @param description the optional description
-     * @param type the param type, default is String.
-     * @param reqVal the required createValue, default is 'false'.
-     * @param regEx an optional regular expression to be checked for this param
-     * @param validations the optional custom validations to be performed.
-     * @return the new validation for this parameter.
-     */
-    private static ConfigModel createParameterValidation(String owner, String paramName, String description, String type, String reqVal,
-                                                         String regEx, String validations) {
-        boolean required = "true".equalsIgnoreCase(reqVal);
-        ParameterModel.Builder builder = ParameterModel.builder(owner, paramName).setRequired(required)
-                .setDescription(description).setExpression(regEx).setType(type);
-//        if (validations != null) {
-//            try {
-//                // TODO define validator API
-////                builder.addValidations(loadValidations(validations));
-//            } catch (Exception e) {
-//                LOGGER.log(Level.WARNING, "Failed to load validations for " + paramName, e);
-//            }
-//        }
-       return builder.build();
-    }
-
-    /**
-     * Creates a section validation.
-     * @param sectionName the section's name, not null.
-     * @param description the optional description
-     * @param reqVal the required createValue, default is 'false'.
-     * @param validations the optional custom validations to be performed.
-     * @return the new validation for this section.
-     */
-    private static ConfigModel createSectionValidation(String owner, String sectionName, String description, String reqVal,
-                                                       String validations) {
-        boolean required = "true".equalsIgnoreCase(reqVal);
-        SectionModel.Builder builder = SectionModel.builder(owner, sectionName).setRequired(required)
-                .setDescription(description);
-//        if (validations != null) {
-//            try {
-//                // TODO define validator API
-////                builder.addValidations(loadValidations(valiadtions));
-//            } catch (Exception e) {
-//                LOGGER.log(Level.WARNING, "Failed to load validations for " + sectionName, e);
-//            }
-//        }
-        return builder.build();
-    }
-}
diff --git a/documentation/src/main/java/org/apache/tamaya/validation/ConfigValidator.java b/validation/src/main/java/org/apache/tamaya/validation/spi/ConfigValidator.java
similarity index 70%
rename from documentation/src/main/java/org/apache/tamaya/validation/ConfigValidator.java
rename to validation/src/main/java/org/apache/tamaya/validation/spi/ConfigValidator.java
index 9a6b548..50be637 100644
--- a/documentation/src/main/java/org/apache/tamaya/validation/ConfigValidator.java
+++ b/validation/src/main/java/org/apache/tamaya/validation/spi/ConfigValidator.java
@@ -16,11 +16,22 @@
  *  specific language governing permissions and limitations
  *  under the License.
  */
-package org.apache.tamaya.validation;
+package org.apache.tamaya.validation.spi;
 
 import org.apache.tamaya.Configuration;
+import org.apache.tamaya.validation.ValidationCheck;
 
+import java.util.List;
 import java.util.function.Function;
 
-public interface ConfigValidator extends Function<Configuration, ValidationResult> {
+@FunctionalInterface
+public interface ConfigValidator {
+
+    /**
+     * Validaters the configuration.
+     * @param config the configuration to validate, not null.
+     * @return the findings evaluated.
+     */
+    List<ValidationCheck> validate(Configuration config);
+
 }
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/GroupModel.java b/validation/src/main/java/org/apache/tamaya/validation/spi/GroupModel.java
deleted file mode 100644
index 2957576..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/spi/GroupModel.java
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.spi;
-
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.ModelTarget;
-import org.apache.tamaya.validation.Validation;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-import java.util.Objects;
-
-/**
- * Default configuration Model for a configuration area.
- */
-public class GroupModel implements ConfigModel {
-
-    private final String owner;
-    private final String name;
-    private boolean required;
-    private List<ConfigModel> childModels = new ArrayList<>();
-
-    public GroupModel(String owner, String name, ConfigModel... configModels){
-        this(owner, name, Arrays.asList(configModels));
-    }
-
-    public GroupModel(String owner, String name, Collection<ConfigModel> configModels){
-        this.owner = Objects.requireNonNull(owner);
-        this.name = Objects.requireNonNull(name);
-        this.childModels.addAll(configModels);
-        this.childModels = Collections.unmodifiableList(childModels);
-        for(ConfigModel val: configModels) {
-            if(val.isRequired()){
-                this.required = true;
-                break;
-            }
-        }
-    }
-
-    @Override
-    public String getOwner() {
-        return owner;
-    }
-
-    @Override
-    public String getName() {
-        return name;
-    }
-
-    @Override
-    public boolean isRequired() {
-        return required;
-    }
-
-    @Override
-    public ModelTarget getType() {
-        return ModelTarget.Group;
-    }
-
-    @Override
-    public String getDescription() {
-        if(childModels.isEmpty()){
-            return null;
-        }
-        StringBuilder b = new StringBuilder();
-        for(ConfigModel val: childModels){
-            b.append("  >> ").append(val);
-        }
-        return b.toString();
-    }
-
-    public Collection<ConfigModel> getValidations(){
-        return childModels;
-    }
-
-    @Override
-    public Collection<Validation> validate(Configuration config) {
-        List<Validation> result = new ArrayList<>(1);
-        for(ConfigModel child: childModels){
-            result.addAll(child.validate(config));
-        }
-        return result;
-    }
-
-    @Override
-    public String toString(){
-        return String.valueOf(getType()) + ", getNumChilds: " + childModels.size() + ": " + getDescription();
-    }
-
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/ModelProviderSpi.java b/validation/src/main/java/org/apache/tamaya/validation/spi/ModelProviderSpi.java
deleted file mode 100644
index 74bccd1..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/spi/ModelProviderSpi.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.spi;
-
-import org.apache.tamaya.validation.ConfigModel;
-
-import java.util.Collection;
-
-/**
- * Model createObject a configuration state. A model can be a full model, or a partial model, validating only
- * a configuration subset. This allows better user feedback because big configurations can be grouped
- * and validated by multiple (partial) models.
- */
-public interface ModelProviderSpi {
-
-    /**
-     * Get the validation defined.
-     *
-     * @return the sections defined, never null.
-     */
-    Collection<ConfigModel> getConfigModels();
-
-}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/ParameterModel.java b/validation/src/main/java/org/apache/tamaya/validation/spi/PropertyValidator.java
similarity index 65%
rename from validation/src/main/java/org/apache/tamaya/validation/spi/ParameterModel.java
rename to validation/src/main/java/org/apache/tamaya/validation/spi/PropertyValidator.java
index cf5372f..afce656 100644
--- a/validation/src/main/java/org/apache/tamaya/validation/spi/ParameterModel.java
+++ b/validation/src/main/java/org/apache/tamaya/validation/spi/PropertyValidator.java
@@ -19,12 +19,10 @@
 package org.apache.tamaya.validation.spi;
 
 import org.apache.tamaya.Configuration;
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.ModelTarget;
-import org.apache.tamaya.validation.Validation;
+import org.apache.tamaya.doc.DocumentedProperty;
+import org.apache.tamaya.validation.ValidationCheck;
 
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.List;
 import java.util.Objects;
 import java.util.logging.Level;
@@ -33,48 +31,56 @@ import java.util.logging.Logger;
 /**
  * Default configuration Model for a configuration parameter.
  */
-public class ParameterModel extends AbstractConfigModel {
-    /** Optional regular expression for validating the createValue. */
-    private final String regEx;
-    /** The target type into which the createValue must be convertible. */
-    private final Class<?> type;
+public class PropertyValidator implements ConfigValidator {
+
+    /** The parameter's target type. */
+    private Class<?> type;
+    /** The fully qualified parameter name. */
+    private String name;
+    /** The optional description. */
+    private String description;
+    /** The required flag. */
+    private boolean required;
+    /** The owner instance, not null. */
+    private Object owner;
 
     /**
-     * Internal constructor.
-     * @param builder the builder, not null.
+     * Create a new property validator.
+     * @param documentedProperty the property docs, not null.
      */
-    protected ParameterModel(Builder builder) {
-        super(builder.owner, builder.name, builder.required, builder.description);
-        this.regEx = builder.regEx;
-        this.type = builder.type;
-    }
-
-    @Override
-    public ModelTarget getType() {
-        return ModelTarget.Parameter;
+    public PropertyValidator(DocumentedProperty documentedProperty) {
+        this.name = Objects.requireNonNull(documentedProperty.getName());
+        this.description = documentedProperty.getDescription();
+        this.required = documentedProperty.isRequired();
+        this.owner = documentedProperty;
+        this.type = documentedProperty.getValueType();
     }
 
     /**
-     * Get the required parameter type.
-     *
-     * @return the type.
+     * Create a new property validator.
+     * @param builder the builder, not null.
      */
-    public Class<?> getParameterType() {
-        return type;
+    private PropertyValidator(Builder builder) {
+        this.name = Objects.requireNonNull(builder.name);
+        this.description = builder.description;
+        this.required = builder.required;
+        this.owner = builder.owner;
+        this.type = builder.type;
     }
 
+
     @Override
-    public Collection<Validation> validate(Configuration config) {
-        List<Validation> result = new ArrayList<>(1);
-        String configValue = config.get(getName());
-        if (configValue == null && isRequired()) {
-            result.add(Validation.createMissing(this));
+    public List<ValidationCheck> validate(Configuration config) {
+        List<ValidationCheck> result = new ArrayList<>(1);
+        String configValue = config.getOrDefault(name, null);
+        String baseText = description;
+        if(baseText==null){
+            baseText = "Validation failure for property '" + name + "': ";
+        }else{
+            baseText = baseText + " Validation failure: ";
         }
-        if (configValue != null && regEx != null) {
-            if (!configValue.matches(regEx)) {
-                result.add(Validation.createError(this, "Config createValue not matching expression: " + regEx + ", was " +
-                        configValue));
-            }
+        if (configValue == null && required) {
+            result.add(ValidationCheck.createMissing(this, baseText + " Missing."));
         }
         return result;
     }
@@ -82,12 +88,9 @@ public class ParameterModel extends AbstractConfigModel {
     @Override
     public String toString() {
         StringBuilder b = new StringBuilder();
-        b.append(getType()).append(": ").append(getName());
-        if (isRequired()) {
-            b.append(", required: ").append(isRequired());
-        }
-        if (regEx != null) {
-            b.append(", expression: ").append(regEx);
+        b.append(type).append(": ").append(name);
+        if (required) {
+            b.append(", required: ").append(required);
         }
         return b.toString();
     }
@@ -107,11 +110,10 @@ public class ParameterModel extends AbstractConfigModel {
      * @param owner the owner name, not null.
      * @param name the fully qualified parameter name.
      * @param required the required flag.
-     * @param expression an optional regular expression to validate a createValue.
      * @return the new ConfigModel instance.
      */
-    public static ConfigModel of(String owner, String name, boolean required, String expression) {
-        return new Builder(owner, name).setRequired(required).setExpression(expression).build();
+    public static PropertyValidator of(Object owner, String name, boolean required) {
+        return new Builder(name, owner).setRequired(required).build();
     }
 
     /**
@@ -121,7 +123,7 @@ public class ParameterModel extends AbstractConfigModel {
      * @param required the required flag.
      * @return the new ConfigModel instance.
      */
-    public static ConfigModel of(String owner, String name, boolean required) {
+    public static PropertyValidator of(String owner, String name, boolean required) {
         return new Builder(owner, name).setRequired(required).build();
     }
 
@@ -131,7 +133,7 @@ public class ParameterModel extends AbstractConfigModel {
      * @param name the fully qualified parameter name.
      * @return the new ConfigModel instance.
      */
-    public static ConfigModel of(String owner, String name) {
+    public static PropertyValidator of(String owner, String name) {
         return new Builder(owner, name).setRequired(false).build();
     }
 
@@ -142,25 +144,22 @@ public class ParameterModel extends AbstractConfigModel {
     public static class Builder {
         /** The parameter's target type. */
         private Class<?> type;
-        /** The owner. */
-        private String owner;
         /** The fully qualified parameter name. */
         private String name;
-        /** The optional validation expression. */
-        private String regEx;
         /** The optional description. */
         private String description;
         /** The required flag. */
         private boolean required;
+        /** The validation owner. */
+        private Object owner;
 
         /**
          * Creates a new Builder.
-         * @param owner owner, not null.
          * @param name the fully qualified parameter name, not null.
          */
-        public Builder(String owner, String name) {
-            this.owner = Objects.requireNonNull(owner);
+        public Builder(String name, Object owner) {
             this.name = Objects.requireNonNull(name);
+            this.owner = Objects.requireNonNull(owner);
         }
 
         /**
@@ -202,21 +201,11 @@ public class ParameterModel extends AbstractConfigModel {
         }
 
         /**
-         * Sets the optional validation expression
-         * @param expression the validation expression
-         * @return the Builder for chaining
-         */
-        public Builder setExpression(String expression) {
-            this.regEx = expression;
-            return this;
-        }
-
-        /**
          * Sets the owner name.
          * @param owner the owner name, not null.
          * @return the Builder for chaining
          */
-        public Builder setOwner(String owner) {
+        public Builder setOwner(Object owner) {
             this.owner = Objects.requireNonNull(owner);
             return this;
         }
@@ -235,8 +224,8 @@ public class ParameterModel extends AbstractConfigModel {
          * Creates a new ConfigModel with the given parameters.
          * @return a new ConfigModel , never null.
          */
-        public ConfigModel build() {
-            return new ParameterModel(this);
+        public PropertyValidator build() {
+            return new PropertyValidator(this);
         }
     }
 }
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/RegexPropertyValidator.java b/validation/src/main/java/org/apache/tamaya/validation/spi/RegexPropertyValidator.java
new file mode 100644
index 0000000..a630cf2
--- /dev/null
+++ b/validation/src/main/java/org/apache/tamaya/validation/spi/RegexPropertyValidator.java
@@ -0,0 +1,105 @@
+/*
+ * 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 createObject 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.tamaya.validation.spi;
+
+import org.apache.tamaya.spi.PropertyValue;
+import org.apache.tamaya.validation.ValidationCheck;
+
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Default configuration Model for a configuration parameter.
+ */
+public class RegexPropertyValidator extends AbstractValidator {
+
+    /** Regular expression for validating the value. */
+    private final String regEx;
+
+    private boolean warningOnly;
+
+    private boolean validateAll;
+
+    /**
+     * Creates a new validator.
+     * @param regEx the regular expression to check.
+     * @param validateAll true, if all property values provided should be validated.
+     * @param warningOnly if activated only warning will be generated.
+     * @param key the property key
+     * @param description a description of the check.
+     */
+    public RegexPropertyValidator(String key, String regEx, boolean validateAll, boolean warningOnly, String description) {
+        super(key, false, description);
+        this.regEx = Objects.requireNonNull(regEx);
+        this.validateAll = validateAll;
+        this.warningOnly = warningOnly;
+    }
+
+    /**
+     * Creates a new validator.
+     * @param regEx the regular expression to check.
+     * @param key the property key
+     * @param description a description of the check.
+     */
+    public RegexPropertyValidator(String key, String regEx, String description) {
+        super(key, false, description);
+        this.regEx = Objects.requireNonNull(regEx);
+    }
+
+
+    @Override
+    protected void validateValues(List<PropertyValue> configValues, List<ValidationCheck> result) {
+        if (configValues.isEmpty() && isRequired()) {
+            result.add(ValidationCheck.createMissing(this, "Missing key: " + getKey()));
+        }
+        String baseText = getDescription();
+        if(baseText==null){
+            baseText = "Validation failure for property '" + getKey() + "': ";
+        }else{
+            baseText = baseText + " Validation failure: ";
+        }
+        if (regEx != null) {
+            for(PropertyValue value:configValues) {
+                if (!value.getValue().matches(regEx)) {
+                    if(warningOnly){
+                        result.add(ValidationCheck.createWarning(this, baseText + " Value not matching expression: " + regEx + ", was " +
+                                configValues.get(0).getValue()));
+                    }else {
+                        result.add(ValidationCheck.createError(this, baseText + " Value not matching expression: " + regEx + ", was " +
+                                configValues.get(0).getValue()));
+                    }
+                }
+                if(!validateAll){
+                    break;
+                }
+            }
+        }
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder b = new StringBuilder();
+        b.append(getClass().getSimpleName()).append("{\n");
+        b.append("  key       : ").append(getKey()).append('\n');
+        b.append("  required  : ").append(isRequired()).append('\n');
+        b.append("  expression: ").append(regEx).append("\n}\n");
+        return b.toString();
+    }
+
+}
diff --git a/validation/src/main/java/org/apache/tamaya/validation/spi/SectionModel.java b/validation/src/main/java/org/apache/tamaya/validation/spi/SectionModel.java
deleted file mode 100644
index 79ee50e..0000000
--- a/validation/src/main/java/org/apache/tamaya/validation/spi/SectionModel.java
+++ /dev/null
@@ -1,202 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.spi;
-
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.validation.ConfigModel;
-import org.apache.tamaya.validation.ModelTarget;
-import org.apache.tamaya.validation.Validation;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
-
-/**
- * Default configuration Model for a configuration section.
- */
-public class SectionModel extends GroupModel {
-
-    /**
-     * Creates a new builder.
-     * @param owner owner, not null.
-     * @param name the section name.
-     * @return a new builder instance.
-     */
-    public static Builder builder(String owner, String name){
-        return new Builder(owner, name);
-    }
-
-    /**
-     * Creates a section validation for the given section.
-     * @param owner owner, not null.
-     * @param name the fully qualified section name
-     * @param required flag, if the section is required to be present.
-     * @return the ConfigModel instance
-     */
-    public static ConfigModel of(String owner, String name, boolean required){
-        return new Builder(owner, name).setRequired(required).build();
-    }
-
-    /**
-     * Creates a section validation for the given section.
-     * @param owner owner, not null.
-     * @param name the fully qualified section name
-     * @param required flag, if the section is required to be present.
-     * @param configModels additional configModels
-     * @return a new builder, never null.
-     */
-    public static ConfigModel of(String owner, String name, boolean required, ConfigModel... configModels){
-        return new Builder(owner, name).setRequired(required).addValidations(configModels).build();
-    }
-
-    /**
-     * Internal constructor.
-     * @param builder the builder, not null.
-     */
-    protected SectionModel(Builder builder) {
-        super(builder.owner, builder.name, builder.childConfigModels);
-    }
-
-    @Override
-    public ModelTarget getType(){
-        return ModelTarget.Section;
-    }
-
-    @Override
-    public Collection<Validation> validate(Configuration config) {
-        Map<String,String> map = config.getProperties();
-        String lookupKey = getName() + '.';
-        boolean present = false;
-        for(String key:map.keySet()){
-            if(key.startsWith("_")){
-                continue;
-            }
-            if(key.startsWith(lookupKey)){
-                present = true;
-                break;
-            }
-        }
-        List<Validation> result = new ArrayList<>(1);
-        if(isRequired() && !present) {
-            result.add(Validation.createMissing(this));
-        }
-        result.addAll(super.validate(config));
-        return result;
-    }
-
-    @Override
-    public String toString() {
-        StringBuilder b = new StringBuilder();
-        b.append(getType()).append(": ").append(getName());
-        if(isRequired()) {
-            b.append(", required: " ).append(isRequired());
-        }
-        for(ConfigModel val:getValidations()){
-             b.append(", ").append(val.toString());
-        }
-        return b.toString();
-    }
-
-    /**
-     * Builder for setting up a AreaConfigModel instance.
-     */
-    public static class Builder{
-        /** The section owner. */
-        private String owner;
-        /** The section name. */
-        private String name;
-        /** The optional description. */
-        private String description;
-        /** The required flag. */
-        private boolean required;
-        /** The (optional) custom validations.*/
-        private final List<ConfigModel> childConfigModels = new ArrayList<>();
-
-        /**
-         * Creates a new Builder.
-         * @param owner owner, not null.
-         * @param sectionName the section name, not null.
-         */
-        public Builder(String owner, String sectionName){
-            this.owner = Objects.requireNonNull(owner);
-            this.name = Objects.requireNonNull(sectionName);
-        }
-
-        /**
-         * Add configModels.
-         * @param configModels the configModels, not null.
-         * @return the Builder for chaining.
-         */
-        public Builder addValidations(ConfigModel... configModels){
-            this.childConfigModels.addAll(Arrays.asList(configModels));
-            return this;
-        }
-
-        /**
-         * Add configModels.
-         * @param configModels the configModels, not null.
-         * @return the Builder for chaining.
-         */
-        public Builder addValidations(Collection<ConfigModel> configModels){
-            this.childConfigModels.addAll(configModels);
-            return this;
-        }
-
-        /**
-         * Sets the required flag.
-         * @param required zhe flag.
-         * @return the Builder for chaining.
-         */
-        public Builder setRequired(boolean required){
-            this.required = required;
-            return this;
-        }
-
-        /**
-         * Set the )optional) description.
-         * @param description the description.
-         * @return the Builder for chaining.
-         */
-        public Builder setDescription(String description){
-            this.description = description;
-            return this;
-        }
-
-        /**
-         * Set the section name
-         * @param name the section name, not null.
-         * @return the Builder for chaining.
-         */
-        public Builder setName(String name){
-            this.name = Objects.requireNonNull(name);
-            return this;
-        }
-
-        /**
-         * Build a new ConfigModel instance.
-         * @return the new ConfigModel instance, not null.
-         */
-        public ConfigModel build(){
-            return new SectionModel(this);
-        }
-    }
-}
diff --git a/validation/src/test/java/org/apache/tamaya/validation/ConfigModelProviderTest.java b/validation/src/test/java/org/apache/tamaya/validation/ConfigModelProviderTest.java
deleted file mode 100644
index 8edf50d..0000000
--- a/validation/src/test/java/org/apache/tamaya/validation/ConfigModelProviderTest.java
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation;
-
-import org.apache.tamaya.validation.spi.SectionModel;
-import org.apache.tamaya.validation.spi.ParameterModel;
-import org.apache.tamaya.validation.spi.GroupModel;
-import org.apache.tamaya.validation.spi.ModelProviderSpi;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-
-
-/**
- * Created by Anatole on 09.08.2015.
- */
-public class ConfigModelProviderTest implements ModelProviderSpi {
-
-    private List<ConfigModel> configModels = new ArrayList<>(1);
-
-    public ConfigModelProviderTest(){
-        configModels.add(new TestConfigModel());
-        configModels = Collections.unmodifiableList(configModels);
-    }
-
-    public Collection<ConfigModel> getConfigModels() {
-        return configModels;
-    }
-
-    private static final class TestConfigModel extends GroupModel {
-
-        public TestConfigModel(){
-            super("TestConfigModel", "TestConfig", new SectionModel.Builder("TestConfigModel",
-                    "a.test.existing").setRequired(true).build(),
-                    ParameterModel.of("TestConfigModel", "a.test.existing.aParam", true),
-                    ParameterModel.of("TestConfigModel", "a.test.existing.optionalParam"),
-                    ParameterModel.of("TestConfigModel", "a.test.existing.aABCParam", false, "[ABC].*"),
-                    new SectionModel.Builder("TestConfigModel", "a.test.notexisting").setRequired(true).build(),
-                    ParameterModel.of("TestConfigModel", "a.test.notexisting.aParam", true),
-                    ParameterModel.of("TestConfigModel", "a.test.notexisting.optionalParam"),
-                    ParameterModel.of("TestConfigModel", "a.test.existing.aABCParam2", false, "[ABC].*"));
-        }
-        @Override
-        public String getName() {
-            return "TestConfigConfigModel";
-        }
-
-    }
-
-}
diff --git a/validation/src/test/java/org/apache/tamaya/validation/ValidationTests.java b/validation/src/test/java/org/apache/tamaya/validation/ValidationTests.java
deleted file mode 100644
index bca328c..0000000
--- a/validation/src/test/java/org/apache/tamaya/validation/ValidationTests.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation;
-
-import org.apache.tamaya.Configuration;
-import org.junit.Test;
-
-/**
- * Created by Anatole on 10.08.2015.
- */
-public class ValidationTests {
-
-    @Test
-    public void testValidate_Config(){
-        System.err.println(ConfigModelManager.validate(Configuration.current()));
-    }
-
-    @Test
-    public void testAllValidations(){
-        System.err.println(ConfigModelManager.getModels());
-    }
-
-    @Test
-    public void testConfigInfo(){
-        System.err.println(ConfigModelManager.getConfigModelDescription(ConfigModelManager.getModels()));
-    }
-
-    @Test
-    public void testValidateAll(){
-        System.err.println("Including UNDEFINED: \n" + ConfigModelManager.validate(Configuration.current(), true));
-    }
-
-    @Test
-    public void testModels(){
-        System.err.println("MODELS: " +ConfigModelManager.getModels());
-    }
-}
diff --git a/validation/src/test/java/org/apache/tamaya/validation/internal/ConfigDocumentationBeanTest.java b/validation/src/test/java/org/apache/tamaya/validation/internal/ConfigDocumentationBeanTest.java
deleted file mode 100644
index b6a1203..0000000
--- a/validation/src/test/java/org/apache/tamaya/validation/internal/ConfigDocumentationBeanTest.java
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * 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 createObject 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.tamaya.validation.internal;
-
-import org.apache.tamaya.validation.ModelTarget;
-import org.junit.Test;
-
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
-
-/**
- * Created by Anatole on 19.08.2015.
- */
-public class ConfigDocumentationBeanTest {
-
-    private final ConfigDocumentationBean mbean = new ConfigDocumentationBean();
-
-    @Test
-    public void testValidate_NoUnknowns() throws Exception {
-        String results = mbean.validate(false);
-        assertNotNull(results);
-        assertFalse(results.trim().isEmpty());
-        assertTrue(results.contains("\"target\":\"Parameter\""));
-        assertTrue(results.contains("\"result\":\"MISSING\""));
-        assertFalse(results.contains("\"description\":\"Undefined key: "));
-        assertFalse(results.contains(" \"result\":\"UNDEFINED\""));
-    }
-
-    @Test
-    public void testValidate_WithUnknowns() throws Exception {
-        String results = mbean.validate(true);
-        assertNotNull(results);
-        assertFalse(results.trim().isEmpty());
-        // test transitive excludes createObject default sys properties
-        assertFalse(results.contains("\"name\":\"java"));
-        assertFalse(results.contains("\"name\":\"sun."));
-        assertFalse(results.contains("\"name\":\"file."));
-        // test others
-        assertTrue(results.contains("\"target\":\"Parameter\""));
-        assertTrue(results.contains("\"target\":\"Section\""));
-        assertTrue(results.contains("\"result\":\"MISSING\""));
-        assertTrue(results.contains("\"description\":\"Undefined key: "));
-        assertTrue(results.contains(" \"result\":\"UNDEFINED\""));
-    }
-
-    @Test
-    public void testGetConfigurationModel() throws Exception {
-        String results = mbean.getConfigurationModel();
-        assertNotNull(results);
-        assertFalse(results.trim().isEmpty());
-        assertTrue(results.contains("\"target\":\"Parameter\""));
-        assertTrue(results.contains("\"name\":\"MyNumber\""));
-        assertTrue(results.contains("\"name\":\"a.b.c\""));
-        assertTrue(results.contains("\"required\":true"));
-    }
-
-    @Test
-    public void testGetConfigurationModel_WithSection() throws Exception {
-        String results = mbean.getConfigurationModel(ModelTarget.Parameter);
-        assertNotNull(results);
-        assertFalse(results.trim().isEmpty());
-        assertTrue(results.contains("\"target\":\"Parameter\""));
-        assertFalse(results.contains("\"target\":\"Section\""));
-        assertTrue(results.contains("\"required\":true"));
-    }
-
-    @Test
-    public void testFindConfigurationModels() throws Exception {
-        String results = mbean.findConfigurationModels("a");
-        assertNotNull(results);
-        assertFalse(results.trim().isEmpty());
-        assertFalse(results.contains("\"target\":\"Parameter\""));
-        assertTrue(results.contains("\"target\":\"Section\""));
-    }
-
-    @Test
-    public void testFindValidationModels() throws Exception {
-        String results = mbean.findValidationModels("a", ModelTarget.Section);
-        assertNotNull(results);
-        assertFalse(results.trim().isEmpty());
-        assertFalse(results.contains("\"target\":\"Parameter\""));
-        assertTrue(results.contains("\"target\":\"Section\""));
-        System.out.println(results);
-    }
-
-    @Test
-    public void testToString() throws Exception {
-        String toString = mbean.toString();
-        System.out.println(toString);
-    }
-}
\ No newline at end of file
diff --git a/validation/src/test/java/test/model/TestConfigAccessor.java b/validation/src/test/java/test/model/TestConfigAccessor.java
deleted file mode 100644
index 6ccc6fe..0000000
--- a/validation/src/test/java/test/model/TestConfigAccessor.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * 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 createObject 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 test.model;
-
-import org.apache.tamaya.Configuration;
-import org.apache.tamaya.ConfigurationProvider;
-
-import java.util.Map;
-
-/**
- * Created by atsticks on 30.04.16.
- */
-public final class TestConfigAccessor {
-
-    private TestConfigAccessor(){}
-
-    public static Map<String,String> readAllProperties(){
-        return Configuration.current()
-                .getProperties();
-    }
-
-    public static Configuration readConfiguration(){
-        return Configuration.current();
-    }
-
-    public static String readProperty(Configuration config, String key){
-        return config.get(key);
-    }
-}