You are viewing a plain text version of this content. The canonical link for it is here.
Posted to notifications@freemarker.apache.org by sg...@apache.org on 2020/02/29 15:22:39 UTC

[freemarker-generator] branch master updated: FREEMARKER-134 Rename "Document" to "Datasource" (#6)

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

sgoeschl pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/freemarker-generator.git


The following commit(s) were added to refs/heads/master by this push:
     new 0b594a3  FREEMARKER-134 Rename "Document" to "Datasource" (#6)
0b594a3 is described below

commit 0b594a3d35a8d7283a454a02bead317cd3c808fb
Author: Siegfried Goeschl <si...@gmail.com>
AuthorDate: Sat Feb 29 16:22:30 2020 +0100

    FREEMARKER-134 Rename "Document" to "Datasource" (#6)
---
 freemarker-generator-base/README.md                |   6 +-
 .../generator/base/FreeMarkerConstants.java        |   6 +-
 .../Document.java => datasource/Datasource.java}   |  32 ++---
 .../DatasourceFactory.java}                        |  24 ++--
 .../Documents.java => datasource/Datasources.java} |  74 +++++------
 .../DatasourcesSupplier.java}                      |  20 +--
 .../datasource/DatasourceFactoryTest.java          |  83 ++++++++++++
 .../generator/datasource/DatasourceTest.java       | 146 +++++++++++++++++++++
 .../DatasourcesSupplierTest.java}                  |  20 +--
 .../generator/datasource/DatasourcesTest.java      | 117 +++++++++++++++++
 .../{document => datasource}/UriTest.java          |   2 +-
 .../generator/document/DocumentFactoryTest.java    |  83 ------------
 .../generator/document/DocumentTest.java           | 146 ---------------------
 .../generator/document/DocumentsTest.java          | 117 -----------------
 freemarker-generator-cli/README.md                 |  95 +++++++-------
 freemarker-generator-cli/run-samples.sh            |   6 +-
 .../org/apache/freemarker/generator/cli/Main.java  |   8 +-
 .../freemarker/generator/cli/config/Suppliers.java |   6 +-
 .../generator/cli/task/FreeMarkerTask.java         |  36 ++---
 .../src/main/scripts/run-samples.sh                |   6 +-
 .../freemarker/generator/cli/ExamplesTest.java     |   6 +-
 .../freemarker/generator/cli/ManualTest.java       |   6 +-
 .../src/test/templates/echo.ftl                    |   6 +-
 .../src/test/templates/tools/csv.ftl               |   2 +-
 .../templates/accesslog/combined-access.ftl        |   4 +-
 freemarker-generator-cli/templates/cat.ftl         |   2 +-
 .../templates/csv/csv/gatling-user-credentials.ftl |   4 +-
 .../templates/csv/fo/transactions.ftl              |   6 +-
 .../templates/csv/fo/transform.ftl                 |   2 +-
 .../templates/csv/html/transactions.ftl            |   6 +-
 .../templates/csv/html/transform.ftl               |   6 +-
 .../templates/csv/md/filter.ftl                    |  14 +-
 .../templates/csv/md/transform.ftl                 |   2 +-
 .../templates/csv/shell/curl.ftl                   |   2 +-
 .../templates/csv/transform.ftl                    |   6 +-
 freemarker-generator-cli/templates/demo.ftl        |  28 ++--
 .../templates/excel/csv/custom.ftl                 |   4 +-
 .../templates/excel/csv/transform.ftl              |   4 +-
 .../templates/excel/html/transform.ftl             |  10 +-
 .../templates/excel/md/transform.ftl               |   8 +-
 .../templates/html/csv/dependencies.ftl            |   6 +-
 freemarker-generator-cli/templates/info.ftl        |   6 +-
 .../templates/json/csv/swagger-endpoints.ftl       |   2 +-
 .../templates/json/md/github-users.ftl             |   2 +-
 .../templates/properties/csv/locker-test-users.ftl |   4 +-
 .../templates/tsv/fo/transactions.ftl              |   2 +-
 .../templates/xml/txt/recipients.ftl               |   2 +-
 .../templates/yaml/txt/transform.ftl               |   2 +-
 freemarker-generator-tools/README.md               |   4 +-
 freemarker-generator-tools/pom.xml                 |   2 +-
 .../generator/tools/commonscsv/CommonsCSVTool.java |  20 +--
 .../generator/tools/excel/ExcelTool.java           |  12 +-
 .../generator/tools/jsonpath/JsonPathTool.java     |   6 +-
 .../generator/tools/jsoup/JsoupTool.java           |  10 +-
 .../generator/tools/properties/PropertiesTool.java |   8 +-
 .../generator/tools/snakeyaml/SnakeYamlTool.java   |   8 +-
 .../freemarker/generator/tools/xml/XmlTool.java    |  10 +-
 .../tools/commonscsv/CommonsCSVToolTest.java       |  26 ++--
 .../generator/tools/excel/ExcelToolTest.java       |  10 +-
 .../tools/properties/PropertiesToolTest.java       |  14 +-
 .../tools/snakeyaml/SnakeYamlToolTest.java         |  14 +-
 .../generator/tools/xml/XmlToolTest.java           |  14 +-
 62 files changed, 672 insertions(+), 673 deletions(-)

diff --git a/freemarker-generator-base/README.md b/freemarker-generator-base/README.md
index 9dd180d..3a17212 100644
--- a/freemarker-generator-base/README.md
+++ b/freemarker-generator-base/README.md
@@ -2,8 +2,8 @@
 
 This module provides common functionality for `freemarker-generator-cli` and `freemarker-generator-maven-plugin` such as
 
-* Various implementation of `DataSources`
-* Implementation of `Document` and utitity methods
-* Creating `Documents` 
+* Various implementation of `javax.activation.DataSources`
+* Implementation of `Datasource` and utitity methods
+* Creating `Datasources` 
 
 The code actually does not depend on Apache FreeMarker since it useful for other command line tools as well.
\ No newline at end of file
diff --git a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/FreeMarkerConstants.java b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/FreeMarkerConstants.java
index ab6a11f..94508d1 100644
--- a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/FreeMarkerConstants.java
+++ b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/FreeMarkerConstants.java
@@ -17,8 +17,8 @@ public class FreeMarkerConstants {
     /** Content type for binary data */
     public static final String APPLICATION_OCTET_STREAM = "application/octet-stream";
 
-    /** Unknown length for a <code>Document </code> */
-    public static final int DOCUMENT_UNKNOWN_LENGTH = -1;
+    /** Unknown length for a <code>Datasource</code> */
+    public static final int DATASOURCE_UNKNOWN_LENGTH = -1;
 
     /** Default locale for rendering templates */
     public static final Locale DEFAULT_LOCALE = US;
@@ -59,7 +59,7 @@ public class FreeMarkerConstants {
         private Model() {
         }
 
-        public static final String DOCUMENTS = "Documents";
+        public static final String DATASOURCES = "Datasources";
 
         public static final String FREEMARKER_CLI_ARGS = "freemarker.cli.args";
         public static final String FREEMARKER_LOCALE = "freemarker.locale";
diff --git a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/Document.java b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/Datasource.java
similarity index 87%
rename from freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/Document.java
rename to freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/Datasource.java
index 6fddd42..5de9cae 100644
--- a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/Document.java
+++ b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/Datasource.java
@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.freemarker.generator.base.document;
+package org.apache.freemarker.generator.base.datasource;
 
 import org.apache.commons.io.FilenameUtils;
 import org.apache.commons.io.IOUtils;
@@ -35,31 +35,31 @@ import java.util.List;
 import static java.nio.charset.Charset.forName;
 import static java.util.Objects.requireNonNull;
 import static org.apache.commons.io.IOUtils.lineIterator;
-import static org.apache.freemarker.generator.base.FreeMarkerConstants.DOCUMENT_UNKNOWN_LENGTH;
+import static org.apache.freemarker.generator.base.FreeMarkerConstants.DATASOURCE_UNKNOWN_LENGTH;
 
 /**
- * Source document which encapsulates a data source. When accessing
- * content it is loaded on demand on not kept in memory to allow
- * processing of large volumes of data.
+ * Datasource which encapsulates data to be used for rendering
+ * a template. When accessing content it is loaded on demand on not
+ * kept in memory to allow processing of large volumes of data.
  */
-public class Document implements Closeable {
+public class Datasource implements Closeable {
 
-    /** Human-readable name of the document */
+    /** Human-readable name of the datasource */
     private final String name;
 
     /** Charset for directly accessing text-based content */
     private final Charset charset;
 
-    /** The data source */
+    /** The underlying "javax.activation.DataSource" */
     private final DataSource dataSource;
 
     /** The location of the content, e.g. file name */
     private final String location;
 
-    /** Collect all closables handed out to the caller to be closed when the document is closed itself */
+    /** Collect all closables handed out to the caller to be closed when the datasource is closed itself */
     private final CloseableReaper closables;
 
-    public Document(String name, DataSource dataSource, String location, Charset charset) {
+    public Datasource(String name, DataSource dataSource, String location, Charset charset) {
         this.name = requireNonNull(name);
         this.dataSource = requireNonNull(dataSource);
         this.location = requireNonNull(location);
@@ -90,7 +90,7 @@ public class Document implements Closeable {
     /**
      * Try to get the length lazily, efficient and without consuming the input stream.
      *
-     * @return Length of document or UNKNOWN_LENGTH
+     * @return Length of datasource or UNKNOWN_LENGTH
      */
     public long getLength() {
         if (dataSource instanceof FileDataSource) {
@@ -100,12 +100,12 @@ public class Document implements Closeable {
         } else if (dataSource instanceof ByteArrayDataSource) {
             return ((ByteArrayDataSource) dataSource).length();
         } else {
-            return DOCUMENT_UNKNOWN_LENGTH;
+            return DATASOURCE_UNKNOWN_LENGTH;
         }
     }
 
     /**
-     * Get an input stream which is closed together with this document.
+     * Get an input stream which is closed together with this datasource.
      *
      * @return InputStream
      * @throws IOException Operation failed
@@ -193,8 +193,8 @@ public class Document implements Closeable {
 
     /**
      * Some tools create a {@link java.io.Closeable} which can bound to the
-     * lifecycle of the document. When the document is closed all the bound
-     * {@link java.io.Closeable} are closed as well.
+     * lifecycle of the datasource. When the datasource is closed all the
+     * associated {@link java.io.Closeable} are closed as well.
      *
      * @param closeable Closable
      * @param <T>       Type of closable
@@ -211,7 +211,7 @@ public class Document implements Closeable {
 
     @Override
     public String toString() {
-        return "Document{" +
+        return "Datasource{" +
                 "name='" + name + '\'' +
                 ", location=" + location +
                 ", charset='" + charset + '\'' +
diff --git a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/DocumentFactory.java b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/DatasourceFactory.java
similarity index 75%
rename from freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/DocumentFactory.java
rename to freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/DatasourceFactory.java
index de4ed51..c54aa4e 100644
--- a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/DocumentFactory.java
+++ b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/DatasourceFactory.java
@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.freemarker.generator.base.document;
+package org.apache.freemarker.generator.base.datasource;
 
 import org.apache.freemarker.generator.base.FreeMarkerConstants.Location;
 import org.apache.freemarker.generator.base.activation.ByteArrayDataSource;
@@ -32,45 +32,45 @@ import java.nio.charset.Charset;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
 /**
- * Creates a document from various sources.
+ * Creates a Datasource from various sources.
  */
-public class DocumentFactory {
+public class DatasourceFactory {
 
-    private DocumentFactory() {
+    private DatasourceFactory() {
     }
 
-    public static Document create(URL url) {
+    public static Datasource create(URL url) {
         final String location = url.getProtocol() + "://" + url.getHost();
         final URLDataSource dataSource = new URLDataSource(url);
         return create(url.getHost(), dataSource, location, UTF_8);
     }
 
-    public static Document create(String name, String content) {
+    public static Datasource create(String name, String content) {
         final StringDataSource dataSource = new StringDataSource(name, content, UTF_8);
         return create(name, dataSource, Location.STRING, UTF_8);
     }
 
-    public static Document create(File file, Charset charset) {
+    public static Datasource create(File file, Charset charset) {
         final FileDataSource dataSource = new FileDataSource(file);
         return create(file.getName(), dataSource, file.getAbsolutePath(), charset);
     }
 
-    public static Document create(String name, byte[] content) {
+    public static Datasource create(String name, byte[] content) {
         final ByteArrayDataSource dataSource = new ByteArrayDataSource(name, content);
         return create(name, dataSource, Location.BYTES, UTF_8);
     }
 
-    public static Document create(String name, InputStream is, Charset charset) {
+    public static Datasource create(String name, InputStream is, Charset charset) {
         final InputStreamDataSource dataSource = new InputStreamDataSource(name, is);
         return create(name, dataSource, Location.INPUTSTREAM, charset);
     }
 
-    public static Document create(String name, InputStream is, String location, Charset charset) {
+    public static Datasource create(String name, InputStream is, String location, Charset charset) {
         final InputStreamDataSource dataSource = new InputStreamDataSource(name, is);
         return create(name, dataSource, location, charset);
     }
 
-    public static Document create(String name, DataSource dataSource, String location, Charset charset) {
-        return new Document(name, dataSource, location, charset);
+    public static Datasource create(String name, DataSource dataSource, String location, Charset charset) {
+        return new Datasource(name, dataSource, location, charset);
     }
 }
diff --git a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/Documents.java b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/Datasources.java
similarity index 50%
rename from freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/Documents.java
rename to freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/Datasources.java
index c1c4680..51d2804 100644
--- a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/Documents.java
+++ b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/Datasources.java
@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.freemarker.generator.base.document;
+package org.apache.freemarker.generator.base.datasource;
 
 import org.apache.freemarker.generator.base.util.ClosableUtils;
 
@@ -27,98 +27,98 @@ import static java.util.stream.Collectors.toList;
 import static org.apache.commons.io.FilenameUtils.wildcardMatch;
 
 /**
- * Container for documents with a couple of convenience functions to select
- * a subset of documents.
+ * Container for datasources with a couple of convenience functions to select
+ * a subset of datasources.
  */
-public class Documents implements Closeable {
+public class Datasources implements Closeable {
 
-    private final List<Document> documents;
+    private final List<Datasource> datasources;
 
-    public Documents(Collection<Document> documents) {
-        this.documents = new ArrayList<>(documents);
+    public Datasources(Collection<Datasource> datasources) {
+        this.datasources = new ArrayList<>(datasources);
     }
 
     /**
-     * Get the names of all documents.
+     * Get the names of all datasources.
      *
-     * @return document names
+     * @return datasource names
      */
     public List<String> getNames() {
-        return documents.stream()
-                .map(Document::getName)
+        return datasources.stream()
+                .map(Datasource::getName)
                 .collect(toList());
     }
 
     public int size() {
-        return documents.size();
+        return datasources.size();
     }
 
     public boolean isEmpty() {
-        return documents.isEmpty();
+        return datasources.isEmpty();
     }
 
-    public Document getFirst() {
-        return documents.get(0);
+    public Datasource getFirst() {
+        return datasources.get(0);
     }
 
-    public List<Document> getList() {
-        return new ArrayList<>(documents);
+    public List<Datasource> getList() {
+        return new ArrayList<>(datasources);
     }
 
-    public Document get(int index) {
-        return documents.get(index);
+    public Datasource get(int index) {
+        return datasources.get(index);
     }
 
-    public boolean add(Document document) {
-        return documents.add(document);
+    public boolean add(Datasource datasource) {
+        return datasources.add(datasource);
     }
 
-    public Document remove(int index) {
-        return documents.remove(index);
+    public Datasource remove(int index) {
+        return datasources.remove(index);
     }
 
     /**
-     * Get exactly one document. If not exactly one document
+     * Get exactly one datasource. If not exactly one datasource
      * is found an exception is thrown.
      *
-     * @param name name of the document
-     * @return document
+     * @param name name of the datasource
+     * @return datasource
      */
-    public Document get(String name) {
-        final List<Document> list = find(name);
+    public Datasource get(String name) {
+        final List<Datasource> list = find(name);
 
         if (list.isEmpty()) {
-            throw new IllegalArgumentException("Document not found : " + name);
+            throw new IllegalArgumentException("Datasource not found : " + name);
         }
 
         if (list.size() > 1) {
-            throw new IllegalArgumentException("More than one document found : " + name);
+            throw new IllegalArgumentException("More than one datasource found : " + name);
         }
 
         return list.get(0);
     }
 
     /**
-     * Find document based on theit name and globbing pattern.
+     * Find datasources based on their name and globbing pattern.
      *
      * @param wildcard globbing pattern
-     * @return list of mathching documents
+     * @return list of mathching datasources
      */
-    public List<Document> find(String wildcard) {
-        return documents.stream()
+    public List<Datasource> find(String wildcard) {
+        return datasources.stream()
                 .filter(d -> wildcardMatch(d.getName(), wildcard))
                 .collect(toList());
     }
 
     @Override
     public void close() {
-        documents.forEach(ClosableUtils::closeQuietly);
+        datasources.forEach(ClosableUtils::closeQuietly);
     }
 
     @Override
     public String toString() {
-        return "Documents{" +
-                "documents=" + documents +
+        return "Datasources{" +
+                "datasources=" + datasources +
                 '}';
     }
 }
diff --git a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/DocumentsSupplier.java b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/DatasourcesSupplier.java
similarity index 81%
rename from freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/DocumentsSupplier.java
rename to freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/DatasourcesSupplier.java
index e4b85a9..3e5a686 100644
--- a/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/document/DocumentsSupplier.java
+++ b/freemarker-generator-base/src/main/java/org/apache/freemarker/generator/base/datasource/DatasourcesSupplier.java
@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.freemarker.generator.base.document;
+package org.apache.freemarker.generator.base.datasource;
 
 import org.apache.freemarker.generator.base.file.RecursiveFileSupplier;
 
@@ -31,10 +31,10 @@ import static java.util.Objects.requireNonNull;
 import static java.util.stream.Collectors.toList;
 
 /**
- * Create a list of <code>Document</code> based on a list of sources consisting of
+ * Create a list of <code>Datasource</code> based on a list of sources consisting of
  * URLs, directories and files.
  */
-public class DocumentsSupplier implements Supplier<List<Document>> {
+public class DatasourcesSupplier implements Supplier<List<Datasource>> {
 
     /** List of source files and/or directories */
     private final Collection<String> sources;
@@ -55,7 +55,7 @@ public class DocumentsSupplier implements Supplier<List<Document>> {
      * @param include Optional include pattern for resolving source files or directory
      * @param charset The charset for loading text files
      */
-    public DocumentsSupplier(Collection<String> sources, String include, String exclude, Charset charset) {
+    public DatasourcesSupplier(Collection<String> sources, String include, String exclude, Charset charset) {
         this.sources = new ArrayList<>(sources);
         this.include = include;
         this.exclude = exclude;
@@ -63,14 +63,14 @@ public class DocumentsSupplier implements Supplier<List<Document>> {
     }
 
     @Override
-    public List<Document> get() {
+    public List<Datasource> get() {
         return sources.stream()
                 .map(this::get)
                 .flatMap(Collection::stream)
                 .collect(toList());
     }
 
-    private List<Document> get(String source) {
+    private List<Datasource> get(String source) {
         if (isHttpUrl(source)) {
             return singletonList(resolveHttpUrl(source));
         } else {
@@ -78,13 +78,13 @@ public class DocumentsSupplier implements Supplier<List<Document>> {
         }
     }
 
-    private static Document resolveHttpUrl(String url) {
-        return DocumentFactory.create(toUrl(url));
+    private static Datasource resolveHttpUrl(String url) {
+        return DatasourceFactory.create(toUrl(url));
     }
 
-    private static List<Document> resolveFile(String source, String include, String exclude, Charset charset) {
+    private static List<Datasource> resolveFile(String source, String include, String exclude, Charset charset) {
         return fileResolver(source, include, exclude).get().stream()
-                .map(file -> DocumentFactory.create(file, charset))
+                .map(file -> DatasourceFactory.create(file, charset))
                 .collect(toList());
     }
 
diff --git a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourceFactoryTest.java b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourceFactoryTest.java
new file mode 100644
index 0000000..677f991
--- /dev/null
+++ b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourceFactoryTest.java
@@ -0,0 +1,83 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.freemarker.generator.datasource;
+
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourceFactory;
+import org.junit.Test;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.Charset;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static junit.framework.TestCase.assertTrue;
+import static org.junit.Assert.assertEquals;
+
+public class DatasourceFactoryTest {
+
+    private static final String ANY_TEXT = "Hello World";
+    private static final String ANY_FILE_NAME = "pom.xml";
+    private static final Charset ANY_CHAR_SET = UTF_8;
+    private static final File ANY_FILE = new File(ANY_FILE_NAME);
+
+    @Test
+    public void shouldCreateFileBasedDatasource() throws IOException {
+        final Datasource datasource = DatasourceFactory.create(ANY_FILE, ANY_CHAR_SET);
+
+        assertEquals(ANY_FILE_NAME, datasource.getName());
+        assertEquals(UTF_8, datasource.getCharset());
+        assertEquals(ANY_FILE.getAbsolutePath(), datasource.getLocation());
+        assertTrue(!datasource.getLines().isEmpty());
+    }
+
+    @Test
+    public void shouldCreateStringBasedDatasource() throws IOException {
+        final Datasource datasource = DatasourceFactory.create("test.txt", ANY_TEXT);
+
+        assertEquals("test.txt", datasource.getName());
+        assertEquals(UTF_8, datasource.getCharset());
+        assertEquals("string", datasource.getLocation());
+        assertEquals(ANY_TEXT, datasource.getText());
+        assertEquals(1, datasource.getLines().size());
+    }
+
+    @Test
+    public void shouldCreateByteArrayBasedDatasource() throws IOException {
+        final Datasource datasource = DatasourceFactory.create("test.txt", ANY_TEXT.getBytes(UTF_8));
+
+        assertEquals("test.txt", datasource.getName());
+        assertEquals(UTF_8, datasource.getCharset());
+        assertEquals("bytes", datasource.getLocation());
+        assertEquals(ANY_TEXT, datasource.getText());
+        assertEquals(1, datasource.getLines().size());
+    }
+
+    @Test
+    public void shouldCreateInputStreamBasedDatasource() throws IOException {
+        final InputStream is = new ByteArrayInputStream(ANY_TEXT.getBytes(UTF_8));
+        final Datasource datasource = DatasourceFactory.create("test.txt", is, UTF_8);
+
+        assertEquals("test.txt", datasource.getName());
+        assertEquals(UTF_8, datasource.getCharset());
+        assertEquals("inputstream", datasource.getLocation());
+        assertEquals(ANY_TEXT, datasource.getText());
+    }
+
+}
diff --git a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourceTest.java b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourceTest.java
new file mode 100644
index 0000000..878dd2c
--- /dev/null
+++ b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourceTest.java
@@ -0,0 +1,146 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.freemarker.generator.datasource;
+
+import org.apache.commons.io.LineIterator;
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourceFactory;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import java.io.Closeable;
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.nio.charset.Charset;
+import java.util.Iterator;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class DatasourceTest {
+
+    private static final String ANY_TEXT = "Hello World";
+    private static final String ANY_FILE_NAME = "pom.xml";
+    private static final Charset ANY_CHAR_SET = UTF_8;
+    private static final File ANY_FILE = new File(ANY_FILE_NAME);
+
+    @Test
+    public void shouldSupportTextDatasource() throws IOException {
+        try (Datasource datasource = DatasourceFactory.create("stdin", ANY_TEXT)) {
+            assertEquals("stdin", datasource.getName());
+            assertEquals("stdin", datasource.getBaseName());
+            assertEquals("", datasource.getExtension());
+            assertEquals("string", datasource.getLocation());
+            assertEquals(UTF_8, datasource.getCharset());
+            assertTrue(datasource.getLength() > 0);
+            assertEquals(ANY_TEXT, datasource.getText());
+        }
+    }
+
+    @Test
+    public void shouldSupportFileDatasource() throws IOException {
+        try (Datasource datasource = DatasourceFactory.create(ANY_FILE, ANY_CHAR_SET)) {
+            assertEquals(ANY_FILE_NAME, datasource.getName());
+            assertEquals("pom", datasource.getBaseName());
+            assertEquals("xml", datasource.getExtension());
+            assertEquals(ANY_FILE.getAbsolutePath(), datasource.getLocation());
+            assertEquals(Charset.defaultCharset(), datasource.getCharset());
+            assertTrue(datasource.getLength() > 0);
+            assertFalse(datasource.getText().isEmpty());
+        }
+    }
+
+    @Ignore
+    @Test
+    public void shouldSupportUrlDatasource() throws IOException {
+        try (Datasource datasource = DatasourceFactory.create(new URL("https://google.com?foo=bar"))) {
+            assertEquals("google.com", datasource.getName());
+            assertEquals("google", datasource.getBaseName());
+            assertEquals("com", datasource.getExtension());
+            assertEquals("https://google.com", datasource.getLocation());
+            assertEquals(UTF_8, datasource.getCharset());
+            assertEquals(-1, datasource.getLength());
+            assertFalse(datasource.getText().isEmpty());
+        }
+    }
+
+    @Test
+    public void shouldSupportLineIterator() throws IOException {
+        try (Datasource datasource = textDatasource()) {
+            try (LineIterator iterator = datasource.getLineIterator(ANY_CHAR_SET.name())) {
+                assertEquals(1, count(iterator));
+            }
+        }
+    }
+
+    @Test
+    public void shouldReadLines() throws IOException {
+        try (Datasource datasource = textDatasource()) {
+            assertEquals(1, datasource.getLines().size());
+            assertEquals(ANY_TEXT, datasource.getLines().get(0));
+        }
+    }
+
+    @Test
+    public void shouldGetBytes() throws IOException {
+        try (Datasource datasource = textDatasource()) {
+            assertEquals(11, datasource.getBytes().length);
+        }
+    }
+
+    @Test
+    public void shouldCloseDatasource() {
+        final Datasource datasource = textDatasource();
+        final TestClosable closable1 = datasource.addClosable(new TestClosable());
+        final TestClosable closable2 = datasource.addClosable(new TestClosable());
+
+        datasource.close();
+
+        assertTrue(closable1.isClosed());
+        assertTrue(closable2.isClosed());
+    }
+
+    private static int count(Iterator<String> iterator) {
+        int count = 0;
+        while (iterator.hasNext()) {
+            count++;
+            iterator.next();
+        }
+        return count;
+    }
+
+    private static Datasource textDatasource() {
+        return DatasourceFactory.create("stdin", ANY_TEXT);
+    }
+
+    private static final class TestClosable implements Closeable {
+
+        private boolean closed = false;
+
+        @Override
+        public void close() throws IOException {
+            closed = true;
+        }
+
+        public boolean isClosed() {
+            return closed;
+        }
+    }
+}
diff --git a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentsSupplierTest.java b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourcesSupplierTest.java
similarity index 85%
rename from freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentsSupplierTest.java
rename to freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourcesSupplierTest.java
index 2a87db1..d06f16f 100644
--- a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentsSupplierTest.java
+++ b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourcesSupplierTest.java
@@ -14,10 +14,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.freemarker.generator.document;
+package org.apache.freemarker.generator.datasource;
 
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentsSupplier;
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourcesSupplier;
 import org.junit.Test;
 
 import java.nio.charset.Charset;
@@ -28,7 +28,7 @@ import static java.util.Collections.singletonList;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 
-public class DocumentsSupplierTest {
+public class DatasourcesSupplierTest {
 
     private static final String NO_EXCLUDE = null;
     private static final String ANY_FILE = "./pom.xml";
@@ -85,8 +85,8 @@ public class DocumentsSupplierTest {
 
     @Test
     public void shouldResolveLargeDirectory() {
-        final List<Document> documents = supplier(".", null, null).get();
-        assertFalse(documents.isEmpty());
+        final List<Datasource> datasources = supplier(".", null, null).get();
+        assertFalse(datasources.isEmpty());
     }
 
     @Test(expected = RuntimeException.class)
@@ -100,11 +100,11 @@ public class DocumentsSupplierTest {
         assertEquals(2, supplier(sources, "*.xml", null).get().size());
     }
 
-    private static DocumentsSupplier supplier(String directory, String include, String exclude) {
-        return new DocumentsSupplier(singletonList(directory), include, exclude, Charset.defaultCharset());
+    private static DatasourcesSupplier supplier(String directory, String include, String exclude) {
+        return new DatasourcesSupplier(singletonList(directory), include, exclude, Charset.defaultCharset());
     }
 
-    private static DocumentsSupplier supplier(List<String> files, String include, String exclude) {
-        return new DocumentsSupplier(files, include, exclude, Charset.defaultCharset());
+    private static DatasourcesSupplier supplier(List<String> files, String include, String exclude) {
+        return new DatasourcesSupplier(files, include, exclude, Charset.defaultCharset());
     }
 }
diff --git a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourcesTest.java b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourcesTest.java
new file mode 100644
index 0000000..b580191
--- /dev/null
+++ b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/DatasourcesTest.java
@@ -0,0 +1,117 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.freemarker.generator.datasource;
+
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourceFactory;
+import org.apache.freemarker.generator.base.datasource.Datasources;
+import org.junit.Test;
+
+import java.io.File;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static java.util.Arrays.asList;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+
+public class DatasourcesTest {
+
+    private static final String UNKNOWN = "unknown";
+    private static final String ANY_TEXT = "Hello World";
+    private static final String ANY_FILE_NAME = "pom.xml";
+    private static final String ANY_FILE_EXTENSION = "xml";
+    private static final File ANY_FILE = new File(ANY_FILE_NAME);
+    private static final String ANY_URL = "https://server.invalid?foo=bar";
+
+    @Test
+    public void shouldFindByWildcard() {
+        final Datasources datasources = datasources();
+
+        assertEquals(0, datasources.find(null).size());
+        assertEquals(0, datasources.find("").size());
+        assertEquals(0, datasources.find("*.bar").size());
+        assertEquals(0, datasources.find("foo.*").size());
+        assertEquals(0, datasources.find("foo.bar").size());
+
+        assertEquals(2, datasources.find("*.*").size());
+        assertEquals(1, datasources.find("*." + ANY_FILE_EXTENSION).size());
+        assertEquals(1, datasources.find("*.???").size());
+        assertEquals(1, datasources.find("*om*").size());
+        assertEquals(1, datasources.find("*o*.xml").size());
+
+        assertEquals(1, datasources.find(ANY_FILE_NAME).size());
+        assertEquals(1, datasources.find(ANY_FILE_NAME.charAt(0) + "*").size());
+
+        assertEquals(3, datasources.find("*").size());
+    }
+
+    @Test
+    public void shouldGetDatasource() {
+        assertNotNull(datasources().get(ANY_FILE_NAME));
+    }
+
+    @Test
+    public void shouldGetAllDatasources() {
+        final Datasources datasources = datasources();
+
+        assertEquals("unknown", datasources().get(0).getName());
+        assertEquals("pom.xml", datasources().get(1).getName());
+        assertEquals("server.invalid", datasources().get(2).getName());
+        assertEquals("unknown", datasources().getFirst().getName());
+        assertEquals(3, datasources.getList().size());
+        assertEquals(3, datasources.size());
+        assertFalse(datasources.isEmpty());
+    }
+
+    @Test
+    public void shouldGetNames() {
+        assertEquals(asList("unknown", "pom.xml", "server.invalid"), datasources().getNames());
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void shouldThrowExceptionWhenGetDoesNotFindDatasource() {
+        datasources().get("file-does-not-exist");
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void shouldThrowExceptionWhenGetFindsMultipleDatasources() {
+        datasources().get("*");
+    }
+
+    private static Datasources datasources() {
+        return new Datasources(asList(textDatasource(), fileDatasource(), urlDatasource()));
+    }
+
+    private static Datasource textDatasource() {
+        return DatasourceFactory.create(UNKNOWN, ANY_TEXT);
+    }
+
+    private static Datasource fileDatasource() {
+        return DatasourceFactory.create(ANY_FILE, UTF_8);
+    }
+
+    private static Datasource urlDatasource() {
+        try {
+            return DatasourceFactory.create(new URL(ANY_URL));
+        } catch (MalformedURLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}
diff --git a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/UriTest.java b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/UriTest.java
similarity index 98%
rename from freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/UriTest.java
rename to freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/UriTest.java
index d6b66b1..bf5f865 100644
--- a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/UriTest.java
+++ b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/datasource/UriTest.java
@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.freemarker.generator.document;
+package org.apache.freemarker.generator.datasource;
 
 import org.junit.Test;
 
diff --git a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentFactoryTest.java b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentFactoryTest.java
deleted file mode 100644
index 172e0c6..0000000
--- a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentFactoryTest.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 of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.freemarker.generator.document;
-
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentFactory;
-import org.junit.Test;
-
-import java.io.ByteArrayInputStream;
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.charset.Charset;
-
-import static java.nio.charset.StandardCharsets.UTF_8;
-import static junit.framework.TestCase.assertTrue;
-import static org.junit.Assert.assertEquals;
-
-public class DocumentFactoryTest {
-
-    private static final String ANY_TEXT = "Hello World";
-    private static final String ANY_FILE_NAME = "pom.xml";
-    private static final Charset ANY_CHAR_SET = UTF_8;
-    private static final File ANY_FILE = new File(ANY_FILE_NAME);
-
-    @Test
-    public void shouldCreateFileBasedDocument() throws IOException {
-        final Document document = DocumentFactory.create(ANY_FILE, ANY_CHAR_SET);
-
-        assertEquals(ANY_FILE_NAME, document.getName());
-        assertEquals(UTF_8, document.getCharset());
-        assertEquals(ANY_FILE.getAbsolutePath(), document.getLocation());
-        assertTrue(!document.getLines().isEmpty());
-    }
-
-    @Test
-    public void shouldCreateStringBasedDocument() throws IOException {
-        final Document document = DocumentFactory.create("test.txt", ANY_TEXT);
-
-        assertEquals("test.txt", document.getName());
-        assertEquals(UTF_8, document.getCharset());
-        assertEquals("string", document.getLocation());
-        assertEquals(ANY_TEXT, document.getText());
-        assertEquals(1, document.getLines().size());
-    }
-
-    @Test
-    public void shouldCreateByteArrayBasedDocument() throws IOException {
-        final Document document = DocumentFactory.create("test.txt", ANY_TEXT.getBytes(UTF_8));
-
-        assertEquals("test.txt", document.getName());
-        assertEquals(UTF_8, document.getCharset());
-        assertEquals("bytes", document.getLocation());
-        assertEquals(ANY_TEXT, document.getText());
-        assertEquals(1, document.getLines().size());
-    }
-
-    @Test
-    public void shouldCreateInputStreamBasedDocument() throws IOException {
-        final InputStream is = new ByteArrayInputStream(ANY_TEXT.getBytes(UTF_8));
-        final Document document = DocumentFactory.create("test.txt", is, UTF_8);
-
-        assertEquals("test.txt", document.getName());
-        assertEquals(UTF_8, document.getCharset());
-        assertEquals("inputstream", document.getLocation());
-        assertEquals(ANY_TEXT, document.getText());
-    }
-
-}
diff --git a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentTest.java b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentTest.java
deleted file mode 100644
index 22d5952..0000000
--- a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentTest.java
+++ /dev/null
@@ -1,146 +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 of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.freemarker.generator.document;
-
-import org.apache.commons.io.LineIterator;
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentFactory;
-import org.junit.Ignore;
-import org.junit.Test;
-
-import java.io.Closeable;
-import java.io.File;
-import java.io.IOException;
-import java.net.URL;
-import java.nio.charset.Charset;
-import java.util.Iterator;
-
-import static java.nio.charset.StandardCharsets.UTF_8;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
-
-public class DocumentTest {
-
-    private static final String ANY_TEXT = "Hello World";
-    private static final String ANY_FILE_NAME = "pom.xml";
-    private static final Charset ANY_CHAR_SET = UTF_8;
-    private static final File ANY_FILE = new File(ANY_FILE_NAME);
-
-    @Test
-    public void shouldSupportTextDocument() throws IOException {
-        try (Document document = DocumentFactory.create("stdin", ANY_TEXT)) {
-            assertEquals("stdin", document.getName());
-            assertEquals("stdin", document.getBaseName());
-            assertEquals("", document.getExtension());
-            assertEquals("string", document.getLocation());
-            assertEquals(UTF_8, document.getCharset());
-            assertTrue(document.getLength() > 0);
-            assertEquals(ANY_TEXT, document.getText());
-        }
-    }
-
-    @Test
-    public void shouldSupportFileDocument() throws IOException {
-        try (Document document = DocumentFactory.create(ANY_FILE, ANY_CHAR_SET)) {
-            assertEquals(ANY_FILE_NAME, document.getName());
-            assertEquals("pom", document.getBaseName());
-            assertEquals("xml", document.getExtension());
-            assertEquals(ANY_FILE.getAbsolutePath(), document.getLocation());
-            assertEquals(Charset.defaultCharset(), document.getCharset());
-            assertTrue(document.getLength() > 0);
-            assertFalse(document.getText().isEmpty());
-        }
-    }
-
-    @Ignore
-    @Test
-    public void shouldSupportUrlDocument() throws IOException {
-        try (Document document = DocumentFactory.create(new URL("https://google.com?foo=bar"))) {
-            assertEquals("google.com", document.getName());
-            assertEquals("google", document.getBaseName());
-            assertEquals("com", document.getExtension());
-            assertEquals("https://google.com", document.getLocation());
-            assertEquals(UTF_8, document.getCharset());
-            assertEquals(-1, document.getLength());
-            assertFalse(document.getText().isEmpty());
-        }
-    }
-
-    @Test
-    public void shouldSupportLineIterator() throws IOException {
-        try (Document document = textDocument()) {
-            try (LineIterator iterator = document.getLineIterator(ANY_CHAR_SET.name())) {
-                assertEquals(1, count(iterator));
-            }
-        }
-    }
-
-    @Test
-    public void shouldReadLines() throws IOException {
-        try (Document document = textDocument()) {
-            assertEquals(1, document.getLines().size());
-            assertEquals(ANY_TEXT, document.getLines().get(0));
-        }
-    }
-
-    @Test
-    public void shouldGetBytes() throws IOException {
-        try (Document document = textDocument()) {
-            assertEquals(11, document.getBytes().length);
-        }
-    }
-
-    @Test
-    public void shouldCloseDocument() {
-        final Document document = textDocument();
-        final TestClosable closable1 = document.addClosable(new TestClosable());
-        final TestClosable closable2 = document.addClosable(new TestClosable());
-
-        document.close();
-
-        assertTrue(closable1.isClosed());
-        assertTrue(closable2.isClosed());
-    }
-
-    private static int count(Iterator<String> iterator) {
-        int count = 0;
-        while (iterator.hasNext()) {
-            count++;
-            iterator.next();
-        }
-        return count;
-    }
-
-    private static Document textDocument() {
-        return DocumentFactory.create("stdin", ANY_TEXT);
-    }
-
-    private static final class TestClosable implements Closeable {
-
-        private boolean closed = false;
-
-        @Override
-        public void close() throws IOException {
-            closed = true;
-        }
-
-        public boolean isClosed() {
-            return closed;
-        }
-    }
-}
diff --git a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentsTest.java b/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentsTest.java
deleted file mode 100644
index 5c7f90a..0000000
--- a/freemarker-generator-base/src/test/java/org/apache/freemarker/generator/document/DocumentsTest.java
+++ /dev/null
@@ -1,117 +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 of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.freemarker.generator.document;
-
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentFactory;
-import org.apache.freemarker.generator.base.document.Documents;
-import org.junit.Test;
-
-import java.io.File;
-import java.net.MalformedURLException;
-import java.net.URL;
-
-import static java.nio.charset.StandardCharsets.UTF_8;
-import static java.util.Arrays.asList;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-
-public class DocumentsTest {
-
-    private static final String UNKNOWN = "unknown";
-    private static final String ANY_TEXT = "Hello World";
-    private static final String ANY_FILE_NAME = "pom.xml";
-    private static final String ANY_FILE_EXTENSION = "xml";
-    private static final File ANY_FILE = new File(ANY_FILE_NAME);
-    private static final String ANY_URL = "https://server.invalid?foo=bar";
-
-    @Test
-    public void shouldFindByWildcard() {
-        final Documents documents = documents();
-
-        assertEquals(0, documents.find(null).size());
-        assertEquals(0, documents.find("").size());
-        assertEquals(0, documents.find("*.bar").size());
-        assertEquals(0, documents.find("foo.*").size());
-        assertEquals(0, documents.find("foo.bar").size());
-
-        assertEquals(2, documents.find("*.*").size());
-        assertEquals(1, documents.find("*." + ANY_FILE_EXTENSION).size());
-        assertEquals(1, documents.find("*.???").size());
-        assertEquals(1, documents.find("*om*").size());
-        assertEquals(1, documents.find("*o*.xml").size());
-
-        assertEquals(1, documents.find(ANY_FILE_NAME).size());
-        assertEquals(1, documents.find(ANY_FILE_NAME.charAt(0) + "*").size());
-
-        assertEquals(3, documents.find("*").size());
-    }
-
-    @Test
-    public void shouldGetDocument() {
-        assertNotNull(documents().get(ANY_FILE_NAME));
-    }
-
-    @Test
-    public void shouldGetAllDocuments() {
-        final Documents documents = documents();
-
-        assertEquals("unknown", documents().get(0).getName());
-        assertEquals("pom.xml", documents().get(1).getName());
-        assertEquals("server.invalid", documents().get(2).getName());
-        assertEquals("unknown", documents().getFirst().getName());
-        assertEquals(3, documents.getList().size());
-        assertEquals(3, documents.size());
-        assertFalse(documents.isEmpty());
-    }
-
-    @Test
-    public void shouldGetNames() {
-        assertEquals(asList("unknown", "pom.xml", "server.invalid"), documents().getNames());
-    }
-
-    @Test(expected = IllegalArgumentException.class)
-    public void shouldThrowExceptionWhenGetDoesNotFindDocument() {
-        documents().get("file-does-not-exist");
-    }
-
-    @Test(expected = IllegalArgumentException.class)
-    public void shouldThrowExceptionWhenGetFindsMultipleDocuments() {
-        documents().get("*");
-    }
-
-    private static Documents documents() {
-        return new Documents(asList(textDocument(), fileDocument(), urlDocument()));
-    }
-
-    private static Document textDocument() {
-        return DocumentFactory.create(UNKNOWN, ANY_TEXT);
-    }
-
-    private static Document fileDocument() {
-        return DocumentFactory.create(ANY_FILE, UTF_8);
-    }
-
-    private static Document urlDocument() {
-        try {
-            return DocumentFactory.create(new URL(ANY_URL));
-        } catch (MalformedURLException e) {
-            throw new RuntimeException(e);
-        }
-    }
-}
diff --git a/freemarker-generator-cli/README.md b/freemarker-generator-cli/README.md
index 06b7680..754dd24 100644
--- a/freemarker-generator-cli/README.md
+++ b/freemarker-generator-cli/README.md
@@ -58,7 +58,7 @@ Some years later the not-so-small-any-longer-and-not-having-tests Groovy script
 * Support transformation of HTML using [JSoup](https://jsoup.org)
 * Support transformation of structured logfiles using [Grok](https://github.com/thekrakken/java-grok)
 * XML & XPath is supported by FreeMarker [out-of-the-box](http://freemarker.org/docs/xgui.html)
-* Support for reading document content from STDIN to integrate with command line tools
+* Support for reading a datasource content from STDIN to integrate with command line tools
 * Support execution of arbitrary commands using [Apache Commons Exec](https://commons.apache.org/proper/commons-exec/)
 * Add some commonly useful information such as `System Properties`, `Enviroment Variables`
 * Support embedding the code in existing applications
@@ -106,7 +106,7 @@ FreeMarker CLI Tools
 - XmlTool              : Process XML files using Apache FreeMarker (see https://freemarker.apache.org/docs/xgui.html)
 - YamlTool             : Process YAML files using SnakeYAML(see https://bitbucket.org/asomov/snakeyaml/wiki/Home)
 
-FreeMarker CLI Documents
+FreeMarker CLI Datasources
 ---------------------------------------------------------------------------
 
 User Supplied Parameters
@@ -190,7 +190,6 @@ Please note that generated PDF files are very likely not found since they requir
 
 ```text
 > ./bin/freemarker-cli  -h
-
 Usage: freemarker-cli (-t=<template> | -i=<interactiveTemplate>) [-EhV]
                       [--stdin] [-b=<baseDir>] [--config=<configFile>]
                       [-e=<inputEncoding>] [--exclude=<exclude>]
@@ -205,24 +204,25 @@ Apache FreeMarker CLI
   -D, --system-property=<String=String>
                             Set system property
   -e, --input-encoding=<inputEncoding>
-                            Encoding of input documents
+                            Encoding of datasource
   -E, --expose-env          Expose environment variables and user-supplied
                               properties globally
-      --exclude=<exclude>   File pattern for document input directory
+      --exclude=<exclude>   File pattern for datasource input directory
   -h, --help                Show this help message and exit.
   -i, --interactive=<interactiveTemplate>
                             Interactive FreeMarker template
-      --include=<include>   File pattern for document input directory
+      --include=<include>   File pattern for datasource input directory
   -l, --locale=<locale>     Locale being used for the output, e.g. 'en_US'
   -o, --output=<outputFile> Output file
       --output-encoding=<outputEncoding>
                             Encoding of output, e.g. UTF-8
   -P, --param=<String=String>
                             Set parameter
-      --stdin               Read input document from stdin
+      --stdin               Read datasource from stdin
   -t, --template=<template> FreeMarker template to render
       --times=<times>       Re-run X times for profiling
   -V, --version             Print version information and exit.
+
 ```
 
 # 6. Examples
@@ -255,7 +255,7 @@ or pipe a cURL response
 
 ```text
 <#ftl output_format="plainText" >
-<#assign json = JsonPathTool.parse(Documents.get(0))>
+<#assign json = JsonPathTool.parse(Datasources.get(0))>
 <#assign users = json.read("$[*]")>
 <#--------------------------------------------------------------------------->
 # GitHub Users
@@ -293,7 +293,7 @@ The FreeMarker template is shown below
 ```text
 <#ftl output_format="plainText">
 <#assign cvsFormat = CSVTool.formats["DEFAULT"].withHeader()>
-<#assign csvParser = CSVTool.parse(Documents.get(0), cvsFormat)>
+<#assign csvParser = CSVTool.parse(Datasources.get(0), cvsFormat)>
 <#assign csvHeaders = csvParser.getHeaderMap()?keys>
 <#assign csvRecords = csvParser.records>
 <#--------------------------------------------------------------------------->
@@ -330,7 +330,7 @@ using the following template
 
 ```text
 <#ftl output_format="plainText" >
-<#assign xml = XmlTool.parse(Documents.get(0))>
+<#assign xml = XmlTool.parse(Datasources.get(0))>
 <#list xml.recipients.person as recipient>
 To: ${recipient.name}
 ${recipient.address}
@@ -377,7 +377,7 @@ One day I was asked a to prepare a CSV files containing REST endpoints described
 
 ```text
 <#ftl output_format="plainText" strip_text="true">
-<#assign json = JsonPathTool.parse(Documents.get(0))>
+<#assign json = JsonPathTool.parse(Datasources.get(0))>
 <#assign basePath = json.read("$.basePath")>
 <#assign paths = json.read("$.paths")>
 
@@ -439,15 +439,15 @@ The provided FTL transforms an Excel into a HTML document supporting multiple Ex
 
 ```text
 <#ftl output_format="HTML" >
-<#assign document = Documents.get(0)>
-<#assign documentName = document.name>
-<#assign workbook = ExcelTool.parse(document)>
+<#assign datasource = Datasources.get(0)>
+<#assign name = datasource.name>
+<#assign workbook = ExcelTool.parse(datasource)>
 <#assign date = .now?iso_utc>
 <#--------------------------------------------------------------------------->
 <!DOCTYPE html>
 <html>
 <head>
-    <title>${documentName}</title>
+    <title>${name}</title>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
@@ -455,7 +455,7 @@ The provided FTL transforms an Excel into a HTML document supporting multiple Ex
 <body>
 <div class="container-fluid">
     <h1>Excel Test
-        <small>${documentName}, ${date}</small>
+        <small>${name}, ${date}</small>
     </h1>
     <@writeSheets workbook/>
 </div>
@@ -535,8 +535,8 @@ The FTL uses a couple of interesting features
 <#ftl output_format="plainText" strip_text="true">
 <#compress>
     TENANT,SITE,USER_ID,DISPOSER_ID,PASSWORD,SMS_OTP,NAME,DESCRIPTION
-    <#list Documents.list as document>
-        <#assign properties = PropertiesTool.parse(document)>
+    <#list Datasources.list as datasource>
+        <#assign properties = PropertiesTool.parse(datasource)>
         <#assign environments = properties["ENVIRONMENTS"]!"">
         <#assign tenant = extractTenant(environments)>
         <#assign site = extractSite(environments)>
@@ -565,10 +565,10 @@ For a POC (proof of concept) I created a sample transformation from CSV to XML-F
 
 ```text
 <#ftl output_format="XML" >
-<#assign document = Documents.get(0)>
-<#assign name = document.name>
+<#assign datasource = Datasources.get(0)>
+<#assign name = datasource.name>
 <#assign cvsFormat = CSVTool.formats.DEFAULT.withDelimiter('\t').withHeader()>
-<#assign csvParser = CSVTool.parse(document, cvsFormat)>
+<#assign csvParser = CSVTool.parse(datasource, cvsFormat)>
 <#assign csvHeaders = csvParser.getHeaderMap()?keys>
 <#assign csvRecords = csvParser.records>
 <#--------------------------------------------------------------------------->
@@ -686,9 +686,8 @@ Recently I got the rather unusual question how to determine the list of dependen
 
 ```text
 <#ftl output_format="plainText" strip_text="true">
-<#assign document = Documents.get(0)>
-<#assign documentName = document.name>
-<#assign html = JsoupTool.parse(document)>
+<#assign datasource = Datasources.get(0)>
+<#assign html = JsoupTool.parse(datasource)>
 
 <#compress>
     <@writeHeader/>
@@ -762,7 +761,7 @@ and the final FTL is found below
 ```text
 <#ftl output_format="plainText">
 <#assign cvsFormat = CSVTool.formats["DEFAULT"].withHeader()>
-<#assign csvParser = CSVTool.parse(Documents.get(0), cvsFormat)>
+<#assign csvParser = CSVTool.parse(Datasources.get(0), cvsFormat)>
 <#assign records = csvParser.records>
 <#assign csvMap = CSVTool.toMap(records, "disposer")>
 <#--------------------------------------------------------------------------->
@@ -846,8 +845,8 @@ using the following FreeMarker template
 ```text
 <#ftl output_format="plainText" strip_whitespace=true>
 <#assign grok = GrokTool.compile("%{COMBINEDAPACHELOG}")>
-<#assign document = Documents.get(0)>
-<#assign lines = document.getLineIterator()>
+<#assign datasource = Datasources.get(0)>
+<#assign lines = datasource.getLineIterator()>
 
 <#compress>
     TIMESTAMP;VERB;REQUEST;HTTPVERSION
@@ -865,7 +864,7 @@ using the following FreeMarker template
 While this looks small and tidy there are some nifty features
 
 * `GrokTool.compile("%{COMBINEDAPACHELOG}")` builds the `Grok` instance to parse access logs in `Combined Format`
-* The source document is streamed line by line and not loaded into memory in one piece
+* The datasource is streamed line by line and not loaded into memory in one piece
 * This also works for using `stdin` so are able to parse GB of access log or other files
 
 ## 6.11 CSV Transformation
@@ -878,7 +877,7 @@ renders the following template
 
 ```text
 <#ftl output_format="plainText" strip_text="true">
-<#assign csvParser = createCsvParser(Documents.get(0))>
+<#assign csvParser = createCsvParser(Datasources.get(0))>
 <#assign csvPrinter = createCsvPrinter()>
 <#-- Print each line without materializing the CSV in memory -->
 <#compress>
@@ -887,11 +886,11 @@ renders the following template
     </#list>
 </#compress>
 
-<#function createCsvParser document>
+<#function createCsvParser datasource>
     <#assign initialCvsInFormat = CSVTool.formats[SystemTool.getParameter("csv.in.format", "DEFAULT")]>
     <#assign csvInDelimiter = CSVTool.toDelimiter(SystemTool.getParameter("csv.in.delimiter", initialCvsInFormat.getDelimiter()))>
     <#assign cvsInFormat = initialCvsInFormat.withDelimiter(csvInDelimiter)>
-    <#return CSVTool.parse(document, cvsInFormat)>
+    <#return CSVTool.parse(datasource, cvsInFormat)>
 </#function>
 
 <#function createCsvPrinter>
@@ -981,13 +980,13 @@ Sometime you need to apply a CSS, JSON or XPath query in ad ad-hoc way without i
 > bin/freemarker-cli -i 'Hello ${SystemTool.envs["USER"]}'; echo
 Hello sgoeschl
 
-> bin/freemarker-cli -i '${JsonPathTool.parse(Documents.first).read("$.info.title")}' site/sample/json/swagger-spec.json; echo
+> bin/freemarker-cli -i '${JsonPathTool.parse(Datasources.first).read("$.info.title")}' site/sample/json/swagger-spec.json; echo
 Swagger Petstore
 
-> bin/freemarker-cli -i '${XmlTool.parse(Documents.first)["recipients/person[1]/name"]}' site/sample/xml/recipients.xml; echo
+> bin/freemarker-cli -i '${XmlTool.parse(Datasources.first)["recipients/person[1]/name"]}' site/sample/xml/recipients.xml; echo
 John Smith
 
-> bin/freemarker-cli -i '${JsoupTool.parse(Documents.first).select("a")[0]}' site/sample/html/dependencies.html; echo
+> bin/freemarker-cli -i '${JsoupTool.parse(Datasources.first).select("a")[0]}' site/sample/html/dependencies.html; echo
 <a href="${project.url}" title="FreeMarker CLI">FreeMarker CLI</a>
 
 > ./bin/freemarker-cli -i '<#list SystemTool.envs as name,value>${name} ==> ${value}${"\n"}</#list>'
@@ -1016,8 +1015,8 @@ and Apache FreeMarker template
 
 ```text
 <#ftl output_format="plainText" strip_text="true">
-<#assign document = Documents.get(0)>
-<#assign parser = parser(document)>
+<#assign datasource = Datasources.get(0)>
+<#assign parser = parser(datasource)>
 <#assign headers = parser.getHeaderNames()>
 <#assign column = SystemTool.getProperty("column")>
 <#assign values = SystemTool.getProperty("values")?split(",")>
@@ -1025,7 +1024,7 @@ and Apache FreeMarker template
 <#-- Process each line without materializing the whole file in memory -->
 
 <#compress>
-    <@writePageHeader document/>
+    <@writePageHeader datasource/>
     <#list parser.iterator() as record>
         <#if filter(record)>
             <@writeCsvRecord headers record/>
@@ -1033,18 +1032,18 @@ and Apache FreeMarker template
     </#list>
 </#compress>
 
-<#function parser document>
+<#function parser datasource>
     <#assign format = CSVTool.formats[SystemTool.getProperty("format", "DEFAULT")]>
     <#assign delimiter = CSVTool.toDelimiter(SystemTool.getProperty("delimiter", format.getDelimiter()))>
-    <#return CSVTool.parse(document, format.withFirstRecordAsHeader().withDelimiter(delimiter))>
+    <#return CSVTool.parse(datasource, format.withFirstRecordAsHeader().withDelimiter(delimiter))>
 </#function>
 
 <#function filter record>
     <#return values?seq_contains(record.get(column))>
 </#function>
 
-<#macro writePageHeader document>
-    # ${document.name}
+<#macro writePageHeader datasource>
+    # ${datasource.name}
 </#macro>
 
 <#macro writeCsvRecord headers record>
@@ -1189,13 +1188,13 @@ user.home    : /Users/sgoeschl
 - java.vendor.url ==> http://java.oracle.com/
 - java.vm.name ==> Java HotSpot(TM) 64-Bit Server VM
 
-11) Access Documents
+11) Access Datasources
 ---------------------------------------------------------------------------
-Get the number of documents:
+Get the number of datasources:
 - 0
 List all files containing "README" in the name
 List all files having "md" extension
-Get all documents
+Get all datasources
 
 12) FreeMarker CLI Tools
 ---------------------------------------------------------------------------
@@ -1215,7 +1214,7 @@ Get all documents
 13) Document Data Model
 ---------------------------------------------------------------------------
 - CSVTool
-- Documents
+- Datasources
 - ExcelTool
 - ExecTool
 - FreeMarkerTool
@@ -1255,19 +1254,19 @@ Sat Feb 22 16:54:20 CET 2020
 ## 7.1 How It Works
 
 * The user-supplied files are loaded or input is read from `stdin`
-* The FreeMarker data model containing the documents and tools is created and passed to the template
+* The FreeMarker data model containing the datasources and tools is created and passed to the template
 * The generated output is written to the user-supplied file or to `stdout`
 
 ## 7.2 FreeMarker Data Model
 
-Within the script a FreeMarker data model is set up and passed to the template - it contains the documents to be processed and the following tools
+Within the script a FreeMarker data model is set up and passed to the template - it contains the datasources to be processed and the following tools
 
 | Entry                 | Description                                                                                               |
 |-----------------------|-----------------------------------------------------------------------------------------------------------|
 | CSVTool               | Process CSV files using [Apache Commons CSV](https://commons.apache.org/proper/commons-csv/)              |
 | ExecTool              | Execute command line tools using [Apache Commons Exec](https://commons.apache.org/proper/commons-exec/)   |
 | ExcelTool             | Process Excels files (XLS, XLSX) using [Apache POI](https://poi.apache.org)                               |
-| Documents             | Helper class to find documents, e.g. by name, extension or index                                          |
+| Datasources           | Helper class to find datasources, e.g. by name, extension or index                                          |
 | FreeMarkerTool        | Expose useful FreeMarker classes                                                                          |
 | GrokTool              | Process text files using [Grok](https://github.com/thekrakken/java-grok) instead of regular expressions   |
 | JsonPathTool          | Process JSON file using [Java JSON Path](https://github.com/json-path/JsonPath)                           |
diff --git a/freemarker-generator-cli/run-samples.sh b/freemarker-generator-cli/run-samples.sh
index 4e0e867..1bc86d2 100755
--- a/freemarker-generator-cli/run-samples.sh
+++ b/freemarker-generator-cli/run-samples.sh
@@ -46,9 +46,9 @@ $FREEMARKER_CMD -t templates/demo.ftl README.md > target/out/demo.txt || { echo
 # Interactive Mode
 #############################################################################
 
-$FREEMARKER_CMD -i '${JsonPathTool.parse(Documents.first).read("$.info.title")}' site/sample/json/swagger-spec.json > target/out/interactive-json.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
-$FREEMARKER_CMD -i '${XmlTool.parse(Documents.first)["recipients/person[1]/name"]}' site/sample/xml/recipients.xml > target/out/interactive-xml.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
-$FREEMARKER_CMD -i '${JsoupTool.parse(Documents.first).select("a")[0]}' site/sample/html/dependencies.html > target/out/interactive-html.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
+$FREEMARKER_CMD -i '${JsonPathTool.parse(Datasources.first).read("$.info.title")}' site/sample/json/swagger-spec.json > target/out/interactive-json.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
+$FREEMARKER_CMD -i '${XmlTool.parse(Datasources.first)["recipients/person[1]/name"]}' site/sample/xml/recipients.xml > target/out/interactive-xml.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
+$FREEMARKER_CMD -i '${JsoupTool.parse(Datasources.first).select("a")[0]}' site/sample/html/dependencies.html > target/out/interactive-html.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
 
 #############################################################################
 # CSV
diff --git a/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/Main.java b/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/Main.java
index 5b7ac9b..82dbc6f 100644
--- a/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/Main.java
+++ b/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/Main.java
@@ -67,7 +67,7 @@ public class Main implements Callable<Integer> {
     @Option(names = { "-D", "--system-property" }, description = "Set system property")
     private Properties systemProperties;
 
-    @Option(names = { "-e", "--input-encoding" }, description = "Encoding of input documents", defaultValue = "UTF-8")
+    @Option(names = { "-e", "--input-encoding" }, description = "Encoding of datasource", defaultValue = "UTF-8")
     private String inputEncoding;
 
     @Option(names = { "-E", "--expose-env" }, description = "Expose environment variables and user-supplied properties globally")
@@ -85,16 +85,16 @@ public class Main implements Callable<Integer> {
     @Option(names = { "--config" }, defaultValue = FREEMARKER_CLI_PROPERTY_FILE, description = "FreeMarker CLI configuration file")
     private String configFile;
 
-    @Option(names = { "--include" }, description = "File pattern for document input directory")
+    @Option(names = { "--include" }, description = "File pattern for datasource input directory")
     private String include;
 
-    @Option(names = { "--exclude" }, description = "File pattern for document input directory")
+    @Option(names = { "--exclude" }, description = "File pattern for datasource input directory")
     private String exclude;
 
     @Option(names = { "--output-encoding" }, description = "Encoding of output, e.g. UTF-8", defaultValue = "UTF-8")
     private String outputEncoding;
 
-    @Option(names = { "--stdin" }, description = "Read input document from stdin")
+    @Option(names = { "--stdin" }, description = "Read datasource from stdin")
     private boolean readFromStdin;
 
     @Option(names = { "--times" }, defaultValue = "1", description = "Re-run X times for profiling")
diff --git a/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/config/Suppliers.java b/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/config/Suppliers.java
index 084be3d..7d2f5f1 100644
--- a/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/config/Suppliers.java
+++ b/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/config/Suppliers.java
@@ -1,7 +1,7 @@
 package org.apache.freemarker.generator.cli.config;
 
 import freemarker.cache.TemplateLoader;
-import org.apache.freemarker.generator.base.document.DocumentsSupplier;
+import org.apache.freemarker.generator.base.datasource.DatasourcesSupplier;
 import org.apache.freemarker.generator.base.file.PropertiesClassPathSupplier;
 import org.apache.freemarker.generator.base.file.PropertiesFileSystemSupplier;
 import org.apache.freemarker.generator.base.file.PropertiesSupplier;
@@ -33,8 +33,8 @@ public class Suppliers {
         return new ToolsSupplier(settings.getConfiguration(), settings.toMap());
     }
 
-    public static DocumentsSupplier documentsSupplier(Settings settings) {
-        return new DocumentsSupplier(settings.getSources(),
+    public static DatasourcesSupplier datasourcesSupplier(Settings settings) {
+        return new DatasourcesSupplier(settings.getSources(),
                 settings.getInclude(),
                 settings.getExclude(),
                 settings.getInputEncoding());
diff --git a/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/task/FreeMarkerTask.java b/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/task/FreeMarkerTask.java
index c09faae..f537309 100644
--- a/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/task/FreeMarkerTask.java
+++ b/freemarker-generator-cli/src/main/java/org/apache/freemarker/generator/cli/task/FreeMarkerTask.java
@@ -20,9 +20,9 @@ import freemarker.template.Configuration;
 import freemarker.template.Template;
 import org.apache.commons.io.FileUtils;
 import org.apache.freemarker.generator.base.FreeMarkerConstants.Location;
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentFactory;
-import org.apache.freemarker.generator.base.document.Documents;
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourceFactory;
+import org.apache.freemarker.generator.base.datasource.Datasources;
 import org.apache.freemarker.generator.cli.config.Settings;
 
 import java.io.File;
@@ -38,9 +38,9 @@ import java.util.function.Supplier;
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static java.util.Objects.requireNonNull;
 import static org.apache.freemarker.generator.base.FreeMarkerConstants.Location.STDIN;
-import static org.apache.freemarker.generator.base.FreeMarkerConstants.Model.DOCUMENTS;
+import static org.apache.freemarker.generator.base.FreeMarkerConstants.Model.DATASOURCES;
 import static org.apache.freemarker.generator.cli.config.Suppliers.configurationSupplier;
-import static org.apache.freemarker.generator.cli.config.Suppliers.documentsSupplier;
+import static org.apache.freemarker.generator.cli.config.Suppliers.datasourcesSupplier;
 import static org.apache.freemarker.generator.cli.config.Suppliers.toolsSupplier;
 
 /**
@@ -52,28 +52,28 @@ public class FreeMarkerTask implements Callable<Integer> {
 
     private final Settings settings;
     private final Supplier<Map<String, Object>> toolsSupplier;
-    private final Supplier<List<Document>> documentsSupplier;
+    private final Supplier<List<Datasource>> datasourcesSupplier;
     private final Supplier<Configuration> configurationSupplier;
 
     public FreeMarkerTask(Settings settings) {
-        this(settings, toolsSupplier(settings), documentsSupplier(settings), configurationSupplier(settings));
+        this(settings, toolsSupplier(settings), datasourcesSupplier(settings), configurationSupplier(settings));
     }
 
     public FreeMarkerTask(Settings settings,
                           Supplier<Map<String, Object>> toolsSupplier,
-                          Supplier<List<Document>> documentsSupplier,
+                          Supplier<List<Datasource>> datasourcesSupplier,
                           Supplier<Configuration> configurationSupplier) {
         this.settings = requireNonNull(settings);
         this.toolsSupplier = requireNonNull(toolsSupplier);
-        this.documentsSupplier = requireNonNull(documentsSupplier);
+        this.datasourcesSupplier = requireNonNull(datasourcesSupplier);
         this.configurationSupplier = requireNonNull(configurationSupplier);
     }
 
     @Override
     public Integer call() {
         final Template template = template(settings, configurationSupplier);
-        try (Writer writer = settings.getWriter(); Documents documents = documents(settings, documentsSupplier)) {
-            final Map<String, Object> dataModel = dataModel(settings, documents, toolsSupplier);
+        try (Writer writer = settings.getWriter(); Datasources datasources = datasources(settings, datasourcesSupplier)) {
+            final Map<String, Object> dataModel = dataModel(settings, datasources, toolsSupplier);
             template.process(dataModel, writer);
             return SUCCESS;
         } catch (RuntimeException e) {
@@ -83,16 +83,16 @@ public class FreeMarkerTask implements Callable<Integer> {
         }
     }
 
-    private static Documents documents(Settings settings, Supplier<List<Document>> documentsSupplier) {
-        final List<Document> documents = new ArrayList<>(documentsSupplier.get());
+    private static Datasources datasources(Settings settings, Supplier<List<Datasource>> datasourcesSupplier) {
+        final List<Datasource> datasources = new ArrayList<>(datasourcesSupplier.get());
 
-        // Add optional document from STDIN at the start of the list since
+        // Add optional datasource from STDIN at the start of the list since
         // this allows easy sequence slicing in FreeMarker.
         if (settings.isReadFromStdin()) {
-            documents.add(0, DocumentFactory.create(STDIN, System.in, STDIN, UTF_8));
+            datasources.add(0, DatasourceFactory.create(STDIN, System.in, STDIN, UTF_8));
         }
 
-        return new Documents(documents);
+        return new Datasources(datasources);
     }
 
     /**
@@ -122,10 +122,10 @@ public class FreeMarkerTask implements Callable<Integer> {
         }
     }
 
-    private static Map<String, Object> dataModel(Settings settings, Documents documents, Supplier<Map<String, Object>> tools) {
+    private static Map<String, Object> dataModel(Settings settings, Datasources datasources, Supplier<Map<String, Object>> tools) {
         final Map<String, Object> dataModel = new HashMap<>();
 
-        dataModel.put(DOCUMENTS, documents);
+        dataModel.put(DATASOURCES, datasources);
 
         if (settings.isEnvironmentExposed()) {
             // add all system & user-supplied properties as top-level entries
diff --git a/freemarker-generator-cli/src/main/scripts/run-samples.sh b/freemarker-generator-cli/src/main/scripts/run-samples.sh
index cf192cc..a751cc5 100755
--- a/freemarker-generator-cli/src/main/scripts/run-samples.sh
+++ b/freemarker-generator-cli/src/main/scripts/run-samples.sh
@@ -46,9 +46,9 @@ $FREEMARKER_CMD -t templates/demo.ftl README.md > target/out/demo.txt || { echo
 # Interactive Mode
 #############################################################################
 
-$FREEMARKER_CMD -i '${JsonPathTool.parse(Documents.first).read("$.info.title")}' site/sample/json/swagger-spec.json > target/out/interactive-json.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
-$FREEMARKER_CMD -i '${XmlTool.parse(Documents.first)["recipients/person[1]/name"]}' site/sample/xml/recipients.xml > target/out/interactive-xml.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
-$FREEMARKER_CMD -i '${JsoupTool.parse(Documents.first).select("a")[0]}' site/sample/html/dependencies.html > target/out/interactive-html.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
+$FREEMARKER_CMD -i '${JsonPathTool.parse(Datasources.first).read("$.info.title")}' site/sample/json/swagger-spec.json > target/out/interactive-json.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
+$FREEMARKER_CMD -i '${XmlTool.parse(Datasources.first)["recipients/person[1]/name"]}' site/sample/xml/recipients.xml > target/out/interactive-xml.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
+$FREEMARKER_CMD -i '${JsoupTool.parse(Datasources.first).select("a")[0]}' site/sample/html/dependencies.html > target/out/interactive-html.txt || { echo >&2 "Test failed.  Aborting."; exit 1; }
 
 #############################################################################
 # CSV
diff --git a/freemarker-generator-cli/src/test/java/org/apache/freemarker/generator/cli/ExamplesTest.java b/freemarker-generator-cli/src/test/java/org/apache/freemarker/generator/cli/ExamplesTest.java
index 6e152dd..e5fa6ac 100644
--- a/freemarker-generator-cli/src/test/java/org/apache/freemarker/generator/cli/ExamplesTest.java
+++ b/freemarker-generator-cli/src/test/java/org/apache/freemarker/generator/cli/ExamplesTest.java
@@ -102,9 +102,9 @@ public class ExamplesTest extends AbstractMainTest {
 
     @Test
     public void shouldRunInteractiveTemplateExamples() throws IOException {
-        assertValid(execute("-i ${JsonPathTool.parse(Documents.first).read(\"$.info.title\")} site/sample/json/swagger-spec.json"));
-        assertValid(execute("-i ${XmlTool.parse(Documents.first)[\"recipients/person[1]/name\"]} site/sample/xml/recipients.xml"));
-        assertValid(execute("-i ${JsoupTool.parse(Documents.first).select(\"a\")[0]} site/sample/html/dependencies.html"));
+        assertValid(execute("-i ${JsonPathTool.parse(Datasources.first).read(\"$.info.title\")} site/sample/json/swagger-spec.json"));
+        assertValid(execute("-i ${XmlTool.parse(Datasources.first)[\"recipients/person[1]/name\"]} site/sample/xml/recipients.xml"));
+        assertValid(execute("-i ${JsoupTool.parse(Datasources.first).select(\"a\")[0]} site/sample/html/dependencies.html"));
     }
 
     @Test
diff --git a/freemarker-generator-cli/src/test/java/org/apache/freemarker/generator/cli/ManualTest.java b/freemarker-generator-cli/src/test/java/org/apache/freemarker/generator/cli/ManualTest.java
index 81f47eb..35b1069 100644
--- a/freemarker-generator-cli/src/test/java/org/apache/freemarker/generator/cli/ManualTest.java
+++ b/freemarker-generator-cli/src/test/java/org/apache/freemarker/generator/cli/ManualTest.java
@@ -30,9 +30,9 @@ public class ManualTest {
     // private static final String CMD = "-b ./src/test -DFOO=foo -PBAR=bar -t templates/demo.ftl site/sample/csv/transactions.csv";
     // private static final String CMD = "-b ./src/test -Dcsv.out.format=TDF -t templates/csv/transform.ftl site/sample/csv/contract.csv";
     // private static final String CMD = "-t templates/excel/csv/transform.ftl -l de_AT site/sample/excel/test.xlsx";
-    // private static final String CMD = "-i ${JsonPathTool.parse(Documents.first).read('$.info.title')} site/sample/json/swagger-spec.json";
-    // private static final String CMD = "-i ${XmlTool.parse(Documents.first)['recipients/person[1]/name']} site/sample/xml/recipients.xml";
-    // private static final String CMD = "-i ${JsoupTool.parse(Documents.first).select('a')[0]} site/sample/html/dependencies.html";
+    // private static final String CMD = "-i ${JsonPathTool.parse(Datasources.first).read('$.info.title')} site/sample/json/swagger-spec.json";
+    // private static final String CMD = "-i ${XmlTool.parse(Datasources.first)['recipients/person[1]/name']} site/sample/xml/recipients.xml";
+    // private static final String CMD = "-i ${JsoupTool.parse(Datasources.first).select('a')[0]} site/sample/html/dependencies.html";
     // private static final String CMD = "-b ./src/test -t templates/properties/csv/locker-test-users.ftl site/sample/properties";
     // private static final String CMD = "-b ./src/test -e UTF-8 -l de_AT -Dcolumn=Order%20ID -Dvalues=226939189,957081544 -Dformat=DEFAULT -Ddelimiter=COMMA -t templates/csv/md/filter.ftl site/sample/csv/sales-records.csv";
     private static final String CMD = "-E -b ./src/test -t templates/environment.ftl";
diff --git a/freemarker-generator-cli/src/test/templates/echo.ftl b/freemarker-generator-cli/src/test/templates/echo.ftl
index 3499bb0..bbd148f 100644
--- a/freemarker-generator-cli/src/test/templates/echo.ftl
+++ b/freemarker-generator-cli/src/test/templates/echo.ftl
@@ -15,8 +15,8 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#list Documents.list as document>
-${document.name}, ${document.location}
+<#list Datasources.list as datasource>
+${datasource.name}, ${datasource.location}
 =============================================================================
-${document.text}
+${datasource.text}
 </#list>
\ No newline at end of file
diff --git a/freemarker-generator-cli/src/test/templates/tools/csv.ftl b/freemarker-generator-cli/src/test/templates/tools/csv.ftl
index 93b53f8..d069b57 100644
--- a/freemarker-generator-cli/src/test/templates/tools/csv.ftl
+++ b/freemarker-generator-cli/src/test/templates/tools/csv.ftl
@@ -15,7 +15,7 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign records = CSVTool.parse(Documents.get(0), CSVFormat.DEFAULT.withHeader()).records>
+<#assign records = CSVTool.parse(Datasources.get(0), CSVFormat.DEFAULT.withHeader()).records>
 
 CSVTool.toMap(name)
 =============================================================================
diff --git a/freemarker-generator-cli/templates/accesslog/combined-access.ftl b/freemarker-generator-cli/templates/accesslog/combined-access.ftl
index fbcb71e..817ec59 100644
--- a/freemarker-generator-cli/templates/accesslog/combined-access.ftl
+++ b/freemarker-generator-cli/templates/accesslog/combined-access.ftl
@@ -16,8 +16,8 @@
   under the License.
 -->
 <#assign grok = GrokTool.compile("%{COMBINEDAPACHELOG}")>
-<#assign document = Documents.get(0)>
-<#assign lines = document.getLineIterator()>
+<#assign datasource = Datasources.get(0)>
+<#assign lines = datasource.getLineIterator()>
 
 <#compress>
     TIMESTAMP;VERB;REQUEST;HTTPVERSION
diff --git a/freemarker-generator-cli/templates/cat.ftl b/freemarker-generator-cli/templates/cat.ftl
index 77fd4c2..820e4ff 100644
--- a/freemarker-generator-cli/templates/cat.ftl
+++ b/freemarker-generator-cli/templates/cat.ftl
@@ -15,7 +15,7 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign lines = Documents.get(0).getLineIterator()>
+<#assign lines = Datasources.get(0).getLineIterator()>
 <#compress>
     <#list lines as line>
         ${line}
diff --git a/freemarker-generator-cli/templates/csv/csv/gatling-user-credentials.ftl b/freemarker-generator-cli/templates/csv/csv/gatling-user-credentials.ftl
index 3cfe9e8..19bb9b9 100644
--- a/freemarker-generator-cli/templates/csv/csv/gatling-user-credentials.ftl
+++ b/freemarker-generator-cli/templates/csv/csv/gatling-user-credentials.ftl
@@ -15,9 +15,9 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign document = Documents.get(0)>
+<#assign datasource = Datasources.get(0)>
 <#assign cvsFormat = CSVTool.formats["DEFAULT"].withDelimiter(';')>
-<#assign csvParser = CSVTool.parse(document, cvsFormat)>
+<#assign csvParser = CSVTool.parse(datasource, cvsFormat)>
 <#assign csvRecords = csvParser.records>
 
 <#compress>
diff --git a/freemarker-generator-cli/templates/csv/fo/transactions.ftl b/freemarker-generator-cli/templates/csv/fo/transactions.ftl
index 4715484..ff9c009 100644
--- a/freemarker-generator-cli/templates/csv/fo/transactions.ftl
+++ b/freemarker-generator-cli/templates/csv/fo/transactions.ftl
@@ -15,10 +15,10 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign document = Documents.get(0)>
-<#assign name = document.name>
+<#assign datasource = Datasources.get(0)>
+<#assign name = datasource.name>
 <#assign cvsFormat = CSVTool.formats.DEFAULT.withDelimiter('\t').withHeader()>
-<#assign csvParser = CSVTool.parse(document, cvsFormat)>
+<#assign csvParser = CSVTool.parse(datasource, cvsFormat)>
 <#assign csvHeaders = csvParser.getHeaderMap()?keys>
 <#assign csvRecords = csvParser.records>
 <#--------------------------------------------------------------------------->
diff --git a/freemarker-generator-cli/templates/csv/fo/transform.ftl b/freemarker-generator-cli/templates/csv/fo/transform.ftl
index 38594cd..d20f625 100644
--- a/freemarker-generator-cli/templates/csv/fo/transform.ftl
+++ b/freemarker-generator-cli/templates/csv/fo/transform.ftl
@@ -17,7 +17,7 @@
 -->
 <#assign csvFormatName = SystemTool.parameters["csv.format"]!"DEFAULT">
 <#assign cvsFormat = CSVTool.formats[csvFormatName].withHeader()>
-<#assign csvParser = CSVTool.parse(Documents.get(0), cvsFormat)>
+<#assign csvParser = CSVTool.parse(Datasources.get(0), cvsFormat)>
 <#assign csvHeaders = csvParser.getHeaderMap()?keys>
 <#assign csvRecords = csvParser.records>
 <#--------------------------------------------------------------------------->
diff --git a/freemarker-generator-cli/templates/csv/html/transactions.ftl b/freemarker-generator-cli/templates/csv/html/transactions.ftl
index b31d6c0..9fae075 100644
--- a/freemarker-generator-cli/templates/csv/html/transactions.ftl
+++ b/freemarker-generator-cli/templates/csv/html/transactions.ftl
@@ -15,10 +15,10 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign document = Documents.get(0)>
-<#assign name = document.name>
+<#assign datasource = Datasources.get(0)>
+<#assign name = datasource.name>
 <#assign cvsFormat = CSVTool.formats["DEFAULT"].withDelimiter('\t').withHeader()>
-<#assign csvParser = CSVTool.parse(document, cvsFormat)>
+<#assign csvParser = CSVTool.parse(datasource, cvsFormat)>
 <#assign csvHeaders = csvParser.getHeaderMap()?keys>
 <#assign csvRecords = csvParser.records>
 <#--------------------------------------------------------------------------->
diff --git a/freemarker-generator-cli/templates/csv/html/transform.ftl b/freemarker-generator-cli/templates/csv/html/transform.ftl
index 54a805e..5985857 100644
--- a/freemarker-generator-cli/templates/csv/html/transform.ftl
+++ b/freemarker-generator-cli/templates/csv/html/transform.ftl
@@ -15,10 +15,10 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign document = Documents.get(0)>
-<#assign name = document.name>
+<#assign datasource = Datasources.get(0)>
+<#assign name = datasource.name>
 <#assign cvsFormat = CSVTool.formats["DEFAULT"].withHeader()>
-<#assign csvParser = CSVTool.parse(document, cvsFormat)>
+<#assign csvParser = CSVTool.parse(datasource, cvsFormat)>
 <#assign csvHeaders = csvParser.getHeaderNames()>
 <#--------------------------------------------------------------------------->
 <!DOCTYPE html>
diff --git a/freemarker-generator-cli/templates/csv/md/filter.ftl b/freemarker-generator-cli/templates/csv/md/filter.ftl
index 3967e0c..92a0304 100644
--- a/freemarker-generator-cli/templates/csv/md/filter.ftl
+++ b/freemarker-generator-cli/templates/csv/md/filter.ftl
@@ -15,14 +15,14 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign document = Documents.get(0)>
-<#assign parser = parser(document)>
+<#assign datasource = Datasources.get(0)>
+<#assign parser = parser(datasource)>
 <#assign headers = parser.getHeaderNames()>
 <#assign column = SystemTool.getParameter("column")>
 <#assign values = SystemTool.getParameter("values")?split(",")>
 
 <#compress>
-    <@writePageHeader document/>
+    <@writePageHeader datasource/>
     <#-- Process each line without materializing the whole file in memory -->
     <#list parser.iterator() as record>
         <#if filter(record)>
@@ -31,18 +31,18 @@
     </#list>
 </#compress>
 
-<#function parser document>
+<#function parser datasource>
     <#assign format = CSVTool.formats[SystemTool.getParameter("format", "DEFAULT")]>
     <#assign delimiter = CSVTool.toDelimiter(SystemTool.getParameter("delimiter", format.getDelimiter()))>
-    <#return CSVTool.parse(document, format.withFirstRecordAsHeader().withDelimiter(delimiter))>
+    <#return CSVTool.parse(datasource, format.withFirstRecordAsHeader().withDelimiter(delimiter))>
 </#function>
 
 <#function filter record>
     <#return values?seq_contains(record.get(column))>
 </#function>
 
-<#macro writePageHeader document>
-    # ${document.name}
+<#macro writePageHeader datasource>
+    # ${datasource.name}
 </#macro>
 
 <#macro writeCsvRecord headers record>
diff --git a/freemarker-generator-cli/templates/csv/md/transform.ftl b/freemarker-generator-cli/templates/csv/md/transform.ftl
index efcf276..994e3f3 100644
--- a/freemarker-generator-cli/templates/csv/md/transform.ftl
+++ b/freemarker-generator-cli/templates/csv/md/transform.ftl
@@ -16,7 +16,7 @@
   under the License.
 -->
 <#assign cvsFormat = CSVTool.formats["DEFAULT"].withHeader()>
-<#assign csvParser = CSVTool.parse(Documents.get(0), cvsFormat)>
+<#assign csvParser = CSVTool.parse(Datasources.get(0), cvsFormat)>
 <#assign csvHeaders = csvParser.getHeaderMap()?keys>
 <#assign csvRecords = csvParser.records>
 <#--------------------------------------------------------------------------->
diff --git a/freemarker-generator-cli/templates/csv/shell/curl.ftl b/freemarker-generator-cli/templates/csv/shell/curl.ftl
index 8df601f..d7c75c9 100644
--- a/freemarker-generator-cli/templates/csv/shell/curl.ftl
+++ b/freemarker-generator-cli/templates/csv/shell/curl.ftl
@@ -16,7 +16,7 @@
   under the License.
 -->
 <#assign cvsFormat = CSVTool.formats["DEFAULT"].withHeader()>
-<#assign csvParser = CSVTool.parse(Documents.get(0), cvsFormat)>
+<#assign csvParser = CSVTool.parse(Datasources.get(0), cvsFormat)>
 <#assign records = csvParser.records>
 <#assign csvMap = CSVTool.toMap(records, "disposer")>
 <#--------------------------------------------------------------------------->
diff --git a/freemarker-generator-cli/templates/csv/transform.ftl b/freemarker-generator-cli/templates/csv/transform.ftl
index 0380abb..e13c9b5 100644
--- a/freemarker-generator-cli/templates/csv/transform.ftl
+++ b/freemarker-generator-cli/templates/csv/transform.ftl
@@ -15,7 +15,7 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign csvParser = createCsvParser(Documents.get(0))>
+<#assign csvParser = createCsvParser(Datasources.get(0))>
 <#assign csvPrinter = createCsvPrinter()>
 <#-- Print each line without materializing the CSV in memory -->
 <#compress>
@@ -24,11 +24,11 @@
     </#list>
 </#compress>
 
-<#function createCsvParser document>
+<#function createCsvParser datasource>
     <#assign initialCvsInFormat = CSVTool.formats[SystemTool.getParameter("csv.in.format", "DEFAULT")]>
     <#assign csvInDelimiter = CSVTool.toDelimiter(SystemTool.getParameter("csv.in.delimiter", initialCvsInFormat.getDelimiter()))>
     <#assign cvsInFormat = initialCvsInFormat.withDelimiter(csvInDelimiter)>
-    <#return CSVTool.parse(document, cvsInFormat)>
+    <#return CSVTool.parse(datasource, cvsInFormat)>
 </#function>
 
 <#function createCsvPrinter>
diff --git a/freemarker-generator-cli/templates/demo.ftl b/freemarker-generator-cli/templates/demo.ftl
index b3cad69..f981a9e 100644
--- a/freemarker-generator-cli/templates/demo.ftl
+++ b/freemarker-generator-cli/templates/demo.ftl
@@ -45,11 +45,11 @@ java.math.RoundingMode#UP: ${FreeMarkerTool.enums["java.math.RoundingMode"].UP}
 - java.math.RoundingMode.${roundingMode}<#lt>
 </#list>
 
-6) Display list of input files
+6) Display list of datasources
 ---------------------------------------------------------------------------
-List all files:
-<#list Documents.list as document>
-- Document: name=${document.name} location=${document.location} length=${document.length} encoding=${document.encoding!""}
+List all datasources:
+<#list Datasources.list as datasource>
+- Document: name=${datasource.name} location=${datasource.location} length=${datasource.length} encoding=${datasource.encoding!""}
 </#list>
 
 7) SystemTool
@@ -83,25 +83,25 @@ user.home    : ${SystemTool.systemProperties["user.home"]!""}
 - ${name} ==> ${value}<#lt>
 </#list>
 
-11) Access Documents
+11) Access Datasources
 ---------------------------------------------------------------------------
 Get the number of documents:
-- ${Documents.size()}
-<#if !Documents.isEmpty()>
+- ${Datasources.size()}
+<#if !Datasources.isEmpty()>
 Get the first document
-- ${Documents.get(0)!"NA"}
+- ${Datasources.get(0)!"NA"}
 </#if>
 List all files containing "README" in the name
-<#list Documents.find("*README*") as document>
-- ${document.name}
+<#list Datasources.find("*README*") as datasource>
+- ${datasource.name}
 </#list>
 List all files having "md" extension
-<#list Documents.find("*.md") as document>
-- ${document.name}
+<#list Datasources.find("*.md") as datasource>
+- ${datasource.name}
 </#list>
 Get all documents
-<#list Documents.list as document>
-- ${document.name} => ${document.location}
+<#list Datasources.list as datasource>
+- ${datasource.name} => ${datasource.location}
 </#list>
 
 12) FreeMarker CLI Tools
diff --git a/freemarker-generator-cli/templates/excel/csv/custom.ftl b/freemarker-generator-cli/templates/excel/csv/custom.ftl
index 9235460..6d6f90a 100644
--- a/freemarker-generator-cli/templates/excel/csv/custom.ftl
+++ b/freemarker-generator-cli/templates/excel/csv/custom.ftl
@@ -17,8 +17,8 @@
 -->
 <#assign format = SystemTool.parameters["csv.format"]!"DEFAULT">
 <#assign salt = SystemTool.parameters["salt"]!"salt">
-<#-- Parse the first document & sheet of the Excel document -->
-<#assign workbook = ExcelTool.parse(Documents.get(0))>
+<#-- Parse the first datasource & sheet of the Excel document -->
+<#assign workbook = ExcelTool.parse(Datasources.get(0))>
 <#assign sheet = ExcelTool.getSheets(workbook)[0]>
 <#assign records = ExcelTool.toTable(sheet)>
 <#-- Setup CSVPrinter  -->
diff --git a/freemarker-generator-cli/templates/excel/csv/transform.ftl b/freemarker-generator-cli/templates/excel/csv/transform.ftl
index a1e2497..4ddc529 100644
--- a/freemarker-generator-cli/templates/excel/csv/transform.ftl
+++ b/freemarker-generator-cli/templates/excel/csv/transform.ftl
@@ -16,8 +16,8 @@
   under the License.
 -->
 <#assign format = SystemTool.parameters["csv.format"]!"DEFAULT">
-<#-- Parse the first document & sheet of the Excel document -->
-<#assign workbook = ExcelTool.parse(Documents.get(0))>
+<#-- Parse the first datasource & sheet of the Excel document -->
+<#assign workbook = ExcelTool.parse(Datasources.get(0))>
 <#assign sheet = ExcelTool.getSheets(workbook)[0]>
 <#assign records = ExcelTool.toTable(sheet)>
 <#-- Setup CSVPrinter  -->
diff --git a/freemarker-generator-cli/templates/excel/html/transform.ftl b/freemarker-generator-cli/templates/excel/html/transform.ftl
index 5fa4ad9..a261410 100644
--- a/freemarker-generator-cli/templates/excel/html/transform.ftl
+++ b/freemarker-generator-cli/templates/excel/html/transform.ftl
@@ -15,15 +15,15 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign document = Documents.get(0)>
-<#assign documentName = document.name>
-<#assign workbook = ExcelTool.parse(document)>
+<#assign datasource = Datasources.get(0)>
+<#assign name = datasource.name>
+<#assign workbook = ExcelTool.parse(datasource)>
 <#assign date = .now?iso_utc>
 <#--------------------------------------------------------------------------->
 <!DOCTYPE html>
 <html>
 <head>
-    <title>${documentName}</title>
+    <title>${name}</title>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
@@ -31,7 +31,7 @@
 <body>
 <div class="container-fluid">
     <h1>Excel Test
-        <small>${documentName}, ${date}</small>
+        <small>${name}, ${date}</small>
     </h1>
     <@writeSheets workbook/>
 </div>
diff --git a/freemarker-generator-cli/templates/excel/md/transform.ftl b/freemarker-generator-cli/templates/excel/md/transform.ftl
index 6ce112e..9b3a068 100644
--- a/freemarker-generator-cli/templates/excel/md/transform.ftl
+++ b/freemarker-generator-cli/templates/excel/md/transform.ftl
@@ -15,13 +15,13 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign document = Documents.get(0)>
-<#assign documentName = document.name>
-<#assign workbook = ExcelTool.parse(document)>
+<#assign datasource = Datasources.get(0)>
+<#assign name = datasource.name>
+<#assign workbook = ExcelTool.parse(datasource)>
 <#assign date = .now?iso_utc>
 
 <#compress>
-    # ${documentName}
+    # ${name}
     <@writeSheets workbook/>
 </#compress>
 ${'\n'}
diff --git a/freemarker-generator-cli/templates/html/csv/dependencies.ftl b/freemarker-generator-cli/templates/html/csv/dependencies.ftl
index 0eaad6c..b0df23e 100644
--- a/freemarker-generator-cli/templates/html/csv/dependencies.ftl
+++ b/freemarker-generator-cli/templates/html/csv/dependencies.ftl
@@ -15,9 +15,9 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign document = Documents.get(0)>
-<#assign documentName = document.name>
-<#assign html = JsoupTool.parse(document)>
+<#assign datasource = Datasources.get(0)>
+<#assign name = datasource.name>
+<#assign html = JsoupTool.parse(datasource)>
 
 <#compress>
     <@writeHeader/>
diff --git a/freemarker-generator-cli/templates/info.ftl b/freemarker-generator-cli/templates/info.ftl
index 9f2fbe8..3ec4891 100644
--- a/freemarker-generator-cli/templates/info.ftl
+++ b/freemarker-generator-cli/templates/info.ftl
@@ -39,10 +39,10 @@ FreeMarker CLI Tools
 </#if>
 </#list>
 
-FreeMarker CLI Documents
+FreeMarker CLI Datasources
 ---------------------------------------------------------------------------
-<#list Documents.list as document>
-[${document?counter}] ${document.name}, ${document.location}, ${document.length} Bytes
+<#list Datasources.list as datasource>
+[${datasource?counter}] ${datasource.name}, ${datasource.location}, ${datasource.length} Bytes
 </#list>
 
 User Supplied Parameters
diff --git a/freemarker-generator-cli/templates/json/csv/swagger-endpoints.ftl b/freemarker-generator-cli/templates/json/csv/swagger-endpoints.ftl
index 7e34ac5..61b9f78 100644
--- a/freemarker-generator-cli/templates/json/csv/swagger-endpoints.ftl
+++ b/freemarker-generator-cli/templates/json/csv/swagger-endpoints.ftl
@@ -15,7 +15,7 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign json = JsonPathTool.parse(Documents.get(0))>
+<#assign json = JsonPathTool.parse(Datasources.get(0))>
 <#assign basePath = json.read("$.basePath")>
 <#assign paths = json.read("$.paths")>
 
diff --git a/freemarker-generator-cli/templates/json/md/github-users.ftl b/freemarker-generator-cli/templates/json/md/github-users.ftl
index 581d1ca..5aecf18 100644
--- a/freemarker-generator-cli/templates/json/md/github-users.ftl
+++ b/freemarker-generator-cli/templates/json/md/github-users.ftl
@@ -15,7 +15,7 @@ KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
 -->
-<#assign json = JsonPathTool.parse(Documents.get(0))>
+<#assign json = JsonPathTool.parse(Datasources.get(0))>
 <#assign users = json.read("$[*]")>
 <#--------------------------------------------------------------------------->
 # GitHub Users
diff --git a/freemarker-generator-cli/templates/properties/csv/locker-test-users.ftl b/freemarker-generator-cli/templates/properties/csv/locker-test-users.ftl
index 4328182..237b71f 100644
--- a/freemarker-generator-cli/templates/properties/csv/locker-test-users.ftl
+++ b/freemarker-generator-cli/templates/properties/csv/locker-test-users.ftl
@@ -17,8 +17,8 @@
 -->
 <#compress>
     TENANT,SITE,USER_ID,DISPOSER_ID,PASSWORD,SMS_OTP,NAME,DESCRIPTION
-    <#list Documents.list as document>
-        <#assign properties = PropertiesTool.parse(document)>
+    <#list Datasources.list as datasource>
+        <#assign properties = PropertiesTool.parse(datasource)>
         <#assign environments = properties["ENVIRONMENTS"]!"">
         <#assign tenant = extractTenant(environments)>
         <#assign site = extractSite(environments)>
diff --git a/freemarker-generator-cli/templates/tsv/fo/transactions.ftl b/freemarker-generator-cli/templates/tsv/fo/transactions.ftl
index 2485e48..99b7a1c 100644
--- a/freemarker-generator-cli/templates/tsv/fo/transactions.ftl
+++ b/freemarker-generator-cli/templates/tsv/fo/transactions.ftl
@@ -16,7 +16,7 @@
   under the License.
 -->
 <#assign cvsFormat = CSVTool.formats["TDF"].withHeader()>
-<#assign csvParser = CSVTool.parse(Documents.get(0), cvsFormat)>
+<#assign csvParser = CSVTool.parse(Datasources.get(0), cvsFormat)>
 <#assign csvHeaders = csvParser.getHeaderMap()?keys>
 <#assign csvRecords = csvParser.records>
 <#--------------------------------------------------------------------------->
diff --git a/freemarker-generator-cli/templates/xml/txt/recipients.ftl b/freemarker-generator-cli/templates/xml/txt/recipients.ftl
index 434d7ea..87a9f57 100644
--- a/freemarker-generator-cli/templates/xml/txt/recipients.ftl
+++ b/freemarker-generator-cli/templates/xml/txt/recipients.ftl
@@ -15,7 +15,7 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign xml = XmlTool.parse(Documents.get(0))>
+<#assign xml = XmlTool.parse(Datasources.get(0))>
 <#list xml.recipients.person as recipient>
 To: ${recipient.name}
 ${recipient.address}
diff --git a/freemarker-generator-cli/templates/yaml/txt/transform.ftl b/freemarker-generator-cli/templates/yaml/txt/transform.ftl
index 00911bc..07160cf 100644
--- a/freemarker-generator-cli/templates/yaml/txt/transform.ftl
+++ b/freemarker-generator-cli/templates/yaml/txt/transform.ftl
@@ -15,7 +15,7 @@
   specific language governing permissions and limitations
   under the License.
 -->
-<#assign map = YamlTool.parse(Documents.get(0))>
+<#assign map = YamlTool.parse(Datasources.get(0))>
 <#--------------------------------------------------------------------------->
 <#compress>
 <@print map 1/>
diff --git a/freemarker-generator-tools/README.md b/freemarker-generator-tools/README.md
index 12d1c61..6a1e74e 100644
--- a/freemarker-generator-tools/README.md
+++ b/freemarker-generator-tools/README.md
@@ -7,9 +7,9 @@ Design Considerations
 ------------------------------------------------------------------------------
 
 * A tool shall expose a default constructor and/or a constructor taking a `Map<String, Object> settings`
-* A tool processing documents shall provide a `parse(Document document)` method
+* A tool processing datasources shall provide a `parse(Datasource)` method
 * A tool shall be stateless, multi-thread safe and potentially long-lived to enable usage in a different context
-* A tool shall support arbitrary large source documents and process them efficiently
+* A tool shall support arbitrary large source datasources and process them efficiently
 * A tool shall expose a `toString()` method for documentation purposes
 
 Available Tools
diff --git a/freemarker-generator-tools/pom.xml b/freemarker-generator-tools/pom.xml
index 32fa5b7..8a2d0c8 100644
--- a/freemarker-generator-tools/pom.xml
+++ b/freemarker-generator-tools/pom.xml
@@ -27,7 +27,7 @@
 
     <artifactId>freemarker-generator-tools</artifactId>
     <name>Apache FreeMarker Generator: Tools</name>
-    <description>Document processing tools for Apache FreeMarker Generator</description>
+    <description>Datasource processing tools for Apache FreeMarker Generator</description>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/commonscsv/CommonsCSVTool.java b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/commonscsv/CommonsCSVTool.java
index da7779a..755ea33 100644
--- a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/commonscsv/CommonsCSVTool.java
+++ b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/commonscsv/CommonsCSVTool.java
@@ -21,7 +21,7 @@ import org.apache.commons.csv.CSVParser;
 import org.apache.commons.csv.CSVPrinter;
 import org.apache.commons.csv.CSVRecord;
 import org.apache.commons.io.input.BOMInputStream;
-import org.apache.freemarker.generator.base.document.Document;
+import org.apache.freemarker.generator.base.datasource.Datasource;
 import org.apache.freemarker.generator.base.util.StringUtils;
 
 import java.io.IOException;
@@ -44,23 +44,23 @@ import static org.apache.commons.io.IOUtils.toInputStream;
 
 public class CommonsCSVTool {
 
-    public CSVParser parse(Document document) {
-        return parse(document, CSVFormat.DEFAULT);
+    public CSVParser parse(Datasource da) {
+        return parse(da, CSVFormat.DEFAULT);
     }
 
-    public CSVParser parse(Document document, CSVFormat format) {
-        if (document == null) {
-            throw new IllegalArgumentException("No document was provided");
+    public CSVParser parse(Datasource datasource, CSVFormat format) {
+        if (datasource == null) {
+            throw new IllegalArgumentException("No datasource was provided");
         }
 
         try {
             // As stated in the documentation : "If you do not read all records from the given {@code reader},
             // you should call {@link #close()} on the parser, unless you close the {@code reader}."
-            // The underlying input stream is closed by the document by its "CloseableReaper".
-            final InputStream is = new BOMInputStream(document.getInputStream(), false);
-            return parse(is, document.getCharset(), format);
+            // The underlying input stream is closed by the datasource by its "CloseableReaper".
+            final InputStream is = new BOMInputStream(datasource.getInputStream(), false);
+            return parse(is, datasource.getCharset(), format);
         } catch (IOException e) {
-            throw new RuntimeException("Failed to parse CSV: " + document, e);
+            throw new RuntimeException("Failed to parse CSV: " + datasource, e);
         }
     }
 
diff --git a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/excel/ExcelTool.java b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/excel/ExcelTool.java
index 43fa5ea..8f2d635 100644
--- a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/excel/ExcelTool.java
+++ b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/excel/ExcelTool.java
@@ -16,7 +16,7 @@
  */
 package org.apache.freemarker.generator.tools.excel;
 
-import org.apache.freemarker.generator.base.document.Document;
+import org.apache.freemarker.generator.base.datasource.Datasource;
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.ss.usermodel.CellType;
 import org.apache.poi.ss.usermodel.DataFormatter;
@@ -47,13 +47,13 @@ public class ExcelTool {
     private static final SimpleDateFormat TIME_DATE_FORMAT = new SimpleDateFormat("HH:mm:ss");
     private static final SimpleDateFormat YEAR_TIME_FORMAT = new SimpleDateFormat("yyyy");
 
-    public Workbook parse(Document document) {
-        try (InputStream is = document.getUnsafeInputStream()) {
+    public Workbook parse(Datasource datasource) {
+        try (InputStream is = datasource.getUnsafeInputStream()) {
             final Workbook workbook = WorkbookFactory.create(is);
-            // make sure that the workbook is closed together with the document
-            return document.addClosable(workbook);
+            // make sure that the workbook is closed together with the datasource
+            return datasource.addClosable(workbook);
         } catch (IOException e) {
-            throw new RuntimeException("Failed to parse Ecxel document: " + document, e);
+            throw new RuntimeException("Failed to parse Ecxel datasource: " + datasource, e);
         }
     }
 
diff --git a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/jsonpath/JsonPathTool.java b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/jsonpath/JsonPathTool.java
index 3e31ffc..1859428 100644
--- a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/jsonpath/JsonPathTool.java
+++ b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/jsonpath/JsonPathTool.java
@@ -20,15 +20,15 @@ import com.jayway.jsonpath.Configuration;
 import com.jayway.jsonpath.DocumentContext;
 import com.jayway.jsonpath.JsonPath;
 import com.jayway.jsonpath.Option;
-import org.apache.freemarker.generator.base.document.Document;
+import org.apache.freemarker.generator.base.datasource.Datasource;
 
 import java.io.IOException;
 import java.io.InputStream;
 
 public class JsonPathTool {
 
-    public DocumentContext parse(Document document) throws IOException {
-        try (InputStream is = document.getUnsafeInputStream()) {
+    public DocumentContext parse(Datasource datasource) throws IOException {
+        try (InputStream is = datasource.getUnsafeInputStream()) {
             return JsonPath.using(configuration()).parse(is);
         }
     }
diff --git a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/jsoup/JsoupTool.java b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/jsoup/JsoupTool.java
index 62d0944..0e18ad8 100644
--- a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/jsoup/JsoupTool.java
+++ b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/jsoup/JsoupTool.java
@@ -16,7 +16,7 @@
  */
 package org.apache.freemarker.generator.tools.jsoup;
 
-import org.apache.freemarker.generator.base.document.Document;
+import org.apache.freemarker.generator.base.datasource.Datasource;
 import org.jsoup.Jsoup;
 
 import java.io.IOException;
@@ -24,11 +24,11 @@ import java.io.InputStream;
 
 public class JsoupTool {
 
-    public org.jsoup.nodes.Document parse(Document document) {
-        try (InputStream is = document.getUnsafeInputStream()) {
-            return Jsoup.parse(is, document.getCharset().name(), "");
+    public org.jsoup.nodes.Document parse(Datasource datasource) {
+        try (InputStream is = datasource.getUnsafeInputStream()) {
+            return Jsoup.parse(is, datasource.getCharset().name(), "");
         } catch (IOException e) {
-            throw new RuntimeException("Failed to parse HTML document: " + document, e);
+            throw new RuntimeException("Failed to parse HTML datasource: " + datasource, e);
         }
     }
 
diff --git a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/properties/PropertiesTool.java b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/properties/PropertiesTool.java
index 96acb0d..09d2549 100644
--- a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/properties/PropertiesTool.java
+++ b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/properties/PropertiesTool.java
@@ -16,7 +16,7 @@
  */
 package org.apache.freemarker.generator.tools.properties;
 
-import org.apache.freemarker.generator.base.document.Document;
+import org.apache.freemarker.generator.base.datasource.Datasource;
 import org.apache.freemarker.generator.base.util.PropertiesFactory;
 
 import java.io.IOException;
@@ -25,11 +25,11 @@ import java.util.Properties;
 
 public class PropertiesTool {
 
-    public Properties parse(Document document) {
-        try (InputStream is = document.getUnsafeInputStream()) {
+    public Properties parse(Datasource datasource) {
+        try (InputStream is = datasource.getUnsafeInputStream()) {
             return PropertiesFactory.create(is);
         } catch (IOException e) {
-            throw new RuntimeException("Failed to parse properties: " + document, e);
+            throw new RuntimeException("Failed to parse properties: " + datasource, e);
         }
     }
 
diff --git a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/snakeyaml/SnakeYamlTool.java b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/snakeyaml/SnakeYamlTool.java
index 96bc938..1ee005d 100644
--- a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/snakeyaml/SnakeYamlTool.java
+++ b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/snakeyaml/SnakeYamlTool.java
@@ -16,7 +16,7 @@
  */
 package org.apache.freemarker.generator.tools.snakeyaml;
 
-import org.apache.freemarker.generator.base.document.Document;
+import org.apache.freemarker.generator.base.datasource.Datasource;
 import org.yaml.snakeyaml.Yaml;
 
 import java.io.IOException;
@@ -25,11 +25,11 @@ import java.util.Map;
 
 public class SnakeYamlTool {
 
-    public Map<String, Object> parse(Document document) {
-        try (InputStream is = document.getUnsafeInputStream()) {
+    public Map<String, Object> parse(Datasource datasource) {
+        try (InputStream is = datasource.getUnsafeInputStream()) {
             return new Yaml().load(is);
         } catch (IOException e) {
-            throw new RuntimeException("Failed to load YAML document: " + document, e);
+            throw new RuntimeException("Failed to load YAML datasource: " + datasource, e);
         }
     }
 
diff --git a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/xml/XmlTool.java b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/xml/XmlTool.java
index 5977ae7..a80b579 100644
--- a/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/xml/XmlTool.java
+++ b/freemarker-generator-tools/src/main/java/org/apache/freemarker/generator/tools/xml/XmlTool.java
@@ -17,7 +17,7 @@
 package org.apache.freemarker.generator.tools.xml;
 
 import freemarker.ext.dom.NodeModel;
-import org.apache.freemarker.generator.base.document.Document;
+import org.apache.freemarker.generator.base.datasource.Datasource;
 import org.xml.sax.InputSource;
 
 import java.io.InputStream;
@@ -25,11 +25,11 @@ import java.io.StringReader;
 
 public class XmlTool {
 
-    public NodeModel parse(Document document) {
-        try (InputStream is = document.getUnsafeInputStream()) {
+    public NodeModel parse(Datasource datasource) {
+        try (InputStream is = datasource.getUnsafeInputStream()) {
             return NodeModel.parse(new InputSource(is));
         } catch (Exception e) {
-            throw new RuntimeException("Failed to parse XML document: " + document, e);
+            throw new RuntimeException("Failed to parse XML datasource: " + datasource, e);
         }
     }
 
@@ -37,7 +37,7 @@ public class XmlTool {
         try (StringReader reader = new StringReader(value)) {
             return NodeModel.parse(new InputSource(reader));
         } catch (Exception e) {
-            throw new RuntimeException("Failed to parse XML document: " + value, e);
+            throw new RuntimeException("Failed to parse XML string: " + value, e);
         }
     }
 
diff --git a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/commonscsv/CommonsCSVToolTest.java b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/commonscsv/CommonsCSVToolTest.java
index 770309e..d60a070 100644
--- a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/commonscsv/CommonsCSVToolTest.java
+++ b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/commonscsv/CommonsCSVToolTest.java
@@ -20,8 +20,8 @@ import org.apache.commons.csv.CSVFormat;
 import org.apache.commons.csv.CSVParser;
 import org.apache.commons.csv.CSVPrinter;
 import org.apache.commons.csv.CSVRecord;
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentFactory;
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourceFactory;
 import org.junit.Test;
 
 import java.io.File;
@@ -48,7 +48,7 @@ public class CommonsCSVToolTest {
 
     @Test
     public void shallParseCvsFile() throws IOException {
-        try (CSVParser parser = commonsCsvTool().parse(document(), DEFAULT.withHeader())) {
+        try (CSVParser parser = commonsCsvTool().parse(datasource(), DEFAULT.withHeader())) {
             assertNotNull(parser);
             assertEquals(32, parser.getHeaderMap().size());
             assertEquals(22, parser.getRecords().size());
@@ -57,7 +57,7 @@ public class CommonsCSVToolTest {
 
     @Test
     public void shallParseCvsString() throws IOException {
-        try (CSVParser parser = commonsCsvTool().parse(document().getText(), DEFAULT.withHeader())) {
+        try (CSVParser parser = commonsCsvTool().parse(datasource().getText(), DEFAULT.withHeader())) {
             assertNotNull(parser);
             assertEquals(32, parser.getHeaderMap().size());
             assertEquals(22, parser.getRecords().size());
@@ -69,7 +69,7 @@ public class CommonsCSVToolTest {
         final CommonsCSVTool commonsCsvTool = commonsCsvTool();
         final List<String> keys;
 
-        try (CSVParser parser = commonsCsvTool.parse(document(), DEFAULT.withHeader())) {
+        try (CSVParser parser = commonsCsvTool.parse(datasource(), DEFAULT.withHeader())) {
             keys = commonsCsvTool.toKeys(parser.getRecords(), CONTRACT_ID);
         }
 
@@ -89,7 +89,7 @@ public class CommonsCSVToolTest {
         final CommonsCSVTool commonsCsvTool = commonsCsvTool();
         final Map<String, CSVRecord> map;
 
-        try (CSVParser parser = commonsCsvTool.parse(document(), DEFAULT.withHeader())) {
+        try (CSVParser parser = commonsCsvTool.parse(datasource(), DEFAULT.withHeader())) {
             map = commonsCsvTool.toMap(parser.getRecords(), CONTRACT_ID);
         }
 
@@ -102,7 +102,7 @@ public class CommonsCSVToolTest {
         final CommonsCSVTool commonsCsvTool = commonsCsvTool();
         final Map<String, List<CSVRecord>> map;
 
-        try (CSVParser parser = commonsCsvTool.parse(document(), DEFAULT.withHeader())) {
+        try (CSVParser parser = commonsCsvTool.parse(datasource(), DEFAULT.withHeader())) {
             map = commonsCsvTool.toMultiMap(parser.getRecords(), CONTRACT_ID);
         }
 
@@ -116,7 +116,7 @@ public class CommonsCSVToolTest {
         final CSVFormat cvsFormat = DEFAULT.withHeader();
         final Writer writer = new StringWriter();
 
-        try (CSVParser parser = commonsCsvTool.parse(document(), cvsFormat)) {
+        try (CSVParser parser = commonsCsvTool.parse(datasource(), cvsFormat)) {
             try (CSVPrinter printer = commonsCsvTool.printer(cvsFormat, writer)) {
                 printer.printRecord(parser.getHeaderMap());
             }
@@ -127,7 +127,7 @@ public class CommonsCSVToolTest {
 
     @Test
     public void shallStripBomFromCsvFile() throws IOException {
-        try (CSVParser parser = commonsCsvTool().parse(document(BOM_CSV), EXCEL.withHeader().withDelimiter(';'))) {
+        try (CSVParser parser = commonsCsvTool().parse(datasource(BOM_CSV), EXCEL.withHeader().withDelimiter(';'))) {
             assertEquals("Text", parser.getHeaderNames().get(0));
         }
     }
@@ -139,12 +139,12 @@ public class CommonsCSVToolTest {
         assertEquals('^', commonsCsvTool().toDelimiter("^"));
     }
 
-    private Document document() {
-        return document(TEST_CSV);
+    private Datasource datasource() {
+        return datasource(TEST_CSV);
     }
 
-    private Document document(File file) {
-        return DocumentFactory.create(file, UTF_8);
+    private Datasource datasource(File file) {
+        return DatasourceFactory.create(file, UTF_8);
     }
 
     private CommonsCSVTool commonsCsvTool() {
diff --git a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/excel/ExcelToolTest.java b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/excel/ExcelToolTest.java
index 9003a38..1583001 100644
--- a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/excel/ExcelToolTest.java
+++ b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/excel/ExcelToolTest.java
@@ -16,8 +16,8 @@
  */
 package org.apache.freemarker.generator.tools.excel;
 
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentFactory;
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourceFactory;
 import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
 import org.junit.Test;
@@ -102,14 +102,14 @@ public class ExcelToolTest {
     }
 
     private Workbook workbook(File file) {
-        return excelTool().parse(document(file));
+        return excelTool().parse(datasource(file));
     }
 
     private ExcelTool excelTool() {
         return new ExcelTool();
     }
 
-    private Document document(File file) {
-        return DocumentFactory.create(file, UTF_8);
+    private Datasource datasource(File file) {
+        return DatasourceFactory.create(file, UTF_8);
     }
 }
diff --git a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/properties/PropertiesToolTest.java b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/properties/PropertiesToolTest.java
index 8e010e7..3a29908 100644
--- a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/properties/PropertiesToolTest.java
+++ b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/properties/PropertiesToolTest.java
@@ -16,8 +16,8 @@
  */
 package org.apache.freemarker.generator.tools.properties;
 
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentFactory;
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourceFactory;
 import org.junit.Test;
 
 import static junit.framework.TestCase.assertEquals;
@@ -27,9 +27,9 @@ public class PropertiesToolTest {
     private static final String ANY_PROPERTIES_STRING = "foo=bar";
 
     @Test
-    public void shallParsePropertiesDocument() {
-        try (Document document = document(ANY_PROPERTIES_STRING)) {
-            assertEquals("bar", propertiesTool().parse(document).getProperty("foo"));
+    public void shallParsePropertiesDatasource() {
+        try (Datasource datasource = datasource(ANY_PROPERTIES_STRING)) {
+            assertEquals("bar", propertiesTool().parse(datasource).getProperty("foo"));
         }
     }
 
@@ -42,7 +42,7 @@ public class PropertiesToolTest {
         return new PropertiesTool();
     }
 
-    private Document document(String value) {
-        return DocumentFactory.create("test.properties", value);
+    private Datasource datasource(String value) {
+        return DatasourceFactory.create("test.properties", value);
     }
 }
diff --git a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/snakeyaml/SnakeYamlToolTest.java b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/snakeyaml/SnakeYamlToolTest.java
index 4a522b6..ee34a28 100644
--- a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/snakeyaml/SnakeYamlToolTest.java
+++ b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/snakeyaml/SnakeYamlToolTest.java
@@ -16,8 +16,8 @@
  */
 package org.apache.freemarker.generator.tools.snakeyaml;
 
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentFactory;
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourceFactory;
 import org.junit.Test;
 
 import java.util.List;
@@ -34,9 +34,9 @@ public class SnakeYamlToolTest {
             "    - image: postgres:9.4.1";
 
     @Test
-    public void shallParseYamlDocument() {
-        try (Document document = document(ANY_YAML_STRING)) {
-            final Map<String, Object> map = snakeYamlTool().parse(document);
+    public void shallParseYamlDatasource() {
+        try (Datasource datasource = datasource(ANY_YAML_STRING)) {
+            final Map<String, Object> map = snakeYamlTool().parse(datasource);
 
             assertEquals(1, map.size());
             assertEquals(3, ((List<?>) map.get("docker")).size());
@@ -55,7 +55,7 @@ public class SnakeYamlToolTest {
         return new SnakeYamlTool();
     }
 
-    private Document document(String value) {
-        return DocumentFactory.create("test.yml", value);
+    private Datasource datasource(String value) {
+        return DatasourceFactory.create("test.yml", value);
     }
 }
diff --git a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/xml/XmlToolTest.java b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/xml/XmlToolTest.java
index de69881..79a5432 100644
--- a/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/xml/XmlToolTest.java
+++ b/freemarker-generator-tools/src/test/java/org/apache/freemarker/generator/tools/xml/XmlToolTest.java
@@ -17,8 +17,8 @@
 package org.apache.freemarker.generator.tools.xml;
 
 import freemarker.ext.dom.NodeModel;
-import org.apache.freemarker.generator.base.document.Document;
-import org.apache.freemarker.generator.base.document.DocumentFactory;
+import org.apache.freemarker.generator.base.datasource.Datasource;
+import org.apache.freemarker.generator.base.datasource.DatasourceFactory;
 import org.junit.Test;
 
 import static junit.framework.TestCase.assertEquals;
@@ -35,9 +35,9 @@ public class XmlToolTest {
             "</note>";
 
     @Test
-    public void shallParseXmlDocument() throws Exception {
-        try (Document document = document(ANY_XML_STRING)) {
-            final NodeModel model = xmlTool().parse(document);
+    public void shallParseXmlDatasource() throws Exception {
+        try (Datasource datasource = datasource(ANY_XML_STRING)) {
+            final NodeModel model = xmlTool().parse(datasource);
 
             assertNotNull(model);
             assertEquals(1, model.getChildNodes().size());
@@ -56,7 +56,7 @@ public class XmlToolTest {
         return new XmlTool();
     }
 
-    private Document document(String value) {
-        return DocumentFactory.create("test.xml", value);
+    private Datasource datasource(String value) {
+        return DatasourceFactory.create("test.xml", value);
     }
 }