[MNG-8084] Include repository metadata in the API

api/maven-api-metadata/pom.xml

@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.maven</groupId>
+    <artifactId>maven-api</artifactId>
+    <version>4.0.0-alpha-14-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>maven-api-metadata</artifactId>
+
+  <name>Maven 4 API :: Repository Metadata</name>
+  <description>Maven 4 API - Immutable Repository Metadata model.</description>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-api-xml</artifactId>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.modello</groupId>
+        <artifactId>modello-maven-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>plugin</id>
+            <goals>
+              <goal>velocity</goal>
+            </goals>
+            <phase>generate-sources</phase>
+            <configuration>
+              <velocityBasedir>${project.basedir}/../../src/mdo</velocityBasedir>
+              <version>1.2.0</version>
+              <models>
+                <model>src/main/mdo/metadata.mdo</model>
+              </models>
+              <templates>
+                <template>model.vm</template>
+              </templates>
+              <params>
+                <param>packageModelV4=org.apache.maven.api.metadata</param>
+              </params>
+            </configuration>
+          </execution>
+          <execution>
+            <id>plugin-doc</id>
+            <goals>
+              <goal>xdoc</goal>
+              <goal>xsd</goal>
+            </goals>
+            <phase>generate-resources</phase>
+            <configuration>
+              <version>1.2.0</version>
+              <models>
+                <model>src/main/mdo/metadata.mdo</model>
+              </models>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <excludes>
+            <exclude>**/package-info.java</exclude>
+          </excludes>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

api/maven-api-metadata/src/main/java/org/apache/maven/api/plugin/descriptor/lifecycle/package-info.java

@@ -0,0 +1,5 @@
+// CHECKSTYLE_OFF: RegexpHeader
+/**
+ * Maven Plugin forked lifecycle model.
+ */
+package org.apache.maven.api.plugin.descriptor.lifecycle;

api/maven-api-metadata/src/main/java/org/apache/maven/api/plugin/descriptor/package-info.java

@@ -0,0 +1,5 @@
+// CHECKSTYLE_OFF: RegexpHeader
+/**
+ * Maven Plugin descriptor model.
+ */
+package org.apache.maven.api.plugin.descriptor;