<modelVersion>4.0.0</modelVersion>

    <groupId>test</groupId>
    <artifactId>other</artifactId>
    <version>0.1-SNAPSHOT</version>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.junit</groupId>
                <artifactId>bom</artifactId>
                <version>0.1</version>
                <type>pom</type>

  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>cyclic-reference</groupId>
    <artifactId>parent</artifactId>
    <version>1.0-SNAPSHOT</version>
  </parent>
  <artifactId>module-b</artifactId>

  <dependencies>
    <dependency>
      <groupId>cyclic-reference</groupId>
      <artifactId>module-a</artifactId>
      <version>1.0-SNAPSHOT</version>
    </dependency>
  </dependencies>

                    String artifactId = getChildText(pluginElement, ARTIFACT_ID);

                    // Default groupId for Maven plugins
                    if (groupId == null && artifactId != null && artifactId.startsWith(MAVEN_PLUGIN_PREFIX)) {
                        groupId = DEFAULT_MAVEN_PLUGIN_GROUP_ID;
                    }

                    if (groupId != null && artifactId != null) {

    <groupId>org.apache.maven.its</groupId>
    <artifactId>parent</artifactId>
    <version>0.1</version>
    <packaging>pom</packaging>

    <name>Maven Integration Test :: Dummy Parent</name>

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>0.1</version>
                </plugin>

			<url url="${repo.url}/${jar.groupId}/${jar.artifactId}/${jar.version}/${jar.artifactId}-${file.version}.jar" />
		</get>
		<copy file="${target.dir}/${jar.artifactId}-${file.version}.jar"
			todir="${crawler.dir}/lib"/>
		<copy file="${target.dir}/${jar.artifactId}-${file.version}.jar"
			todir="${suggest.dir}/lib"/>
		<copy file="${target.dir}/${jar.artifactId}-${file.version}.jar"
			todir="${thumbnail.dir}/lib"/>
	</target>

 the Maven Repository Metadata file contains 3 different sets of metadata:

 [[1]] in a "groupId" directory: a "groupId" directory may contain Maven plugins artifacts, which are described in metadata's <<<plugins>>> element,

 [[2]] in a "groupId/artifactId" directory: metadata describes <<<groupId>>>, <<<artifactId>>> and <<<versioning>>> element that

    <groupId>org.apache.maven.its</groupId>
    <artifactId>bom</artifactId>
    <version>0.1</version>
    <packaging>pom</packaging>

    <name>Maven Integration Test :: Dummy BOM</name>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.apache.maven.its</groupId>
                <artifactId>a</artifactId>
                <version>0.1</version>
            </dependency>

    <modelVersion>4.0.0</modelVersion>

    <groupId>test</groupId>
    <artifactId>test</artifactId>
    <version>0.1-SNAPSHOT</version>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>test</groupId>
                <artifactId>mydep</artifactId>
                <version>0.2</version>
            </dependency>
            <dependency>

    <modelVersion>4.0.0</modelVersion>

    <groupId>test</groupId>
    <artifactId>test</artifactId>
    <version>0.1-SNAPSHOT</version>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>test</groupId>
                <artifactId>other</artifactId>
                <version>0.1-SNAPSHOT</version>
                <type>pom</type>

-->

<project>
  <modelVersion>4.0.0</modelVersion>
  <artifactId>aid</artifactId>
  <groupId>gid</groupId>
  <version>0.1</version>

  <dependencies>
    <dependency>
      <groupId>test</groupId>
      <artifactId>a</artifactId>
      <version>0.2</version>
    </dependency>
    <dependency>
      <groupId>test</groupId>
      <artifactId>b</artifactId>
      <version>${missing.property}</version>
    </dependency>