<modelVersion>4.0.0</modelVersion>
  <groupId>com.example.group</groupId>
  <artifactId>testinvalidpom</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <build>
    <pluginManagement>
      <plugins>
        <plugin>
          <groupId>the.group.id</groupId>
          <artifactId>the.artifact</artifactId>
          <version/>
        </plugin>
      </plugins>

 Depending on what the directory represents ("groupId", "groupId/artifactId" or "groupId/artifactId/version"),
 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

    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-model</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-core</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-di</artifactId>
    </dependency>
  </dependencies>

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-api</artifactId>
    <version>4.0.0-beta-6-SNAPSHOT</version>
  </parent>

  <artifactId>maven-api-cli</artifactId>
  <name>Maven 4 API :: CLI</name>
  <description>Maven 4 API - CLI.</description>

  <dependencies>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-meta</artifactId>

      <groupId>org.apache.maven</groupId>
      <artifactId>maven-builder-support</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-settings</artifactId>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-sec-dispatcher</artifactId>
    </dependency>

    <dependency>
      <groupId>javax.inject</groupId>

/**
 * Metadata for the group directory of the repository.
 *
 */
@Deprecated
public class GroupRepositoryMetadata extends AbstractRepositoryMetadata {
    private final String groupId;

    public GroupRepositoryMetadata(String groupId) {
        super(new Metadata());
        this.groupId = groupId;
    }

    public boolean storedInGroupDirectory() {
        return true;

                Arguments.of(null, "artifactId", "1.0"),
                Arguments.of("", "artifactId", "1.0"),
                Arguments.of("groupId", null, "1.0"),
                Arguments.of("groupId", "", "1.0"),
                Arguments.of("groupId", "artifactId", null),
                Arguments.of("groupId", "artifactId", ""));
    }

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven</artifactId>
    <version>4.0.0-beta-6-SNAPSHOT</version>

    <relativePath>../../</relativePath>
  </parent>

  <artifactId>maven-artifact</artifactId>

  <name>Maven Artifact</name>

  <dependencies>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-api</artifactId>

        this.groupId = groupId;
        this.artifactId = artifactId;
        this.version = version;
        this.type = type;
        this.baseMessage = message;
    }

    public InvalidArtifactRTException(
            String groupId, String artifactId, String version, String type, String message, Throwable cause) {
        super(cause);

        this.groupId = groupId;
        this.artifactId = artifactId;

-->

<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>0.2</version>
      <scope>compile</scope>