maven/maven-core-it/it2002/project/subproject/pom.xml

<project>
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.apache.maven.it2002</groupId>
    <artifactId>project</artifactId>
    <version>1.0-SNAPSHOT</version>
  </parent>

  <artifactId>project-sub1</artifactId>

</project>