maven-component org.apache.maven 2.0-SNAPSHOT 4.0.0 org.apache.maven maven-model Maven Model 2.0-SNAPSHOT Maven Model plexus plexus-utils 1.0-alpha-2 org.apache.maven.plugins maven-modello-plugin 1.0-alpha-1 4.0.0 maven.mdo xpp3-writer java xpp3-reader