maven org.apache.maven 2.0-beta-1-SNAPSHOT 4.0.0 org.apache.maven maven-model 2.0-beta-1-SNAPSHOT Maven Model Maven Model plexus plexus-utils 1.0-alpha-3 org.codehaus.modello modello-maven-plugin 1.0-alpha-3 4.0.0 maven.mdo xpp3-writer java xpp3-reader xsd