maven org.apache.maven 2.0-beta-4-SNAPSHOT 4.0.0 org.apache.maven maven-repository-metadata Maven Repository Metadata Model 2.0-beta-4-SNAPSHOT Maven Plugin Mapping org.codehaus.modello modello-maven-plugin RELEASE xpp3-writer java xpp3-reader xsd 1.0.0 src/main/mdo/metadata.mdo plexus plexus-utils