# File lib/buildr/packaging/artifact.rb, line 148
    def pom_xml
      xml = Builder::XmlMarkup.new(:indent=>2)
      xml.instruct!
      xml.project do
        xml.modelVersion  '4.0.0'
        xml.groupId       group
        xml.artifactId    id
        xml.version       version
        xml.classifier    classifier if classifier
      end
    end