Reporting plugins are configured in the POM as in this example:
Configuration in the reporting section also applies if plugin goals are invoked individually. The converse is not true-- if you configure the plugin inside <build>, that configuration will NOT apply to <reporting>.
Configuring multiple reports for one plugin using <reportSets>. Each <reportSet> must have a unique <id>. The UMLGraph doclet used in the example is NOT available in any Maven repository. For more information on UMLGraph, see the UMLGraph site and this page.