Chris@0: 
Chris@0: PREFIX vamp: <http://purl.org/ontology/vamp/>
Chris@0: PREFIX examples: <http://vamp-plugins.org/rdf/plugins/vamp-example-plugins#>
Chris@0: 
Chris@0: SELECT ?plugin ?library_id ?plugin_id
Chris@0: FROM <http://vamp-plugins.org/rdf/plugins/vamp-example-plugins>
Chris@0: 
Chris@0: WHERE {
Chris@0:       ?plugin a vamp:Plugin .
Chris@0:       ?plugin vamp:identifier ?plugin_id .
Chris@0:       OPTIONAL { ?library a vamp:PluginLibrary .
Chris@0:             ?library vamp:identifier ?library_id .
Chris@0: 	          ?library vamp:available_plugin ?plugin . }
Chris@0: }
Chris@0: