: Ontologyhttp://purl.org/NET/c4dm/event.owl# Create a prefix for http://purl.org/NET/c4dm/event.owl# Hit Enter to save Double click to create a prefix | rdfs:subClassOf | : Vocabularyhttp://purl.org/vocommons/voaf# Create a prefix for http://purl.org/vocommons/voaf# Hit Enter to save Double click to create a prefix |