Ontologies

Ontologies are used to describe concepts on the Semantic Web and generally consist of a graph of classes and properties expressed in OWL, RDFS, or similar. OMRAS2 introduces the Music Ontology for describing music-related concepts, the Audio Features Ontology for describing audio signal analysis results, the Chord Ontology for describing chords and chord sequences, and the Vamp Plugin Ontology for describing data associated with Vamp plugins.