Web Ontology Language = OWL

• OWL is an extra layer, a bit like RDF Schemas

• • own namespace, own terms
  • it relies on RDF Schemas

• It is a separate recommendation

• There is an active W3C Working Group working on extensions of the current standards

• • the new version will be called “OWL 2”
  • in what follows, some features will be referred to as “may come in future”, i.e., under consideration by that group