Web Ontology Language (OWL)

Web Ontology Language

OWL builds on RDFS to support richer knowledge representation and logical reasoning.

• Namespace: http://www.w3.org/2002/07/owl (prefix: owl:)
• Purpose: define ontologies with precise semantics and reasoning.
• Key terms:
  • owl:equivalentClass: two classes are the same.
  • owl:equivalentProperty: two properties are the same.
  • owl:sameAs: two instances are identical
  • owl:disjointWith: two classes share no members.
• Example:

dbo:Automobile owl:equivalentClass schema:Car

• Links: OWL extends RDFS; used alongside vocabularies like