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Web Ontology Language (OWL)

  • RDFS has a number of Limitations:
    • Only binary relations
    • Characteristics of Properties, e.g. inverse , transitive , symmetric
    • Local range restrictions, e.g. for class Person , the property hasName has range xsd:string
    • Complex concept descriptions, e.g. Person is defined by Man and Woman
    • Cardinality restrictions, e.g. a Person may have at most 1 name
    • Disjointness axioms, e.g. nobody can be both a Man and a Woman
  • The Web Ontology Language (OWL) provides an ontology language, that is a more expressive Vocabulary Definition Language for use with RDF
    • Class membership
    • Equivalance of classes
    • Consistency
    • Classification

Speaker notes:

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