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OWL
Property Restrictions (cont.)


  • Formally:
    • owl:Restriction defines a blank node with restrictions
      • refer to the property that is constrained
      • define the restriction itself
    • one can, e.g., subclass from this node, or…
    • …use intersection of several property constraints, or…
    • …declare the class to be equal to it

Ivan Herman, W3C 97 (144)