OWL Examples: Properties

• One can also define sub-properties
  • eg, by restricting the domain or the range:

     <owl:ObjectProperty rdf:ID="GraphicsSubType">

       <rdfs:subPropertyOf rdf:resource="#GraphicsType"/>

       <rdfs:range rdf:resource="#graphicsSubType"/>

     </owl:ObjectProperty>

• Restrict the cardinality of values for a class:

       ....

       <owl:cardinality> 1 </owl:cardinality>

       ....

• Properties may map to datatypes:

     <owl:DatatypeProperty rdf:ID="IsAnchor">

       <rdfs:range rdf:resource="xsd:Boolean"/>

       <rdfs:domain rdf:resource="#SvgEntity"/>

     </owl:DatatypeProperty >

• datatypes may be floats, integers, strings, ...