DAML+OIL for Application Developers - slide "daml:hasValue"

we can define classes based on property values, e.g.


<daml:Class rdf:ID="Male">
  <daml:sameClassAs>
    <daml:Restriction>
      <daml:onProperty rdf:resource="#gender"/>
      <daml:hasValue rdf:resource="#male"/>
    </daml:Restriction>
  </daml:sameClassAs>
</daml:Class>