Miscellaneous possibilities

• Equivalence of Properties (or Classes):

    <owl:ObjectProperty rdf:about="#GraphicsType">

      <owl:equivalentProperty 

          rdf:resource="http://.../#TypeDeGraphique"/>

    </owl:OpjectProperty>

    ...

    <owl:Class rdf:ID="FootballTeam">

      <owl:sameAs rdf:resource="http://sports.org/US#SoccerTeam"/>

    </owl:OpjectProperty>

• one can also assert differences
• Restriction of a property for a class (rather than in general)
• Importing other vocabularies:

    <owl:imports rdf:resource="http://...."/>

• Annotations, version control