]> This is a simple demo ontology of how to do classes as values using individuals. It would best be done with puns in OWL 1.1 but since that is not yet available... NB. For technical reasons I have defined the property dc-subject rather than imported Dublin core properly Any book that is about the class of lions - not some individual. A proxy for the standard Dublin Core dc:subject. Defined here to avoid imports and technical issues with domains which would just confuse the primary issue. A relation between individual classes mirroring the subclass relationship inferred by the reasoner amongst classes. This mirroring must be maintained outside the reasoner and is not visible to it. It is usually best to have a direct-subclass relation which relates to this specific ontology, but not necessary. For some applications, the metaclasses should be closed, i.e. they represent the representation rather than the class. The book "Born Free" about "Elsie" the Lion. The lion in the book "Born Free" The specific book "Life of the Pride"