he property in 
RDF</a>. A slot in an instance of CLOS is captured as one element of the 
extension of a property of slot name. In CLOS, we have the slot-definition 
objects that are allocated for a class metaobject and shared by its instances. A 
slot definition object in a class holds a slot-name and a type constraint for 
the slot value. SWCLOS also keeps the subject information on the property 
extension in the slot-definition objects. Furthermore, every slot definition 
object for a RDF entity is linke