6. The method of claim 1 wherein the query expressed in the ontology language includes at least one condition that must be satisfied by at least one value of a property or composition of properties defined on the at least one subject class.
6. The method of claim 1 wherein the query expressed in the ontology language includes at least one condition that must be satisfied by at least one value of a property or composition of properties defined on the at least one subject class. 7. The method of claim 6 wherein the property or composition of properties defined on the at least one subject class, is inherited from a property or composition of properties defined on a superclass of the subject class.