9. The method of claim 1 , wherein the definition of the instance comprises an identifier of the concept associated with the instance, wherein the instance structure further comprises the identifier of the concept, and wherein the method further comprises using the identifier of the concept in the instance structure to determine, from the user ontological model, the concept that is associated with the instance.
9. The method of claim 1 , wherein the definition of the instance comprises an identifier of the concept associated with the instance, wherein the instance structure further comprises the identifier of the concept, and wherein the method further comprises using the identifier of the concept in the instance structure to determine, from the user ontological model, the concept that is associated with the instance. 46. The method of claim 9 , wherein the user ontological model comprises the concept.