9. Computer apparatus as claimed in claim 7 wherein the newly created item in the creation event is a new class.
7. Computer apparatus for creating and extending ontology in semantic modeling, comprising: a support module executed by a computer and responsive to a creation event in a semantic modeling type working process having one or more models modeling meaning of information and situations, the support module defining ontology specification for a newly created item, in the creation event, in a manner being substantially part of the working process during modeling, wherein the models are any of a graphical representation and text representation; and an ontology manager executed by a computer and incorporating the defined ontology specification into an ontology resulting in one of a created ontology and an extended ontology on-demand and as needed during modeling, the ontology defining a hierarchy of concept classes and relationships that may exist on instances of the classes in the models.