Adrian:  (01)
Thank you for this feedback. I had a thought strike me whilst reading. 
Please forgive the naive nature of this question.  (02)
Is it true that a formal ontology is a circular reference pattern, 
albeit a very indirect, complicated and very large one? Does any 
definition assume the knowledge of other axioms in a model, that 
themselves may be dependent upon the definition one is trying to clarify?  (03)
This is probably a newbie question answered in Ontology 101.  (04)
Duane  (05)
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http://www.adobe.com/enterprise/developer/main.html
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