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   RE: [xml-dev] Subtyping in XML

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Thanks Henry.  That points in the direction I 
suspected it did.  In a sense, as the RDF folks 
pointed out to us, a weak ontology.  That is 
not a criticism.  Weak ontologies are a fact 
of life.   Living and or any adaptive systems 
have a way of overcoming constraints, so at 
the top levels, hard constraints are *typically* 
artificial or viewpoint-oriented.  Depending 
on the object of the model, a weak ontology 
may be quite precise (or as precise as is 


From: ht@cogsci.ed.ac.uk [mailto:ht@cogsci.ed.ac.uk]

"Bullard, Claude L (Len)" <clbullar@ingr.com> writes:

> How does one make an abstract type "generous"?

Judicious use of wildcards and/or elements with ur-type so they can be 
substituion group heads w/o much constraint.

> Serious question because of one design I've 
> worked on that insists on a primary schema 
> with derived secondary schemas.  To me the 
> term "generous" resonates with what is to 
> be achieved in that design, so I would like 
> to understand you more formally.

Understood -- I wish I could say something more formally.


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