Leo, (01)
At the risk of dragging this out... (02)
On Feb 27, 2006, at 13:39 , Obrst, Leo J. wrote: (03)
> LEO: Yes, I tried to make a rhetorically strong point by using
> 99% ;) I
> would say that data modelers start out trying to capture their local
> semantics in a conceptual model (I used this as synonymous with
> "conceptual schema" because that's my usage and most database folks).
> This is not necessarily about the real world, just their corner of it,
> with entities such as purchasingDept, payroll, VSAM storage, employee
> and employee identifier, specific Bureau of Labor reports, etc. Yes,
> these items are all in the real world, but do they involve ontological
> entities in the way we usually understand them? I think not. (04)
That's just false, Leo. I'd point you again to Bill Kent's "Data and
Reality" or David Hay's "Data Model Patterns: Conventions of
Thought". These guys seem to have a much better grip on ontology in
their recommendations for data modeling than that exhibited in 99% of
the "real" ontologies I've seen written in places like (05)
http://www.schemaweb.info/ (06)
> They do
> try to capture the local semantics needed for the local data
> store/application. (07)
Sometimes yes. Sometimes no. (08)
Bill Andersen (andersen@xxxxxxxxxxxxxxxxx)
Chief Scientist
Ontology Works, Inc. (www.ontologyworks.com)
3600 O'Donnell Street, Suite 600
Baltimore, MD 21224
Office: 410-675-1201
Cell: 443-858-6444 (09)
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