At 12/2/2012 11:57 PM, John Sowa wrote:
[KI
> entity relationship model semantics can exist in self-describing structured data.

Yes. E-R diagrams were introduced in 1976. Even earlier, there were
Bachman diagrams, type hierarchies, and Petri nets. Versions of all
those diagrams were combined in UML,
No. UML was developed specifically to support object-oriented program design, and had only minimal relationship to the earlier E/R notations.

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