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   Re: [xml-dev] DTDs, W3C Schemas, RELAX NG, Schematron?

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[Walter Perry]
 >I have spent more than twenty years working with applications built on RDBMs
 >and relational wannabes. They are great and useful tools, but only in an
 >homogenous enterprise network where the processing nodes have intimate
 >(white box) knowledge of each others' processing and base their
i>nteroperability on working against identical data structures. Those are
 >precisely not the conditions of the internetwork topology.

Right. Its CORBA all over again except significantly less well done.
CORBA was tightly coupled systems over loosely coupled wires.
This tight coupling is precisely how not to create web services in
my opinion and yet it is precisely where PSVI/Value Space XML leads

I suspect the trouble is that too many people out there think that CORBA
did not fly because it was too heavy and that the new XML based stuff
will because it is lighter.

Maybe they are right but I doubt it. CORBA did not fly because it successfully
designed away the network allowing you to create tightly coupled, monolithic
systems that functioned over long wires :-/



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