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RE: Finally, what if namespaces == document types ?

  • To: xml-dev@l...
  • Subject: RE: Finally, what if namespaces == document types ?
  • From: Pete Kirkham <pete.kirkham@b...>
  • Date: Wed, 23 Jan 2002 11:22:55 +0000

RE:  Finally
>Whenever someone process a document XML representing an invoice 
>(if that ever happens), he is processing the data at the semantic 
>level, not the lexical level. 

He is, as he is (or is under the illusion of) ascribing meaning to the symbols he 
is manipulating.

>Maybe my choice of the 'semantic' word is unfortunate. 

Semantics is the mapping of syntactically processed symbols to meaning (at least in 
the usages I most often experience).

>I'm not saying that the program understand the data, of course. 
>I just mean that processing the data implies looking one level above the 
> element level, and to process patterns rather than just elements.

That level would be syntactic not semantic, looking at what a program actually does 
when processing an invoice, it is all based on operations defined by symbol 
matching (lexical) and symbol location and sequence (syntactic).

That a task may be automated by a deterministic system directly implies that it is 
syntactic rather than semantic in nature.

Not that the illusion of meaning when typing '2+2=' into a calculator isn't useful.


Pete Kirkham



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