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   RE: [xml-dev] Co-operating with Architectural Forms

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Still, one has to account for multiple interpreters 
one of which is the author.  It is useful to know who 
is authoritative or dominant in a communication.  While 
the system need not enforce a relationship in the 
instance, one should provide that information when 

How would you envision a layer or layers that then 
includes the principal and auxiliary types first? 
Then the architectural types?

Next, how would DTDs have to change to support that 

What should the instance signal to associate itself 
to these layers?


-----Original Message-----
From: Gavin Thomas Nicol [mailto:gtn@rbii.com]

On Friday 01 February 2002 07:18 pm, Joe English wrote:
> Having thought more about the second question, I now believe that
> the only thing that's intrinsic to an XML document is
> the stuff that's manifest in the parse tree: GIs, attributes,
> and content.  Everything else -- the principal type, auxilliary
> types, architectural forms, etc., -- are imposed by the observer.

Precisely what I have been saying.... (though I would say "interpreter 
rather than "observer").

In compilers, you usually (not always, usually)  go from 
source->AST->object tree with something doing the conversion from 
AST->object. XML is the same. The XML core DOM is roughly an AST... 
and we interpret that as we wish. Even humans go through the phase of 
parsing into "elements" then determining their "type" .

The magic is is in the interpreter, not the data.

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