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   RE: XML Information Set Requirements, W3C Note 18-February-1999

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  • From: <Michael.Orr@Design-Intelligence.com>
  • To: <nate@valleytel.net>, <xml-dev@ic.ac.uk>
  • Date: Fri, 19 Feb 1999 16:01:13 -0800

> -----Original Message-----
> From: Nathan Kurz [mailto:nate@valleytel.net]
> Sent: Friday, February 19, 1999 1:13 PM
> Subject: Re: XML Information Set Requirements, W3C Note 18-February-1999
> Michael Orr writes:
> > For instance, is one aspect of your thinking a desire to chunk an
> > "XML stream" so that validation can be performed incrementally,
> > while still wishing the XML rec to govern the overall
> > well-formedness (?) of the stream as a whole? Or is this totally off
> > base? I'm groping to understand the point of view you're promoting
> > here...
> To me at least, validation isn't that important.  So long as the parts
> I choose to parse are well-formed, I don't care if the whole stream is
> well-formed.  And if the stream is continuous (for example, an XML
> stock ticker) even the concept of a well-formed stream seems tenuous.

If you're not interested in the whole stream (or bigger than parse-sized
chunks) being well-formed or valid, then by definition you don't have a
document-too-big-to-construct-the-info-set problem. 

That's why Clark's question suggested to me an interest in scenarios
where DTDs or schemas would be used to express the organization of the
stream itself, whatever that might mean in an application context. 

Again, I'm not suggesting that the concerns re stream-oriented
applications aren't real, I'm just trying to get a conceptual grip on


Michael Orr, CTO, VP R&D
Design Intelligence Inc, Seattle WA USA
pager:888-688-4609  fax:206-343-7750

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