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   RE: [xml-dev] The triples datamodel -- was Re: [xml-dev] Semantic Web pe

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  • To: "Mark Baker" <distobj@acm.org>,"Elliotte Rusty Harold" <elharo@metalab.unc.edu>
  • Subject: RE: [xml-dev] The triples datamodel -- was Re: [xml-dev] Semantic Web permathread, iteration n+1
  • From: "Dare Obasanjo" <dareo@microsoft.com>
  • Date: Sat, 5 Jun 2004 15:33:33 -0700
  • Cc: "XML Developers List" <xml-dev@lists.xml.org>
  • Thread-index: AcRLRBdpIPZp7WNRQqCBgoM9vLtdEgABzfji
  • Thread-topic: [xml-dev] The triples datamodel -- was Re: [xml-dev] Semantic Web permathread, iteration n+1

The claim that XML was self describing was bogus in the first place and was part of the yester-years XML hype. As for your definition of self describing at http://www.markbaker.ca/Talks/2004-xmlself/slide11-0.html doesn't jibe with the real world. Who develops applications by HTTP GETing a resource, checking the media type and then reading the appropriate RFC? 
So it seems your claim at http://www.markbaker.ca/Talks/2004-xmlself/slide20-0.html is that I can' t arbitrarily extend an XML document without it's schema or without breaking some application somewhere. I'm unclear as to what you mean by the document's schema but will grant that it is likely that arbitrary additions to an expected content of an XML document will break certain applications. 
I finally got to http://www.markbaker.ca/Talks/2004-xmlself/slide24-0.html and don't much understand what you are getting at. I'm not sure what difference there is in extending a format by adding namespaced extensions and using RDF in the way you describe. You claim that one can use HTTP GET on RDF URIs but similarly one can use HTTP GET on the namespace of extension elements and attributes. This isn't theoretical, this is how most people working with XML formats like RSS (even the RDF flavor) do it today. 
There are always two solutions to the problem: yours and the boss's. 


From: Mark Baker [mailto:distobj@acm.org]
Sent: Sat 6/5/2004 2:26 PM
To: Elliotte Rusty Harold
Cc: XML Developers List
Subject: Re: [xml-dev] The triples datamodel -- was Re: [xml-dev] Semantic Web permathread, iteration n+1

> I
> agree that XML document should be Extensible.  I disagree that plain
> vanilla XML documents aren't extensible.

I claim that XML isn't *self-descriptively* extensible, and that RDF/XML
is, making RDF/XML a "better XML" of sorts.  FWIW, I gave a presentation
on this subject earlier this year;


Mark Baker.   Ottawa, Ontario, CANADA.        http://www.markbaker.ca

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