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   RE: [xml-dev] xml schema

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After rereading his article it really does look like it needs a rebuttal or clarification for almost every point he raises. His "avoid local element declarations" should really be "always use elementFormDefault=qualified" with an explanation as to why. The advice on avoiding chameleon schemas could be fleshed out. His advice on substitution groups could do with more explanation and less "This is a big, bad scary feature". The last part of the substitution groups section that claims it is impractical to use substitution groups in the real world is in blatant contradiction given the number of real world schemas that use substitution groups from XBRL to OAGIS to FpML. 
Talk of the value of inheritance and the like needs to be recouched now that XQuery and XSLT 2.0 are on the horizon and can actually operate on types based on inheritance hierarchy. 
I also feel that his prohibition against global attribute declarations should have been an explanation of how things work. This is the tack I favored in this month's "Working With Namespaces in W3C XML Schema" 

	-----Original Message----- 
	From: Mark Seaborne [mailto:MSeaborne@origoservices.com] 
	Sent: Mon 9/2/2002 7:40 AM 
	To: xml-dev@lists.xml.org 
	Subject: RE: [xml-dev] xml schema

	-----Original Message-----
	From: Dare Obasanjo [mailto:dareo@microsoft.com]
	Sent: 02 September 2002 15:35
	To: Elliotte Rusty Harold; xml-dev@lists.xml.org
	Subject: RE: [xml-dev] xml schema
	>Many statements in his article indicate his bias[0]. What more do you want, a point by point rebuttal in a counter-
	>article on XML.com?
	>What is ridiculous is the fact that this is actually being disussed like the article is based on facts and research
	>instead of being mostly smoke and mirrors. Like I said earlier, I assume this is because the people who are taking the
	>article at face value aren't knowledgeable in the subject area and are going off of name recognition of the author.
	If what you say is the case, then you would certainly be doing the readership of XML.com a great service by producing such an article. So maybe you should think seriously about it if you have the time.
	All the best
	Mark Seaborne


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