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   Re: Schema for XSLT (concerns mixed content, content attribute)

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  • From: ht@cogsci.ed.ac.uk (Henry S. Thompson)
  • To: "Box, Don" <dbox@develop.com>
  • Date: 20 Apr 2000 17:25:06 +0100

"Box, Don" <dbox@develop.com> writes:

> Yeah, I thought about alternative ways to model that. One way would have
> been to use a named model group (that was my first pass btw). The problem is
> that for mixed content, you can't use sequence constraints. This is a
> problem with older technologies as well.

Yes you can -- the whole point of making 'mixed' orthogonal to the
content model is that e.g.

  <xs:complexType name='haystack' content='mixed'>
     <xs:element name='thread'/>
     <xs:element name='needle'/>

schema-validates _only_ <haystack> elements with exactly one <thread>
and one <needle> daughters, _in that order_.

Yet another reason to think again about the default <choice> wrapper
when you simply say

  <xs:complexType content='mixed'>
   <xs:element .../>
   . . .

  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2001, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/

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