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Re: XPath/XSLT 2.0 concerns (off topic)

• To: Deborah Aleyne Lapeyre <dalapeyre@m...>
• Subject: Re: XPath/XSLT 2.0 concerns (off topic)
• From: ht@c... (Henry S. Thompson)
• Date: 03 Oct 2002 09:02:11 +0100
• Cc: <xml-dev@l...>
• In-reply-to: <a05100309b9c1473881ba@[192.168.1.113]>
• References: <001101c26a44$1be0e880$6401a8c0@pcukmka><19534340120.20021002203152@j...><a05100309b9c1473881ba@[192.168.1.113]>
• Sender: ht@i...
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Deborah Aleyne Lapeyre <dalapeyre@m...> writes:

> Jeni said:
> 
> >Actually I think we can break this pattern down into two classes:
> >
> >   1. grouping elements based on their *content* -- in other words, the
> >      *type* hierarchy
> >
> >   2. grouping elements based on their *context* -- in other words, the
>       *substitution group* hierarchy
> 
> >  The current focus in XPath/XQuery is very much on 1 rather than 2.
> 
> Yes, but that has been one of my major objections to W3C XML Schema
> all along. W3C only gave us #1 really and some very crude mechanisms
> for #2. The XPath/XQuery folk are heading in the same direction.

I'd be very grateful for examples of where substitution groups don't
enable the reconstruction of parameter entity usage a la Maler and El
Andaloussi.  I know about the multiple inheritance problem here, and
we're looking at that as a possible requirement for XML Schema 1.1,
but even here clear examples of what you can't do without that would
be helpful in arguing the case.

ht
-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2002, 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@c...
		     URL: http://www.ltg.ed.ac.uk/~ht/
 [mail really from me _always_ has this .sig -- mail without it is forged spam]

• References:
  • RE: XPath/XSLT 2.0 concerns
    • From: "Michael Kay" <michael.h.kay@n...>
  • Re: XPath/XSLT 2.0 concerns
    • From: Jeni Tennison <jeni@j...>
  • Re: XPath/XSLT 2.0 concerns (off topic)
    • From: Deborah Aleyne Lapeyre <dalapeyre@m...>

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