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RE: /WD-xpath-datamodel-20030502/

From: Michael Rys <mrys@microsoft.com>
Date: Tue, 13 May 2003 22:26:01 -0700
Message-ID: <5C39F806F9939046B4B1AFE652500A3A0509B3A9@RED-MSG-10.redmond.corp.microsoft.com>
To: <David.Pawson@rnib.org.uk>, <public-qt-comments@w3.org>

XPath is a language that is being embedded in different environments
(one of them being XSLT).

So XPath itself should not have to extend the data model because many
environments that use XPath may not need this information. By saying it
is out-of-scope of the data model document, another spec can define it
to be in its scope (and I assume--but do not know--that the XSLT spec
will do so).

In this case, they are not non-conformant, but they add a constraint on
a behaviour that was open for using environments to specify.

Best regards
Michael

> -----Original Message-----
> From: David.Pawson@rnib.org.uk [mailto:David.Pawson@rnib.org.uk]
> Sent: Tuesday, May 13, 2003 1:53 AM
> To: public-qt-comments@w3.org
> Subject: RE: /WD-xpath-datamodel-20030502/
> 
> 
> Michael Kay wrote:
> > > From section 5.
> > > quote.
> > > The value space of the atomic values is the union of the
> > > value spaces of the nineteen primitive XML Schema types. unquote.
> > >
> > > Does this imply that no types (or at least atomic types) from
> > > any other source are valid within this data model?
> > >
> > > Is this lockout for anything other than XML schema types or
> > > some direct derivation?
> > >
> > > Or more specifically, lockin to XML schema types?
> > >
> >
> > We have added statements in the XPath and XSLT specifications
> > saying that
> > the set of types may be extended by implementors, I think the
> > Data Model
> > document probably needs to say something to reflect this.
> 
> Then does that mean that xslt and xpath need to extend the datamodel,
> and are hence non-compliant to a data model built for them,
> due to that extension?
> 
> regards DaveP
> 
> 
> *** snip here ***
> 
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Received on Wednesday, 14 May 2003 01:26:11 GMT

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