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Re: Xpath 1.0 and 2.0

From: David Carlisle <davidc@nag.co.uk>
Date: Fri, 5 Nov 2004 16:00:45 GMT
Message-Id: <200411051600.QAA21174@penguin.nag.co.uk>
To: mhk@mhk.me.uk
CC: jonathan.robie@datadirect.com, www-xpath-comments@w3.org

Michael is correct to state that W3C policy essentially prohibits
changing existing documents, however it is possible to arrange that
documents contain forward pointers to possible future recs.

The MathML 2 "2nd edition" REC was one of the first to get to a 2nd
edition of a 2nd release, and after some confusion during working draft
stage as to what the "latest version" links should point to we finally
came to the following scheme in consultation with the W3C web team.

the document header has the links:

This version:
Latest MathML 2 version:
Latest MathML Recommendation:

Currently all of those point to the same thing however if we bring out
mathml2 3rd edition, the second and third ones one will redirect to the
new spec. if we bring out a mathml 3 then the second one will not change
but the third one would then redirect to the mathml 3 spec.

so although the actual visible page at
will never change it will always have links to the latest versions of

For this to work for Xpath and friends TR space would need to allocate
"version independent" URIs cf
in addition to
version specific URIs
and of course dated document specific URIs

You can only do this for new documents though (MathML 1 doesn't have a
link to MathML 2 for example) so such a scheme could only apply for
xpath2 and up not xpath1 as the original poster requested.

Note I am _not_ a member of any WG connetcted with XPath/XSLT/Xquery

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Received on Friday, 5 November 2004 16:01:04 UTC

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