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Can somebody give me exact links for specifications of the following:


Thanks in advance..
----- Original Message -----
From: <Tony.Coates@reuters.com>
To: <xml-dev@lists.xml.org>
Sent: Thursday, September 06, 2001 3:39 AM
Subject: RE: XML Schemas: Best Practices ? Versioning

> On 05/09/2001 19:56:47 Michael Brennan wrote:
> >I  don't think 3 and 4 are reliable. #3 makes the incorrect assumption
> >"instance documents give the name and location of the associated schema".
> >is undoubtedly the prevalent case, but as sound entity resolution
> >gain more widespread use, I'm inclined to believe there will be less and
> >of  this. You cannot assume a consuming application is relying upon the
> >"schemaLocation" attribute (or even paying any attention to it). I think
> >changing the target namespace is the only reliable approach.
> Once again, too much emphasis on the belief that everything should work
even if there is no "schemaLocation" given.  I really believe that taking
this view, which does not seem to be the view of the W3C people I've talked
to, will just lead to more complication than is necessary.
> >In  spite of the complications it poses, I think #2 is the best practice.
> >True,  instance documents and schemas that include the relevant schema
> >change to  reference the new version, but that is often a good thing. You
> >want those  references to indiscriminately change to reference a new
> >without  assurance that there are no incompatibility issues. Indeed, by
> >changing the  namespace, you can permit concurrent use of different
versions of
> >a schema,  allowing users time to migrate to the new version as
> >is  assured.
> The same is true if you insist on a versioned "schemaLocation".
>      Cheers,
>           Tony.
> ========
> Anthony B. Coates
> (1) Content Distribution Architect - Project Gazelle
> (2) Leader of XML Architecture & Design - Chief Technology Office
> Reuters Plc, London.
> Tony.Coates@reuters.com
> ========
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