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Re: Schema Namespace name, schemaLocation, and Schema V ersi

• To: Dare Obasanjo <kpako@y...>
• Subject: Re: Schema Namespace name, schemaLocation, and Schema V ersioning
• From: ht@c... (Henry S. Thompson)
• Date: 18 Jul 2002 17:45:37 +0100
• Cc: David Carlisle <davidc@n...>, jeni@j..., xml-dev@l...
• In-reply-to: <20020718161054.88979.qmail@w...>
• References: <20020718161054.88979.qmail@w...>
• User-agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.4 (Honest Recruiter)

Dare Obasanjo <kpako@y...> writes:

> --- David Carlisle <davidc@n...> wrote:
> > 
> 
> >
> http://my.domain.example.org/product/[year/month][/area]
> > 
> > 
> > No! the (rather regretable) dated W3C namespace URI
> > are explictly _not_
> > for versioning, it's just that the W3C uses a dated
> > format for any URI
> > that they intend to be permanent.
> >
> > so for example 
> > http://www.w3.org/1998/Math/MathML
> > is the namespace for MathML 1, 1.01 and 2.0 (and
> > hopefully all future
> > versions of MathML)
> > 
> > similarly
> > http://www.w3.org/1999/XSL/Transform
> > is the namespace for XSLT 1 and for the XSLT 2
> > proposal.
> 
> I hope this isn't official W3C policy because it is
> very poorly thought out.

I don't _think_ it's policy -- I believe backward incompatible changes
should involve a namespace change.

> We at Microsoft are already having problems with the fact that RECs
> like W3C XML Schema add backwards incompatible changes in errata
> does breaking our customer's previously working schemata when they
> get a patch or upgrade for no fault of their own or ours.

As far as the Schema WG is concerned, we've tried _very_ hard not to
do that, and your representatives on the WG have not identified any
cases of this happening as far as I know -- please let the WG know
ASAP which errata rendered previously valid schemas or instances
invalid!

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]

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    • From: Dare Obasanjo <kpako@y...>

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