W3C home > Mailing lists > Public > xml-uri@w3.org > May 2000

schemas and namespaces

From: Simon St.Laurent <simonstl@simonstl.com>
Date: Fri, 19 May 2000 12:03:38 -0400
Message-Id: <200005191601.MAA14010@hesketh.net>
To: "David E. Cleary" <davec@progress.com>, <xml-dev@xml.org>, <xml-uri@w3.org>
At 11:53 AM 5/19/00 -0400, David E. Cleary wrote:
>The Schema WG is not advocating that schemas be pointed to by namespace
>URIs. That is what the SchemaLocation attribute is for. Do not confuse the
>opinions of some as the consensus of the Schema WG.

I'm glad to hear that there is no consensus.

>> This activity is a large part of what makes the relative URI discussion so
>> ugly, because the results of that are intertwined with the
>> NSURI-pointing-to-schemas issue.
>
>That is a red herring IMHO. The issue is that Namespace, XPath, and DOM recs
>are inconsistent with their use of NS URI equivalence. There is currently no
>rec stating what an application can or can't do with a namespace URI.

It may be a red herring technically, but it seems to be a key driver behind
the discussion - in particular regarding why relative namespace URIs might
be useful.

>Decide what rec needs to be changed and do it is such a way that doesn't
>break currently conforming documents. Leave the packaging and dereferencing
>out of it for now.

I'd be happy with that, provided the other issues are (finally) taken up.

>Since there is currently no specification as to what resides at the endpoint
>of a NS URI, shouldn't it be up to the owner of that URI to decide what is
>there? The fact is that in many real applications, schemas will not
>retrieved over the web to process an instance document. They will be stored
>and retrieved locally based on the NS URI. But again, this has nothing to do
>with solving the problem at hand.

Yes, but the W3C is no ordinary owner of a URI - they're a body defining
said specs, and it's clear from discussion that this is not an arbitrary
"we can do what we like" decision.

Simon St.Laurent
XML Elements of Style / XML: A Primer, 2nd Ed.
Building XML Applications
Inside XML DTDs: Scientific and Technical
Cookies / Sharing Bandwidth
http://www.simonstl.com
Received on Friday, 19 May 2000 12:01:38 UTC

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