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Re: CSS Namespaces: Need multiple namespaces!

From: Chris Lilley <chris@w3.org>
Date: Thu, 30 Sep 1999 01:31:39 +0200
Message-ID: <37F2A15B.31CEA7B2@w3.org>
To: www-style <www-style@w3.org>
CC: "L. David Baron" <dbaron@fas.harvard.edu>, peterl@netscape.com

Ian Hickson wrote:

> I agree; but as devil's advocate I suppose one could argue that they
> are not the same vocabulary. One may be a subset of another, but they
> are not actually the same. For example, one allows <font> inside <p>,
> whereas another does not.

But the meaning of each element is the same in each of the three DTDs,
so they should use the same namespace.

Of course, if all the presentationasl stuff was put into a separate
namespace, so that XHTML strict used the XHTML namespace and XHTML
transitional used the XHTML and XHTML-P namespaces, well that would be

> When|If Schemas are pointed to by namespace URIs (as suggested in
> various packaging ideas recently), then namespaces will fill basically
> the same role as PUBLIC/SYSTEM FPIs/DTDs, and so n (where here n=3)
> namespaces will become a necessity.

So in each DTD/XSchema that uses a given vocabiulary set, it has a
different namespace identifier, then ther eis no ability to recognise
different namespaces. So you have made namespace declarations be an
exact analogue of doctype declarations, which already exist, and removed
the ability to identify which vocabularies are being combined in a given

Received on Wednesday, 29 September 1999 19:31:47 UTC

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