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----- Original Message ----- From: "Tim Bray" <tbray@t...> To: <xml-dev@l...> Sent: Saturday, January 19, 2002 10:48 PM Subject: Re: Re: Flexible Schemas (was RE: The task to be solved by RDDL) > At 01:55 PM 19/01/02 +0100, Nicolas Lehuen wrote: > >As I've said three of four times now, show me the algorithm that will find > >the URL of the RDDL document for this document : http://www.rddl.org/. This > >is a FONDAMENTAL problem with RDDL. > > Sure: > 1. Ascertain the namespace of the root element > 2. Dereference that namespace > > In the case of that document, the namespace of the root element is > http://www.w3.org/1999/xhtml. Dereferencing this reveals that > there is no RDDL posted for XHTML. What a pity. But the document is not an XHTML document !!! It is a RDDL document ! The namespace of the root element has nothing to do with the document type. What a pity, RDDL cannot be used to 'recognize' itself ! > But in general your question is slightly mis-phrased. RDDL isn't > designed to be associated with a *document* but with a *namespace* > which in practical terms means an element or attribute. Thus when > I read through the document you reference, eventually I come to > an element that's in the namespace http://www.rddl.org/ - this > namespace is lucky enough to have a RDDL directory available. > > As many people have pointed out, modern XML resources can > have lots of different namespaces. RDDL is designed to help > in the case where you don't know about one or more of them. -Tim OK so now I know that we are perfectly in phase on the purpose of RDDL. So please, please, could you mention in the RDDL specs that RDDL should not be used as a way to find schemas for a document, because namespaces have nothing to do with document types ? Could we just agree on this, and then try to move on resolving the bigger problem of associating meta-data to document types ? Best regards, Nicolas
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