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Re: Invalid XHTML Re: Another test suggesting change in the spec

From: Chimezie Ogbuji <ogbujic@ccf.org>
Date: Mon, 23 Apr 2007 12:00:59 -0400
To: "Dan Connolly" <connolly@w3.org>
cc: "Jeremy Carroll" <jjc@hpl.hp.com>, "GRDDL Working Group" <public-grddl-wg@w3.org>
Message-ID: <1177344059.5534.27.camel@otherland>

On Mon, 2007-04-23 at 10:48 -0500, Dan Connolly wrote:
> On Mon, 2007-04-23 at 14:13 +0100, Jeremy Carroll wrote:
> > 
> > A modification to my previous suggested text
> > 
> > [[
> > While these mechanisms are intended primarily
> > for valid XHTML family documents, they also
> > may be used with invalid XHTML family documents,
> > particularly those that would be valid
> > upon deletion of all namespace qualified attributes.
> > ]]
> What do you mean by "invalid XHTML family documents"?
> There is no such thing, as far as I know. All the
> current XHTML specs use DTDs to say what an XHTML document
> is, I think.

I don't want to answer for Jeremy, but I'm assuming he meant well-formed
XML documents (*not* tag soup) which differ from 'valid' XHTML (per DTD)
primarily via the use of namespace declarations (the most common case). 

I think it would be a *serious* mistake for GRDDL to exclude this family
of documents (even implicitly) or to allow an interpretation that
suggests such an exclusion.  This is mostly a matter of clarification
IMHO as (by virtue of the normative sections being declared in XPath)
this is clearly not the case (however, the use of the 'valid' XHTML
qualifier seems counter-intuitive).  

I.e., a GRDDL-aware agent which comes across XHTML which is invalid WRT
to one of the 'sanctioned' DTDs will still compute GRDDL results.  So,
'validity' would seem to be of no consequence.

John's suggestion [1] about an interpretation of validity that permits
this is very relevant to this point.


Chimezie Ogbuji
Lead Systems Analyst
Thoracic and Cardiovascular Surgery
Cleveland Clinic Foundation
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Received on Monday, 23 April 2007 16:01:12 UTC

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