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Re: Please declare in GRDDL spec that XML validation is not required

From: Dan Connolly <connolly@w3.org>
Date: Tue, 06 Mar 2007 22:41:09 -0500
Message-ID: <45EE3455.9070300@w3.org>
To: Dave Beckett <dave@dajobe.org>
Cc: Harry Halpin <hhalpin@ibiblio.org>, public-grddl-comments@w3.org
Dave Beckett wrote:
> Harry Halpin wrote:
>   
>> Actually, as the author of the offending web-page (sorry, it was hacked
>> together by hand in my attempt to learn Embedded RDF - I'll fix it up
>> and package it up with the VCard/RDF note after we get GRDDL to Last
>> Call...), I think the answer is that Raptor is right and GRDDL.py is off.
>>     
>
> OK.  I have restored raptor to validating.
>   
I wouldn't do that if I were you, Dave.

I'm reading/writing in a bit of a rush, so I might have missed 
something. But I don't think so...
>   
>> The reason is that while DanC correctly notes we underspecified lots of
>> things, we did not underspecify that a GRDDL transforms XPath nodes to
>> graphs: " If an information resource([WEBARCH]
>> <http://www.w3.org/2004/01/rdxh/spec#WEBARCH>, section 2.2) IR is
>> represented by an XML document with an XPath root node R, and R has a
>> GRDDL transformation with a transformation property TP, and TP applied
>> to R gives an RDF Graph G, then G is a GRDDL result of IR." I believe in
>> order to get XPath nodes, once must get an XPath data model: "XPath
>> operates on the abstract, logical structure of an XML document, rather
>> than its surface syntax. This logical structure, known as the *data
>> model*, is defined in [XQuery/XPath Data Model (XDM)]
>> <http://www.w3.org/TR/xpath20/#datamodel>.]" [1]
>>
>> Therefore, if something is not a valid XML document, and Raptor claims
>> that VCard Table is not, then it should not produce any GRDDL results.
>>     

Huh? that doesn't follow. An XML document doesn't have to be valid in 
order to give
rise to an XPath data model.


-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/
Received on Wednesday, 7 March 2007 03:41:14 UTC

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