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Re: ISSUE-24: Proposal for dealing with case-insensitive terms in the XHTML vocabulary

From: Shane McCarron <shane@aptest.com>
Date: Thu, 15 Jul 2010 11:08:27 -0500
Message-ID: <4C3F327B.4030204@aptest.com>
To: RDFa WG <public-rdfa-wg@w3.org>
We had a good discussion on this issue today - I am sure the minutes 
will be out shortly.  Unfortunately, this issue dovetails with many 
other related issues, so it is not completely straightforward to 
resolve.  Worse yet, I now feel my proposal below was too simplistic - 
we need to view this in the context of a collection of issues:

    * case sensitivity of values in rel/rev
    * Terms enumerated in XHTML+RDFa
    * Terms defined in w3.org/1999/xhtml/vocab
    * LinkType values and their registration (IETF, WhatWG, HTML5)
    * Default vocabulary for Core, XHTML+RDFa, HTML+RDFa
    * Default profile for XHTML+RDFa and HTML+RDFa
    * Caching of profiles
    * Hardcoding of profiles and their evolution

Consequently, I have withdrawn the proposal below.  I am going to spend 
some time trying to address all of the above in a single proposal so we 
can hopefully resolve them all at once.  Obviously, this will be more 
difficult.  But resolving these issues piecemeal is bound to lead to 
confusion and an incomplete solution.

Thanks in advance for your patience.

On 7/13/2010 5:01 PM, Shane McCarron wrote:
> In general, I feel that terms should always be treated as case 
> sensitive.  However, I agree that for backward compatibility reasons, 
> the terms defined in *OUR* XHTML vocabulary, as extended by terms that 
> are defined in HTML5, should be mapped to lower case when processing.
> I do not think this is an RDFa Core issue.  Rather, I think that in 
> RDFa Core we should say:
>    TERMs, CURIEs, and URIs are all case sensitive.  Host Languages may
>    place further processing requirements on TERMs (e.g., requiring they
>    be mapped to lower case).
> In XHTML+RDFa 1.1 we should say:
>    When referencing TERMs in the vocabulary at
>    http://www.w3.org/1999/xhtml/vocab, TERMs must be mapped to lower 
> case.
> I imagine we would need to say something similar in HTML+RDFa.

Shane P. McCarron                          Phone: +1 763 786-8160 x120
Managing Director                            Fax: +1 763 786-8180
ApTest Minnesota                            Inet: shane@aptest.com
Received on Thursday, 15 July 2010 16:09:03 UTC

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