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Re: longdesc URLs and RDFa

From: Ivan Herman <ivan@w3.org>
Date: Sun, 15 Aug 2010 07:38:50 +0200
Cc: Shane McCarron <shane@aptest.com>, public-rdfa-wg@w3.org
Message-Id: <CF9B38E6-B486-4641-85D7-66D3A762B166@w3.org>
To: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
Leif,

if you formally want @longdesc and @cite to be interpreted in RDFa, I think for the sake of the discussion in the RDFa WG you should really give a clear use case for both attributes' usage in terms of RDF triples. The mail of Shane seems to suggest that this would not really be a solution for assistive technologies, for example.

B.t.w., you referred to my reference to object. The reason I referred to object is as follows. There are a number of attributes in HTML4 and HTML5 that might be reasonably interpreted in RDFa beyond @rel, @rev, @href. The original RDFa design decided to give a specific interpretation (essentially like @href) to @src to give a proper treatment to <img> (Luckily, the @src attribute covers the requirement of HTML5's <video> and <audio>.) With the same logic, the @data attribute of <object> could be interpreted a similar way but it isn't; I do not remember why it was decided not to do that, but I suspect the reason was to keep the language more succinct.

That is why I would like to have a very clear use case both for @longdesc and @cite. And also why you do not add @alt to this list, although I think it would belong to the same family, so to say.

Thanks

Ivan 


On Aug 14, 2010, at 18:37 , Leif Halvard Silli wrote:

> Shane McCarron, Sat, 14 Aug 2010 11:00:53 -0500:
>> Thanks for the clarification.  And yes, I agree that (X)HTML+RDFa 
>> should support @longdesc and @cite.  We had planned to add support 
>> for things like these in conjunction with XHTML 2 development. 
> 
> I'm not surprised to hear that you had thought of that. :-)
> 
>> Obviously that has been overcome by events :-(
>> 
>> Can we consider this a formal request for the addition of these 
>> features?
> 
> Yes, please. I have hereby - via this and the preceding messages - 
> formally asked that you add support for @cite and @longdesc to 
> XHTML+RDFa - and in as many other RDFa implementations and specs that 
> you care for, on the basis that these are anchor link like attributes 
> etc. :-) 
> 
>> I am sure Manu would be happy to add it to the issues list 
>> and debate it in the group in the coming weeks.
> 
> Great. 
> 
> Btw, tidbit: my day-to-day Web browser, iCab, both support @longdesc 
> functionally and also - conceptionally -lists any longdesc link amongst 
> all others links in its link list tool. (I must check whether it also 
> lists @cite links in the link list tool ...)
> -- 
> leif halvard silli


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Ivan Herman, W3C Semantic Web Activity Lead
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Received on Sunday, 15 August 2010 05:37:28 GMT

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