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Re: Expanding longdesc use

From: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
Date: Wed, 14 Mar 2012 05:36:30 +0100
To: Laura Carlson <laura.lee.carlson@gmail.com>
Cc: Silvia Pfeiffer <silviapfeiffer1@gmail.com>, HTML Accessibility Task Force <public-html-a11y@w3.org>, W3C WAI-XTECH <wai-xtech@w3.org>
Message-ID: <20120314053630315032.422480b6@xn--mlform-iua.no>
Laura Carlson, Tue, 13 Mar 2012 15:33:14 -0500:
>> want it used for more than just <img>.
> No reason why longdesc could not do that. John has longdesc
> incorporated into a couple of his media change proposals.

Could we expand your CP - now - to cover any element of role=img? You 
should have all image use cases for role=img covered already. Apart 
from <iframe>, which has some support,  I can only think of lack of 
implementation as reason for not permitting this.  Such a move would 
e.g. make the following conforming, and thus take away some of the 
objection to the fact that e.g. embedded <svg> cannot use longdesc:

   <pre    role=img longdesc >ASCII-art</pre>
   <iframe role=img longdesc ></iframe>
   <div    role=img longdesc ><svg/></div>

Personally, I find longdesc on <table> a much longer shot. But if you 
agree to the above, then we could perhaps also consider longdesc on 
elements which
* have explicit role=img, role=application or role=document;
* or - even without explicit role declartion - if the element
  is prohibited from taking any other role than 'img',
  'application' or 'document'.

This would actually allow longdesc on <table>, if one of the above 
roles is explicitly declared. And it would allow longdesc on <audio>, 
<video> and <iframe> even without the role being declared, because 
these elements are are limited to  role=img/document/application.

Please let me hear your opinions.
Leif Halvard Silli
Received on Wednesday, 14 March 2012 04:37:07 UTC

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