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Re: longdesc vs D-link query

From: Carlos Velasco-Nunez <Carlos.Velasco-Nunez@gmd.de>
Date: Wed, 11 Apr 2001 12:17:15 +0200
Message-ID: <3AD42F2B.BD7CD0C2@gmd.de>
To: Andrew_Arch@visionaustralia.org.au
Cc: w3c-wai-eo@w3.org
Hi Andrew,

We made a test with different user agents and OS's two months ago in our
facilities: no user agent supports longdesc so far (we did not check the
latest version of Amaya), so don't throw away your D-links <smile> yet.

Carlos

Andrew_Arch@visionaustralia.org.au wrote:
> 
> Dear All,
> 
> In our workshops we have still been promoting the use of the "D" link for
> complex graphics explanations, however when I recently checked back to the
> Techniques document: http://www.w3.org/TR/WCAG10-HTML-TECHS/#long-descriptions
> 
> ====================
> 7.2.1 Invisible d-links
> 
>        Note. Invisible d-links are deprecated in favor of the "longdesc"
> attribute.
> 
>        An invisible d-link is a small (1-pixel) or transparent image whose "alt"
> attribute value is "D-link" or "D" and is
>        part of the content of an A element. Like other d-links, it refers to a
> text equivalent of the associated image. Like
>        other links, users can tab to it. Invisible d-links thus provide a
> (temporary) solution for designers who wish to
>        avoid visible d-links for stylistic reasons.
> ====================
> 
> It appears that visible "D" links are still acceptable, but the invisible "D"
> link is not. (In which case, can anyone point me to a definitive list of "user
> agents" (or versions) that do/don't support "longdesc"?) I am then curious as to
> why visible "D" links are recommended as a technique but not invisible ones - a
> screen-reader doesn't differentiate!
> 

-- 
Dr Carlos A Velasco
mailto:Carlos.Velasco-Nunez@gmd.de    http://access.gmd.de/
GMD - German National Research Center for Information Technology
  Institute for Applied Information Technology (FIT.HEB)
  Schloss Birlinghoven, D53757 Sankt Augustin (Germany)
  Tel: +49-2241-142609 Fax: +49-2241-142065
Received on Wednesday, 11 April 2001 06:17:21 UTC

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