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[A11y] requiring alt Re: fear of "invisible metadata"

From: Charles McCathieNevile <chaals@opera.com>
Date: Tue, 19 Jun 2007 03:44:31 +0200
To: "Maciej Stachowiak" <mjs@apple.com>, "Gregory J. Rosmaita" <oedipus@hicom.net>
Cc: "Lachlan Hunt" <lachlan.hunt@lachy.id.au>, public-html@w3.org
Message-ID: <op.tt5a4hkvwxe0ny@pc052.coreteam.oslo.opera.com>

On Tue, 19 Jun 2007 03:08:53 +0200, Maciej Stachowiak <mjs@apple.com>  

> ALT should not be required either. It leads to pointless alt="" on  
> images that have no reasonable text equivalent, just to satisfy  
> conformance checkers. And that is actively harmful, because AT can't  
> tell the difference between a semantically null image and a semantically  
> meaningful image with no text alternative.

So if it were not required, you would have alt="" on things that need no  
text, alt="useful information" on things that are useful information, and  
nothing on poorly authored content which may or may not need an alt  

The approach we took in ATAG 1 was to require noting that the absence of  
alt is an error, but also require that no default be generated, which is  
in line with this thinking...



   Charles McCathieNevile, Opera Software: Standards Group
   hablo español  -  je parle français  -  jeg lærer norsk
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Received on Tuesday, 19 June 2007 01:45:32 UTC

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