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Re: fear of "invisible metadata" [was Re: retention of summary attribute for TABLE element]

From: Charles McCathieNevile <chaals@opera.com>
Date: Fri, 22 Jun 2007 02:09:54 +0200
To: "Maurice Carey" <maurice@thymeonline.com>, "HTML Working Group" <public-html@w3.org>
Message-ID: <op.tuaqqseuwxe0ny@widsith.lan>

On Thu, 21 Jun 2007 22:49:45 +0200, Maurice Carey  
<maurice@thymeonline.com> wrote:

> On 6/20/07 7:47 AM, "Ben Boyle" <benjamins.boyle@gmail.com> wrote:
>
>> <figure>
>   <legend>...</legend>
>   <img
>> src="http://www.webaim.org/techniques/images/media/graph.jpg">
>     <table>
...
>> </table>
>   </img>
> <figure>
>
>
> I like your fallback idea but I personally would want to see both the  
> graph
> image and the data table. I'd imagine a fallback being better used with a
> flash based graph that falls back to the image + table.
> ....maybe with an id on the caption of the table that is used in the
> longdesc attribute of the image?

That would be one obvious way to do it. The User Agent Accessibility  
Guidelines (the document that talks about things browsers need to do to be  
more accessible) says that you should be able to choose between what it  
calls conditional content - fallbacks, alternatives, etc. at  
http://www.w3.org/TR/UAAG/guidelines.html#tech-conditional-content (just  
before it says that users should be able to ensure content ISN'T rendered,  
because that can be important too...).

Implementation of some of this in browsers isn't so hot :( It doesn't mean  
generally that it is a bad idea, just that it hasn't happened yet. Some of  
the important features for navigating the web were not added to screen  
readers in the first decade of the web...

Cheers

Chaals

-- 
   Charles McCathieNevile, Opera Software: Standards Group
   hablo español  -  je parle français  -  jeg lærer norsk
chaals@opera.com    Catch up: Speed Dial   http://opera.com
Received on Friday, 22 June 2007 00:10:09 GMT

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