W3C home > Mailing lists > Public > public-html-a11y@w3.org > March 2011

Re: DIAGRAM project and image descriptions

From: Charles McCathieNevile <chaals@opera.com>
Date: Fri, 18 Mar 2011 06:43:46 +0100
Cc: "Laura Carlson" <laura.lee.carlson@gmail.com>, "Geoff Freed" <geoff_freed@wgbh.org>, "public-html@w3.org" <public-html@w3.org>, "HTML Accessibility Task Force" <public-html-a11y@w3.org>
To: "Jonas Sicking" <jonas@sicking.cc>, "Leif Halvard Silli" <xn--mlform-iua@xn--mlform-iua.no>
Message-ID: <op.vsix68dtwxe0ny@widsith.local>
On Wed, 16 Mar 2011 00:51:12 +0100, Leif Halvard Silli
<xn--mlform-iua@målform.no> wrote:

> Jonas Sicking, Tue, 15 Mar 2011 14:13:54 -0700:
>> As far as I can see aria-describedby addresses this use case. I
>> believe ARIA is no explicitly supported by HTML5 drafts.
>
> Now I am surprised. Care to explain? See my concrete questions below.
>
>>> On 2/25/11, Geoff Freed wrote:
>
>>>> [ ... ] bear in mind that long descriptions are
>>>> typically produced after the original content has been published.
>
> Jonas, when produced after the original, how would you use
> aria-describdby?

Same as longdesc. By editing the page unless you put a placeholder there
that temporarily isn't helpful. In other words, I don't think that is an
issue for picking between the two.

> [...]
>>>> Furthermore, those hosted descriptions will be living documents which
>>>> may need to be improved upon in a collaborative and moderated
>>>> fashion. [...]
>
> Jonas, how can aria-describedby address the use case of a description
> that lives on another page?

It can't. This is the major piece that longdesc can do which
aria-describedBy doesn't.

cheers

Chaals

-- 
Charles McCathieNevile  Opera Software, Standards Group
       je parle français -- hablo español -- jeg lærer norsk
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Received on Friday, 18 March 2011 05:45:31 GMT

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