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Re: role="presentation" on an image

From: David Bolter <david.bolter@gmail.com>
Date: Mon, 23 Aug 2010 10:42:55 -0400
Message-ID: <4C7288EF.3050405@gmail.com>
To: Steven Faulkner <faulkner.steve@gmail.com>
CC: "Richards, Jan" <jrichards@ocad.ca>, W3C WAI-XTECH <wai-xtech@w3.org>
  Choose the closest possible role that isn't "presentation" ;)

cheers,
David

On 23/08/10 10:38 AM, Steven Faulkner wrote:
> Hi Jan,
> I am thinking about situations where an image contains information 
> that needs to be conveyed, but the fact that it is an image is not 
> relevant. How can that be conveyed?
> regards
> stevef
>
> On 23 August 2010 15:35, Richards, Jan <jrichards@ocad.ca 
> <mailto:jrichards@ocad.ca>> wrote:
>
>     Hi Steve,
>
>     The issue is really what to do with the conflicting semantics.
>     Role=Presentation implies the image is decorative and can be
>     ignored, while alt=”home page” implies the image is functional and
>     should have alt text.
>
>     I suggest a heuristic that errs on the side of functional and
>     disregards the role=Presentation if alt (or labelled-by or
>     described-by) is present.
>
>     Cheers,
>
>     Jan
>
>     -- 
>
>     (Mr) Jan Richards, M.Sc.
>
>     jrichards@ocad.ca <mailto:jrichards@ocad.ca> | 416-977-6000 ext.
>     3957 | fax: 416-977-9844
>
>     Inclusive Design Research Centre (IDRC) | http://inclusivedesign.ca/
>
>     Faculty of Design | OCAD University
>
>     *From:* wai-xtech-request@w3.org <mailto:wai-xtech-request@w3.org>
>     [mailto:wai-xtech-request@w3.org
>     <mailto:wai-xtech-request@w3.org>] *On Behalf Of *Steven Faulkner
>     *Sent:* August 23, 2010 10:28 AM
>     *To:* David Bolter
>     *Cc:* W3C WAI-XTECH
>     *Subject:* Re: role="presentation" on an image
>
>     hi dave,
>
>     >role="label"
>
>     there is no ARIA role="label"
>
>     there is an aria-label property.
>
>     regards
>
>     steve
>
>     On 23 August 2010 15:23, David Bolter <david.bolter@gmail.com
>     <mailto:david.bolter@gmail.com>> wrote:
>
>     Hi Steve,
>
>     What about putting role="label" on the image, and adding an
>     aria-labelledby relation?
>
>     cheers,
>     D
>
>
>
>     On 23/08/10 7:59 AM, Steven Faulkner wrote:
>
>     Hi all,
>
>     If an image has a role=presentation and a non empty alt, shouldn't
>     the alt text be passed to AT?
>
>     example:
>
>     <a href="home.html"><img src="home.gif" alt="home page"></a>
>
>     currently this typically results in a screen reader announcing:
>
>     "link graphic home page"
>
>     when the presenece of the role information seems less than useful
>     in context.
>
>     if role="presentation" allaowed the text "content" of the image
>     object to be passed to AT then
>
>     <a href="home.html"><img src="home.gif" alt="home page"
>     role="presentation"></a>
>
>     would result in the follwoing being announced:
>
>     "link home page"
>
>     currently this does not work as adding role="presentation" removes
>     the image form the browsers accessible tree.
>
>     -- 
>     with regards
>
>     Steve Faulkner
>     Technical Director - TPG Europe
>     Director - Web Accessibility Tools Consortium
>
>     www.paciellogroup.com <http://www.paciellogroup.com/> |
>     www.wat-c.org <http://www.wat-c.org/>
>     Web Accessibility Toolbar -
>     http://www.paciellogroup.com/resources/wat-ie-about.html
>
>
>
>
>     -- 
>     with regards
>
>     Steve Faulkner
>     Technical Director - TPG Europe
>     Director - Web Accessibility Tools Consortium
>
>     www.paciellogroup.com <http://www.paciellogroup.com/> |
>     www.wat-c.org <http://www.wat-c.org/>
>     Web Accessibility Toolbar -
>     http://www.paciellogroup.com/resources/wat-ie-about.html
>
>
>
>
> -- 
> with regards
>
> Steve Faulkner
> Technical Director - TPG Europe
> Director - Web Accessibility Tools Consortium
>
> www.paciellogroup.com <http://www.paciellogroup.com> | www.wat-c.org 
> <http://www.wat-c.org>
> Web Accessibility Toolbar - 
> http://www.paciellogroup.com/resources/wat-ie-about.html
Received on Monday, 23 August 2010 14:43:31 GMT

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