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Re: Clarification of WCAG intent and meaning of techniques [Re: WCAG considering amending F65 to NOT fail missing ALT text if title or aria-label is present]

From: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
Date: Thu, 28 Nov 2013 14:03:00 +0100
To: Steve Faulkner <faulkner.steve@gmail.com>
Cc: "Schnabel, Stefan" <stefan.schnabel@sap.com>, Michael Cooper <cooper@w3.org>, David MacDonald <david100@sympatico.ca>, Janina Sajka <janina@rednote.net>, HTML Accessibility Task Force <public-html-a11y@w3.org>, WCAG WG <w3c-wai-gl@w3.org>, "public-comments-wcag20@w3.org" <public-comments-wcag20@w3.org>, Gregg Vanderheiden <gv@trace.wisc.edu>, "kirsten@can-adapt.com" <kirsten@can-adapt.com>
Message-ID: <20131128140300267919.da085b38@xn--mlform-iua.no>
Leif Halvard Silli, Thu, 28 Nov 2013 13:59:30 +0100:
> Steve Faulkner, Thu, 28 Nov 2013 12:51:05 +0000:
>> Hi stefan, issue with this is
>> 
>> SR output: graphic Giraffe grazing on tree branches ... Giraffe grazing on
>> tree branches
> 
> Stefan has a point. But perhaps your comment in reality shows that 
> Stefan’s example needs an *empty* alt?
> 
> <img src="../images/giraffe.jpg" aria-labelledby="123" alt="" />
> <p id="123">Giraffe grazing on tree branches</p>

Hm. Forget it. Wouldn't change anything. But an aria-hidden="true" 
would help:

<img src="../images/giraffe.jpg" aria-labelledby="123" />
<p aria-hidden="true" id="123">Giraffe grazing on tree branches</p>

Leif H Silli

 
>> SteveF
>> HTML 5.1 <http://www.w3.org/html/wg/drafts/html/master/>
>> 
>> 
>> On 28 November 2013 12:48, Schnabel, Stefan 
>> <stefan.schnabel@sap.com> wrote:
>> 
>>>>> So, to replace @alt with an @aria-* attribute, would be to do the
>>> opposite of what the WCAG Robustness principle requires
>>> 
>>> No.
>>> 
>>> <img src="../images/giraffe.jpg" aria-labelledby="123"/>
>>> <p id="123">Giraffe grazing on tree branches</p>
>>> 
>>> is equivalent since even if the image is missing the text describing the
>>> image is still there.
>>> 
>>> - Stefan
>>> 
>>> 
>>> -----Original Message-----
>>> From: Leif Halvard Silli [mailto:xn--mlform-iua@målform.no]
>>> Sent: Donnerstag, 28. November 2013 13:31
>>> To: Steve Faulkner
>>> Cc: Schnabel, Stefan; Michael Cooper; David MacDonald; Janina Sajka; HTML
>>> Accessibility Task Force; WCAG WG; public-comments-wcag20@w3.org; Gregg
>>> Vanderheiden; kirsten@can-adapt.com
>>> Subject: Re: Clarification of WCAG intent and meaning of techniques [Re:
>>> WCAG considering amending F65 to NOT fail missing ALT text if title or
>>> aria-label is present]
>>> 
>>> Steve Faulkner, Thu, 28 Nov 2013 10:24:29 +0000:
>>>> Hi Stefan, this only works for criteria that are solely contingent upon
>>>> accessibility APIs exposing information to AT.
>>>> 
>>>> For the case of alt it has not been agreed that this is the case.
>>>> 
>>>> Ramon, for example brought up the case of a low vision user who turns off
>>>> images in the browser because the information in the images is difficult
>>> to
>>>> perceive, but the alt text exposed as text by the browser is not. This
>>>> involves no AT.
>>>> 
>>>> In this case what is required for all of the suggested alternatives
>>>> aria-label etc is that they are displayed in place of an image when an
>>>> image is not displayed. This is currently not the case. If we can
>>> interest
>>>> browser implementers exposing aria-label as text in this case then we
>>> have
>>>> a practical alternative to alt.
>>> 
>>> So, to replace @alt with an @aria-* attribute, would be to do the
>>> opposite of what the WCAG Robustness principle requires:
>>> http://www.w3.org/TR/WCAG20/#robust

>>> 
>>> Leif H Silli
>>> 
Received on Thursday, 28 November 2013 13:03:32 UTC

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