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Re: [Bug 12587] AT shouldn't see img@alt="" and img@role=presentation as 100% synonyms

From: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
Date: Tue, 3 May 2011 20:17:20 +0200
To: Richard Schwerdtfeger <schwer@us.ibm.com>
Cc: Steve Faulkner <faulkner.steve@gmail.com>, public-html-a11y@w3.org
Message-ID: <20110503201720522423.f2704004@xn--mlform-iua.no>
Leif Halvard Silli, Tue, 3 May 2011 18:12:54 +0200,
in reply to Richard Schwerdtfeger:

>> The only time role="presentation should be allowed on an image is 
>> when it does not have an form of alternative text such as:
>> - alt=""
>> - title=""
>> either alt or title are absent as properties

Richard, your input here was very helpful when I shaped bug 12590, [1] 
which is the one I promised Steve I would file.
In regard to the bug discussed in the current thread, bug 12587, as 
well as in regard to you and Steve's advocation of alt="" as 
interchangeable with role=presentation, then your comments above shows 
that alt="" is not always equal to role=presentation, since an empty or 
omitted @title is required as well. 

This is new info. But not necessarily info which supports reopening the 

By the way: an empty @alt plus an empty or omitted @title is not the 
only thing that is required to make sure AT treats the IMG as 
presentational: judging by how VoiceOver behaves, there must also not 
be any @aria-label, @aria-labelledby or @aria-describedby. I have not 
said this in bug 12590 - but it perhaps should be said? Feel free to 
add it.

[1] http://www.w3.org/Bugs/Public/show_bug.cgi?id=12590
Leif H Silli
Received on Tuesday, 3 May 2011 18:17:53 UTC

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