W3C home > Mailing lists > Public > public-html@w3.org > August 2009

Re: feedback requested on WAI CG Consensus Resolutions on Text alternatives in HTML 5 document

From: Henri Sivonen <hsivonen@iki.fi>
Date: Thu, 20 Aug 2009 16:21:49 +0300
Cc: HTMLWG WG <public-html@w3.org>, W3C WAI-XTECH <wai-xtech@w3.org>
Message-Id: <79EE9437-E02F-4FD6-93D4-17789230209E@iki.fi>
To: Jan Richards <jan.richards@utoronto.ca>
On Aug 20, 2009, at 15:06, Jan Richards wrote:

> Henri Sivonen wrote:
>> Given enough rope, Web authors do the wildest things for the  
>> craziest reasons. However, here's a plausible non-crazy failure  
>> scenario:
>> Author A creates a document using an authoring tool and fails to  
>> make the document accessible. The authoring tool inserts the  
>> "ignore" marker. Later, author B in author A's organization  
>> addresses the problem that the document is inaccessible. Author B  
>> adds sensible alt text using a text editor. While author B has read  
>> introductions to Web accessibility to know about alt, author B  
>> isn't aware of the finer points of HTML syntax and fails to remove  
>> the "ignore" marker. Now the document is still inaccessible in UAs  
>> that honor the "ignore" marker. Author B could even test the  
>> document in older UAs without noticing the problem.
> I see. Perhaps this could be addressed somewhat by advising  
> authoring tools to automatically undo the "missing" mechanism if an  
> author edits the @alt value.

That author B uses a text editor and not an HTML-aware authoring tool  
is a key part of the scenario. I think it's a realistic key part.

The way to mitigate this is to make only validators and authoring  
tools sensitive to the "missing" marker and not to make browsers/AT  
sensitive to it at all.

Henri Sivonen
Received on Thursday, 20 August 2009 13:22:34 UTC

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