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Re: example spec text for longdesc

From: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
Date: Mon, 21 Mar 2011 08:45:33 +0100
To: Steve Faulkner <faulkner.steve@gmail.com>
Cc: HTML Accessibility Task Force <public-html-a11y@w3.org>, HTMLWG WG <public-html@w3.org>
Message-ID: <20110321084533889388.e2e0db0d@xn--mlform-iua.no>
Steve Faulkner, Sun, 20 Mar 2011 13:05:00 -0700:

> I have written up example text adding it to the current spec text for 
> image. The additional text is identified using the <ins> element and 
> is futher differentiated from the current spec text using a 
> background color.
> 
> http://www.html5accessibility.com/tests/img-longdesc.html

Question: Why did you conclude that @longdesc should make img 
interactive content? 

]] If the element has a usemap or longdesc attribute:
   Interactive content. [[

*That* was an error in the previous change proposal. Why? Because HTML5 
forbids nesting of interactive content. [1] Which means that two of the 
use cases that @longdesc is claimed useful for in HTML4, would be 
forbidden:

  <!--would be forbidden:-->
  <a href=* ><img longdesc=* src=* alt=* ></a>

 <!--would be forbidden as it would represent 2 interactivisms-->
             <img longdesc=* src=* alt=* usemap=#* >

I've said this before (but perhaps not in public-html): HTML5 has 
really cut the corners when it comes to nesting of interactive content. 
In HTML4 and XHTML1, there e.g. was no restriction on wrapping a link 
around an image map: <a href=*><img src=* alt=* usemap=#*></a>. But 
this is not permitted in HTML5 anymore.

@longdesc should be considered more like @cite of <blockquote> - which 
aren't interactive content. Or what if there will be an 
@aria-describedAT="URL" at some point in the future? Should *that* also 
make the element interactive?

I hope you can update your experimental spec text to reflect this.

[1] 
http://dev.w3.org/html5/spec/introduction.html#restrictions-on-content-models-and-on-attribute-values
-- 
leif halvard silli
Received on Monday, 21 March 2011 07:46:10 GMT

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