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Re: Proposed addition to applicability clause: content purpose

From: Ian Jacobs <ij@w3.org>
Date: Fri, 14 Apr 2000 16:51:02 -0400
Message-ID: <38F784B6.746597AE@w3.org>
To: w3c-wai-ua@w3.org
Hello again,

I forgot to mention that this is also related to issue 211, and
should be considered my response to the action item assigned
to me a the 10 April ftf [2]

 - Ian

[2] http://www.w3.org/WAI/UA/2000/04/rfbd-20000410#issue-211

Ian Jacobs wrote:
> 
> Hello,
> 
> Issue 210 [1] is about adding the term "author-specified" to
> the guidelines so that, for example, we can distinguish text equivalents
> that may be recognized by the UA from those that cannot (e.g.,
> when they are in prose). I would like to amend my proposal:
> 
> 1) We don't need to define "author-specified". It's understandable as
> is.
> 2) We add the provision to the applicability clause. So a checkpoint or
>    portion of a checkpoint applies unless:
> 
> <BLOCKQUOTE>
> It includes requirements about the purpose of content
> (e.g., transcript, caption, text equivalent, etc.)
> that the user agent cannot <a href="#def-recognize">recognize</a>
> through markup. For instance, HTML user agents can recognize "alt",
> OBJECT content, or NOFRAMES content as providing equivalents for
> other content since these are specified by the markup language.
> HTML user agents are not expected to recognize that an
> image description embedded in a paragraph is a text equivalent
> for the image.
> </BLOCKQUOTE>
> 
> I started to add "that the UA can recognize" to the checkpoints
> everywhere and realized it would be simpler to just a provision to
> the applicability clause. This applies to a lot of situations. For
> instance, the user might compose an image using ascii art, but the
> user agent is not required to recognize it as "an image" (having
> the purpose of an image).
> 
>  - Ian
> 
> [1] http://cmos-eng.rehab.uiuc.edu/ua-issues/issues-linear.html#210
> --
> Ian Jacobs (jacobs@w3.org)   http://www.w3.org/People/Jacobs
> Tel:                         +1 831 457-2842
> Cell:                        +1 917 450-8783

-- 
Ian Jacobs (jacobs@w3.org)   http://www.w3.org/People/Jacobs
Tel:                         +1 831 457-2842
Cell:                        +1 917 450-8783
Received on Friday, 14 April 2000 16:51:07 GMT

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