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[Bug 9215] New: Provide a Webcam example that is in accord with WCAG 2 or Defer to "HTML5: Techniques for providing useful text alternatives"

From: <bugzilla@wiggum.w3.org>
Date: Mon, 08 Mar 2010 16:41:41 +0000
To: public-html-bugzilla@w3.org
Message-ID: <bug-9215-2486@http.www.w3.org/Bugs/Public/>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=9215

           Summary: Provide a Webcam example that is in accord with WCAG 2
                    or Defer to "HTML5: Techniques for providing useful text
                    alternatives"
           Product: HTML WG
           Version: unspecified
          Platform: PC
               URL: http://dev.w3.org/html5/spec/text-level-
                    semantics.html#unknown-images
        OS/Version: All
            Status: NEW
          Keywords: a11y, a11y_text-alt
          Severity: normal
          Priority: P2
         Component: HTML5 spec bugs
        AssignedTo: dave.null@w3.org
        ReportedBy: laura.lee.carlson@gmail.com
         QAContact: public-html-bugzilla@w3.org
                CC: ian@hixie.ch, mike@w3.org, public-html@w3.org, public-
                    html-a11y@w3.org
        Depends on: 8171


SPEC SECTION: 
Images whose contents are not known [1] 

The "Images whose contents are not known" section of the HTML5 spec contains
the following regarding Webcams. 

<blockquote
cite="http://dev.w3.org/html5/spec/text-level-semantics.html#unknown-images">
In some unfortunate cases, there might be no alternative text available at all,
either because the image is obtained in some automated fashion without any
associated alternative text (e.g. a Webcam), or because the page is being
generated by a script using user-provided images where the user did not provide
suitable or usable alternative text (e.g. photograph sharing sites), or because
the author does not himself know what the images represent (e.g. a blind
photographer sharing an image on his blog).

In such cases, the alt attribute's value may be omitted, but one of the
following conditions must be met as well:

* The title attribute is present and has a non-empty value.
* The img element is in a figure element that contains a figcaption element
that contains content other than inter-element whitespace.
* The img element is part of the only paragraph directly in its section, and is
the only img element without an alt attribute in its section, and its section
has an associated heading."
</blockquote>


BUG DESCRIPTION:

There would always be something a person could provide for a Webcam text
alternative.

Please provide an example that is in line with WCAG 2 or defer to "HTML5:
Techniques for providing useful text alternatives":
http://dev.w3.org/html5/alt-techniques/ as it is anticipated that a Webcam
example will be added there. http://www.w3.org/Bugs/Public/show_bug.cgi?id=9174 

REFERENCES:

http://dev.w3.org/html5/spec/text-level-semantics.html#unknown-images [1]


HTML5 ISSUE AND CHANGE PROPOSAL:

This is associated with HTML TRACKER ISSUE-31 
http://www.w3.org/html/wg/tracker/issues/31

Change Proposal: Replace img Guidance for Conformance Checkers:
http://www.w3.org/html/wg/wiki/ChangeProposals/ImgElement20090126


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Received on Monday, 8 March 2010 16:41:42 GMT

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