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[Bug 20048] New: remove decorative image code example

From: <bugzilla@jessica.w3.org>
Date: Thu, 22 Nov 2012 19:50:09 +0000
To: public-html@w3.org
Message-ID: <bug-20048-2495@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=20048

            Bug ID: 20048
           Summary: remove decorative image code example
    Classification: Unclassified
           Product: HTML WG
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML Image Description Extension
          Assignee: chaals@yandex-team.ru
          Reporter: faulkner.steve@gmail.com
        QA Contact: public-html-bugzilla@w3.org
                CC: public-html@w3.org

There is disagreement over the decorative image example code in the spec:

<img src="DecorativeImage" alt="" title="decorative image"
longdesc="http://example.com/descs#item3">

It's is considered by at least one person that it conflicts with WCAG advice:
http://lists.w3.org/Archives/Public/public-html-a11y/2012Nov/0107.html

I would also make these other observations:


1.    The HTML5 spec defines use of alt=”” to equal role=presentation so
conforming user agents must implement alt=”” the same way as it.,
role=presentation which removes the img from the accessibility tree it also
removes its title attribute content

So this <img alt=”” title=”poot”> should not appear in the accessibility tree
same as <img role=”presentation” title=”poot”> does not appear as implemented
now.
2.    Though the above is not implemented (so it appears in the acc tree) when
an image has an alt=”” title text does not get announced in AT (tested in NVDA,
but pretty sure it is the case for others) nor does the presence of the image.
3.    Use of a title attribute in this case even if it was announced makes no
semantic difference as the title is used as the accessible name for the image
when an alt is not provided (example: <img title=”poot”>)
4.    If the title attribute is used it is presumed that this information
should be available to users other than AT users (who don’t get it anyway). It
is well know that this is not the case as the title attribute in not device
independent accessible as implemented in the vast majority of user agents.

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Received on Thursday, 22 November 2012 19:50:10 GMT

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