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Review of WCAG 2

From: Jim Allan <allanj@tsbvi.edu>
Date: Wed, 13 Jun 2007 17:53:44 -0500
To: WAU-ua <w3c-wai-ua@w3.org>
Message-id: <HDEAKIPKOHBCMDILOOPNCEFMIEAB.allanj@tsbvi.edu>

WCAG 2.0 comments

Accessibility Supported definition
a nit: users' assistive technology is always listed before user agent
accessibility features. I think these should be reversed. My understanding
is UA accessibility features are enhanced by assistive technology to provide
the user with a richer experience. If the UA does not provide some
functionality, AT is able to create the functionality using information
exposed by the UA in creative ways. The AT can also create new functionality
without UA support, but this is rare. The user agent is the first layer for
parsing the content. The user agent is the mediator between the operating
system, accessibility APIs and assistive technology.

1.2.1 Captions (prerecorded)
Jim: open captions on the web must not just be 'visible', "Visible" is not
sufficient. The captions could be visible but unreadable (size too small,
poor contrast, etc.). While perceivable the captions would not be

3.1.6 A mechanism is available for identifying specific pronunciation of
words where meaning is ambiguous without knowing the pronunciation. (Level
suggests using the *ruby* element (HTML) (XHTML 1.1)
Jim: I think we have ruby covered under UAAG 2.1 Render according to

3.3.1 Error Identification
3.3.2 Error Suggestions
Jim: One of the techniques is "adding error text via the DOM" - will the UA
render the information on the screen, and will AT -  specifically screen
readers - reveal the inserted DOM text to the user?

UAAG note:
WCAG techniques to meet 1.1
this is related to UAAG 2.3 render conditional content (content inside
object element) (though the user cannot get conditional content if the
plug-in/whatever is installed and functional)

Jim Allan, Webmaster & Statewide Technical Support Specialist
Texas School for the Blind and Visually Impaired
1100 W. 45th St., Austin, Texas 78756
voice 512.206.9315    fax: 512.206.9264  http://www.tsbvi.edu/
"We shape our tools and thereafter our tools shape us." McLuhan, 1964
Received on Wednesday, 13 June 2007 22:51:56 UTC

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