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Created ACTION-280 - Write flash or canvas fallback content use case for intent for GL3

From: Jim Allan <jimallan@tsbvi.edu>
Date: Tue, 9 Feb 2010 14:26:19 -0600
To: "'UAWG list'" <w3c-wai-ua@w3.org>
Message-ID: <07e201caa9c6$23788480$6a698d80$@edu>
Use Case Flash (OBJECT with fallback content)
User has a browser with Flash enabled. A webpage has Flash content (OBJECT
element) which is inaccessible to the user. The author has included
'fallback content' within the OBJECT element. 
1. The user disables flash content using browser UI controls and the
fallback content becomes perceivable and usable. 
2. The user agent detect fallback content within the OBJECT. The browser
inserts an actionable element (e.g. an icon) after the OBJECT. When the user
activates the icon the fallback content opens in a new window, or appears in
place of the primary OBJECT content.

Use Case CANVAS (with fallback content)
A webpage has CANVAS content which is inaccessible to the user. The author
has included 'fallback content' within the CANVAS element. 
1. The user agent detect fallback content within the CANVAS. The browser
inserts an actionable element (e.g. an icon) after the CANVAS. When the user
activates the icon the fallback content opens in a new window, or appears in
place of the CANVAS.

HTML5 Definition of FALLBACK CONTENT
http://www.w3.org/TR/html5/embedded-content-0.html 

3.2.5.1.6 Embedded content

Embedded content is content that imports another resource into the document,
or content from another vocabulary that is inserted into the document.

    * audio
    * canvas
    * embed
    * iframe
    * img
    * math
    * object
    * svg
    * video

Elements that are from namespaces other than the HTML namespace and that
convey content but not metadata, are embedded content for the purposes of
the content models defined in this specification. (For example, MathML, or
SVG.)

Some embedded content elements can have fallback content: content that is to
be used when the external resource cannot be used (e.g. because it is of an
unsupported format). The element definitions state what the fallback is, if
any.

Jim Allan, Accessibility Coordinator & Webmaster
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 Tuesday, 9 February 2010 20:27:01 GMT

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