UAAG2 proposed IER for 1.1.X Indicate Unrendered

Action: JR write new IER for 1.1.X Indicate Unrendered Alternative Content: The user can specify that indicators be displayed with rendered content when recognized unrendered alternative content is present. (Level A)

1.1.X Indicate Unrendered Alternative Content: The user can specify that indicators be displayed with rendered content when recognized unrendered alternative content is present. (Level A)

Intent of Success Criterion 1.1.X:
Users need to be able to easily discover when authors have provided alternative web content that may be of interest to them so that they can have decide whether to have it rendered (see 1.1.1). While the type of indicator is not prescribed, the success criterion does require that the indicator be placed with the rendered content that has the alternative, this rules out indicators in the status bar, etc. that do not clearly identify which content within a document has the alternative.  Examples of suitable indicators include outlines, adjacent icons, adjacent links, etc. As with any other feature of the user agent, the indicator itself must be accessible (e.g., be keyboard accessible, be zoomable, etc.)

Examples of Success Criterion 1.1.X:

NEW- Chris is color blind. He does not use a screen reader or other assistive technologies, but sometimes has difficulty interpreting diagrams in which the author has used color alone to convey meaning (e.g., to label lines). Therefore, Chris likes to read long descriptions when the author has provided them. To let himself know when long descriptions are available, Chris sets a setting in his browser that places a "Description" link adjacent to any image with a long description. Chris clicks the link the open the long description in a new browser pane. MOVED FROM 1.3.1- Aosa is blind. When rendering a Web page using synthesized speech, the user agent generates an audible tone to signify that the word being read is an acronym, and Aosa can press the * key to hear the expansion. When the phrase being read is the Alt text for an image, another tone indicates that Aosa can press + to hear the long description.
MOVED FROM 1.3.1- [mobile] Brin is deaf. The video player she is using has a button displayed beneath the playing video that indicates that captions are available. She clicks the button to toggle the captions on so she can understand the video. [mobile] On her mobile phone, Brin touches a video, which displays the controls including the "display caption" control.

Related Resources for Success Criterion 1.1.X:
- "HTML5 Image Description Extension (longdesc)" (http://www.w3.org/TR/html-longdesc/#longdesc)
- "User Agents and longdesc Discoverability" (http://www.d.umn.edu/~lcarlson/research/ld-ua.html) 
















(MR) JAN RICHARDS
PROJECT MANAGER
INCLUSIVE DESIGN RESEARCH CENTRE (IDRC)
OCAD UNIVERSITY

T 416 977 6000 x3957
F 416 977 9844
E jrichards@ocadu.ca

Received on Friday, 26 July 2013 16:45:19 UTC