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Comments about correlation between WCAG 2.0 and UAAG 1.0

From: Catherine Laws <claws@us.ibm.com>
Date: Thu, 20 Apr 2006 10:10:25 -0500
To: Jim Allan <jimallan@tsbvi.edu>
Cc: WAU-ua <w3c-wai-ua@w3.org>
Message-ID: <OFBB1C9CB2.5086F389-ON86257156.0048CE58-86257156.00535A1A@us.ibm.com>
Here are some comments I have so far regarding your WCAG 2.0 - UAAG 1.0
correlation in http://www.tsbvi.edu/technology/uawg/wcag2.htm:


For WCAG Guideline 1.1 Provide text alternatives for all non-text content:

Additional UAAG guidelines that apply are:  Guideline 1.3 (P1), which talks
about handling non-text messages, and Guideline 2.8 (P3) No repair text
talks about empty content as appropriate for non-text content that is
decoration.

For WCAG Guideline 1.2 Provide synchronized alternatives for multimedia : I
don't think UAAG Guidelines 4.4  and 4.5 about controlling multimedia
apply, but I think UAAG 2.5 Make captions, transcripts, audio descriptions
available (P1) and 4.6 Do not obscure captions do cover WCAG 1.2.1 - 1.2.4.
A lower priority (P3) version of UAAG 2.5 could possibly be written to
cover WCAG 1.2.5 (sign language), 1.2.6 (extended audio descriptions), and
1.2.7 (full multimedia text alternative).

For WCAG 1.3.2 Any information that is conveyed by color is visually
evident without color, the following UAAG guidelines apply because they
discuss user configuration of color and about not relying on color alone to
convey information:
- 4.3 Configure text colors (P1)
- 10.2 Highlight selection content focus, enabled elements, and visited
links (P1)
- 10.6. Highligh current viewport (P1)

For WCAG 1.3.4 Information that is conveyed by variations in presentation
of text is also conveyed in text or the variations in presentation of text
can be programmatically determined. and 1.3.5 Information required to
understand and operate content does not rely on shape, size, visual
location, or orientation of components,  the following UAAG guidelines
apply as well as UAAG 6.4:
4.1 Configure text scale (P1)
4.2 Configure font family (P1)
4.11 Configure speech synthesizer characteristics (such as voice) (P1)

For WCAG 1.4.1 Text or diagrams, and their background, have a luminosity
contrast ratio of at least 5:1, the following UAAG guidelines also discuss
a contrast ratio and configuration of the background colors, but none of
them specify this specific 5:1 ratio:
- 4.6 Do not obscure captions (P1)
- 10.2 Highlight selection content focus, enabled elements, and visited
links (P1)

UAAG 4.8 Independent volume control, does not discuss independent control
of background and foreground sounds as indicated by WCAG 1.4.2 and 1.4.4.

For WCAG 2.1 Make all functionality operable via a keyboard interface , the
following UAAG guidelines also apply:
- 1.2 Activate event handlers (through keyboard input alone) (P1)
- 11.4 Single key access (for a specific list of user agent functionality)
(P2)

Cathy Laws

Manager - IBM Software Group (SWG) Accessibility Architecture and
Development
11501 Burnet Road,  Bldg 902 Office 5C016, Austin, Texas 78758
Phone: (512) 838-4595  FAX: (512) 246-8502
E-mail: claws@us.ibm.com, Web: http://www.ibm.com/able


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Received on Thursday, 20 April 2006 15:20:46 GMT

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