Accessibility 2.0
Understanding Accessibility Issues in the Interactive Web
Online at: www.w3.org/2006/Talks/0524-slh-www/Overview.html
- Components,
Power of Authoring Tool Accessibility, ATAG
- Moving to WCAG 2.0
- WCAG 2.0 and the Interactive Web
- JavaScript and Ajax Accessibility
- Evaluation and Report Language
- Questions, Discussion
Components and ATAG
Moving to WCAG 2.0
- Applies to more advanced Web technologies
- More precisely testable
- Easier to use and understand...
Note: Slide text abbreviated, see official documents.
Priority Checkpoints, Level Success Criteria
- WCAG 1.0
- Guidelines
- Checkpoints
Priority 1, 2, 3
- WCAG 2.0
- Principles
- Guidelines
- Success Criteria
Levels 1, 2, 3
Testable, Levels Example
- WCAG 1.0 Checkpoint 2.2 Ensure that foreground and background color combinations provide sufficient contrast when viewed by someone having color deficits or when viewed on a black and white screen
- WCAG 2.0 Success Criteria
1.4.1 Text or diagrams, and their background, have a luminosity contrast ratio of at least 5:1 [Level 2]
1.4.3 Text or diagrams, and their background, have a luminosity contrast ratio of at least 10:1 [Level 3]
Transitioning
WCAG 2.0 Supporting Documents
Applies to More Advanced
Understanding Baseline
- First, Why
- Flexibility for different situations today
- Flexibility over time
- Defined:
- Outside of WCAG 2.0
- By government, organization, author,...
- For example, SVG (Scalable Vector Graphics)
Baseline
- Set of technologies assumed supported, accessible
- That is, The minimum you need for the Web site to work
- Not browsers
- Can use technologies outside of baseline, provided usable without
- That is, Used for enhancement
- In Conformance statement, can list as "used but not relied upon"
Next Up
- Ben Caldwell, Trace Research and Development Center
- Becky Gibson, IBM
- Shadi About-Zahra, W3C WAI
- Questions, Discussion