Overview
- W3C and WAI
- Developing with Guidelines
- Inside WCAG 2.0
- Conclusion and Questions
W3C and WAI
- » W3C and WAI
- Developing with Guidelines
- Inside WCAG 2.0
- Conclusion and Questions
World Wide Web Consortium (W3C)
Leading the Web to Its Full Potential...
- International vendor-neutral consortium
- Evolution and interoperability of the Web:
for everyone, everywhere on every thing
- Operates from: MIT, ERCIM, and Keio
- Develops HTML, CSS XML, SVG, ...
Web Accessibility Initiative (WAI)
One of five domains of W3C:
- Accessibility support in W3C technologies
- Guidelines for implementing accessibility
- Methods for evaluating accessibility
- Conducting education and outreach
- Coordinating with research and development
Developing with Guidelines
- W3C and WAI
- » Developing with Guidelines
- Inside WCAG 2.0
- Conclusion and Questions
Essential Components
alt Example
Lessons Learned
- Need to address diverse audience
- Need to address diverse situations
- Need to address diverse technologies
- Need to be more precisely testable
Inside WCAG 2.0
- W3C and WAI
- Developing with Guidelines
- Inside WCAG 2.0
- Conclusion and Questions
WCAG 2.0 Documents
- W3C Recommendation (status: Last Call)
- Supporting documents (status: Working Draft)
Example Guideline
- Principle 1: Content must be perceivable
- Guideline 1.4: Make it easy to distinguish foreground information from its background
- Level 1 Success Criteria for Guideline 1.4
- (No level 1 success criteria for this guideline.)
- Level 2 Success Criteria for Guideline 1.4
- 1.4.1 Text or diagrams, and their background, have a luminosity contrast ratio of at least 5:1.
- 1.4.2 A mechanism is available to turn off background audio that plays automatically, without requiring the user to turn off all audio.
- Level 3 Success Criteria for Guideline 1.4
- 1.4.3 Text or diagrams, and their background, have a luminosity contrast ratio of at least 10:1.
- 1.4.4 Audio content does not contain background sounds, background sounds can be turned off, or background sounds are at least 20 decibels lower than the foreground audio content, with the exception of occasional sound effects.
WCAG 2.0 Baselines
Draft: About Baselines and WCAG 2.0
- Set of technologies that an author assumes are supported and turned on in user agents and assistive technologies
- Web content meets WCAG 2.0 at the stated level of conformance if a user agent can support the technologies listed in the baseline
Note: the baseline does not include user agents, but the conformance claim could.
WCAG 2.0 Techniques
Working Draft: Techniques for WCAG 2.0
- Technology-specific techniques for meeting (or failing) success criteria
- Each Technique includes:
- Applicability
- User Agent and Assistive Technology Support Notes
- Description
- Examples
- Resources
- Related Techniques
- Tests
Understanding WCAG 2.0
Working Draft: Understanding WCAG 2.0
- Essential guide to learning and implementing WCAG 2.0
- Each section includes:
- Key terms
- Intent of the success criterion
- Techniques
- Benefits, how it helps people with disabilities
- Examples
- Related resources
Conclusion and Questions
- W3C and WAI
- Developing with Guidelines
- Inside WCAG 2.0
- » Conclusion and Questions
Conclusion
WCAG 2.0 is
- ...more precisely testable;
- ...technology independent;
- ...adaptable to situations;
- ...comprehensive material;
- ...still in development.
