L08.PZ3 - INM 313 Inclusive Design Lecture 3 Web...

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1 INM 313: Inclusive Design Lecture 3: Web Accessibility Slide 2 Lecture 3 Overview Jargons W3C WAI WCAG WCAG Conformance Web Content Accessibility Guidelines (WCAG) How do People with Special Needs Access the Web? Web Accessibility Evaluation The DRC Study
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2 Slide 3 Jargons ATAG: Authoring Tool Accessibility Guidelines For developers of: Editing tools specifically designed to produce Web content (e.g., WYSIWYG HTML & XML editor) Tools that offer the option of saving content in a Web format (e.g., Word) Tools that transform documents into Web formats Tools that produce multimedia, especially when it’s intended for the Web Tools for site management or site publication Tools for management of layout (CSS tool) UAAG: User Agent Accessibility Guidelines For developers of Web browsers, media players, assistive technologies, and other user agents Slide 4 W3C WAI WCAG World Wide Web Consortium (W3C) Web Accessibility Initiative (WAI)’s Web Content Accessibility Guidelines (WCAG): www.w3c.org/WAI. Now v. 1.0. Version 2.0 is coming out soon. Most widely used, many policies from various countries refer to WCAG. Themes of Accessible Design: Graceful Transformation (“Until user agents can do ….”) Making Content understandable and navigable
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3 Slide 5 Accessibility : The Bigger Picture Slide 6 Limitations of the Model This model: Requires all three components to be implemented in order for the WAI vision to be achieved Is of limited use to end users who have no control over browser or authoring tools developments Is confusing – as many think WCAG is WAI How does this model address: Delays in full conformance? (We're still waiting for " until user agents … " clause to be resolved) Real-world reluctance to deploy new software (issues of inertia, testing, costs, …) Real world complexities
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4 Slide 7 W3C WAI WCAG WCAG contains 14 guidelines. Each has: The guideline number and statement. The rationale behind the guideline and some groups of users who benefit from it. Checkpoints specific enough for verification and assignment of a priority based on its impact on accessibility. Priority One Must be followed or it is impossible for 1 or more groups to access info in the doc (A-level compliance). Priority Two Should be followed. Satisfying it will remove significant barriers for 1 or more groups (AA-level). Priority Three May be addressed. Satisfying it will improve access (AAA- level). Slide 8 WCAG Conformance Surveys using automated tools (which gives upper limit on accessibility) DRC (Disability Rights Commission) report: 19% A, 0.6% AA conformance based on 1,000 Web sites UK Museums report: 42% A, 3% AA conformance based on 124 Web sites UK Universities surveys (2002, 04): 43%/58% A, 2%/6% AA based on 160+ Web sites These low conformance levels can indicate: Organisations don't care Guidelines are difficult to implement Guidelines are inappropriate, misleading, wrong
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5 Slide 9 Web Content Accessibility Guidelines (WCAG) 1. Provide equivalent alternatives to auditory and visual content.
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  • Spring '09
  • ERIKBORÄLV
  • World Wide Web, Web Content Accessibility Guidelines, Web accessibility, Web Accessibility Initiative, Web Content Accessibility

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