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Benefits of Web Content Accessibility

Guidelines

WCAG 2

*DRAFT* Last Updated 13 July 2009

WCAG 2 is

Web Content Accessibility Guidelines 2.0

Web “content” = web pages, websites, web applications, …

WCAG 2 gives you

Cooperatively developed international standard

Applies to more advanced technologies

Clearer criteria

Flexible, adaptable

Practical implementation examples and info

Standards making body for the Web

International, multi-stakeholder development

Formal process for broad public review

Who develops WCAG

How WCAG is developed, Stage 1

WCAG Working Group development

Public review and comment

WCAG 2 Working Draft

Milestones

Public Working Drafts

Last Call Working Draft

Candidate Recommendation - Implementations

Proposed Recommendation

W3C Recommendation=Web StandardDecember 2008

Cooperation with accessibility policies

Integrated Accessibility Guidelines

WCAG for web content

ATAG for authoring tools, HTML editors, content management systems (CMS), blogs, wikis, etc.

UAAG for web browsers, media players, and other ‘user agents’

WAI-ARIA for accessible rich Internet applications developed with Ajax and such

Authorized Translations

Policy for Authorized W3C Translations

WCAG 2.0 Translationswww.w3.org/WAI/WCAG20/translations

Cooperatively developed International standard W3C Web Accessibility Initiative (WAI)

W3C process designed to:

ensure broad public input, and

encourage consensus development

Cooperation with accessibility policies

Integrated Web accessibility standards suite

Authorized Translations

WCAG 2 gives you

Advances from WCAG 1to WCAG 2

WCAG 2 gives you

Applies to more advanced technologies- current, future, non-W3C

WCAG 2

www.w3.org/TR/WCAG20/

W3C Web Standard

Stable

Technology-independent, broadly applicable

Defines functionality required by users

Supporting document, “informative”

Can be updated

WCAG 2 gives you

Clearer “success criteria”, more precisely testable

(still need human judgment)

Testable Example

WCAG 1.0 Checkpoint2.2 Ensure that foreground and background color combinations provide sufficient contrast when viewed by someone having color deficits…

Questionable color contrast:

Testable Example

WCAG 1.0 Checkpoint2.2 Ensure that foreground and background color combinations provide sufficient contrast when viewed by someone having color deficits…

WCAG 2 Success Criteria 1.4.3 The visual presentation of

text and images of text has a contrast ratio of at least 4.5:1…

WCAG 2 gives you

Adaptable, flexiblefor different situations,and developingtechnologies and techniques

Techniquesfor different situationscan use other techniques

More design flexibility, e.g.: WCAG 1.0

Until user agents allow users to … 7.1 ... avoid causing the screen to flicker. 7.2 ... avoid causing content to blink… 7.3 ... avoid movement in pages.

WCAG 2 allows more movement within defined parameters 2.2.2 Blinking… 2.2.3 Pausing… 2.3.1 Three Flashes or Below Threshold… 2.3.2 Three Flashes…

Scripting allowed!

Scripting Techniques

Providing client-side validation and alert

Providing a script that warns the user a time limit is about to expire

Using progressive enhancement to open new windows on user request

Using functions of the Document Object Model (DOM) to add content to a page

. . .

Flexibility for rich Internet applications (Ajax, DHTML) WAI-ARIA:

Accessible Rich Internet Applications Suite For example, accessible and highly

usable expanding and collapsing menus/tree controls/nav bars

Techniques for meeting WCAG 2

Adaptability throughaccessibility-supported

technologies

WCAG 2 gives you

Extensive supporting materials, practical implementation guidance

Supporting document, “informative”

Can be updated

Lists the WCAG 2 requirements

Provides summary information from the other documents

Links to details

Additional support

Overview of WCAG 2 Documentswww.w3.org/WAI/intro/wcag

WCAG 2 FAQ

WCAG 2 at a Glance

WCAG 2 transition documents: How WCAG 2 Differs from WCAG 1 Comparison of WCAG 1 to WCAG 2 How to Update Your Website

Questions?

WAI home page

www.w3.org/WAI WAI Interest Group

www.w3.org/WAI/IG/

Source Material

Benefits of WCAG 2Web Content Accessibility Guidelines

W3C WAI Education and Outreach Working Group

www.w3.org/WAI/presentations/WCAG20_benefits/

Benefits of WCAG 2

Cooperatively developed international standard

Applies to more advanced Web technologies current, future, non-W3C

Clearer criteria, more precisely testable

Adaptable, flexible for different situations,and developing technologies and techniques

Extensive supporting materials,practical implementation guidance

WCAG 2benefits you!