IMPORTANT: Instructions
Please read carefully the Instructions for the
"Benefits of WCAG 2" Presentation at
www.w3.org/WAI/presentations/WCAG20_benefits/
for an introduction, tips, and permission to use.
The Notes section for each slide contains important
information. Make sure you can read the Notes. On this
slide, the notes start with “[NOTES SECTION: This is where
the important information is…]”
Copyright © 2007-2010 W3C® (MIT, ERCIM, Keio)
See www.w3.org/Consortium/Legal/ipr-notice
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Benefits of
Web Content Accessibility Guidelines
WCAG 2
Developed with material from the
W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Updated 12 August 2010
WCAG 2 is
 Web Content Accessibility Guidelines 2.0
 Web “content” = web pages, websites,
web applications, …
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
“
WCAG 2.0 creates the foundation for a new
level of standardization of web accessibility
around the world. Its practical and well
documented guidelines will allow web
participants in many countries to evolve
from a disparate set of practices to a unified
approach to web accessibility for all.
̶ Axel Leblois, Executive Director, G3ict,
United Nation Global Initiative for Inclusive ICTs
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
WCAG 2 gives you
 Cooperatively developed international
standard
 Applies to more advanced technologies
 Clearer criteria
 Flexible, adaptable
 Practical implementation examples and info
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Who develops WCAG
 Standards making body for the Web
 International, multi-stakeholder development
 Formal process for broad public review
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
How WCAG is developed
WCAG Working Group development
WCAG 2 Working Draft
Public review and comment
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Milestones
 Public Working Drafts
 Last Call Working Draft
 Candidate Recommendation -
Implementations
 Proposed Recommendation
 W3C Recommendation=Web Standard
December 2008
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Cooperation with accessibility
policies around the world
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
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
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Authorized Translations
 Policy for Authorized W3C Translations
 WCAG 2.0 Translations
www.w3.org/WAI/WCAG20/translations
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
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
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
WCAG 2 gives you
 Advances from WCAG 1
to WCAG 2
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
WCAG 2 gives you
 Applies to more advanced technologies
- current, future, non-W3C
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
WCAG 2
www.w3.org/TR/WCAG20/
 W3C Web Standard
 Stable
 Technology-independent, broadly applicable
 Defines functionality required by users
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
 Supporting document, “informative”
 Can be updated
WCAG 2 gives you
 Clearer “success criteria”,
more precisely testable
(still need human judgment)
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Testable Example
 WCAG 1.0 Checkpoint
2.2 Ensure that foreground and background
color combinations provide sufficient contrast
when viewed by someone having color
deficits…
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Questionable color contrast:
Testable Example
 WCAG 1.0 Checkpoint
2.2 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…
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
WCAG 2 gives you
 Adaptable, flexible
for different situations, and
developing technologies and techniques
Techniques
for different situations,
can use other techniques
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
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…
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Scripting allowed!
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
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
...
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
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
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Adaptability
through
accessibility-supported
ways of using
technologies
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
WCAG 2 gives you
 Extensive supporting materials,
practical implementation guidance
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
 Supporting document, “informative”
 Can be updated
 Lists the WCAG 2 requirements
 Provides summary information from the
other documents
 Links to details
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Additional support
 Overview of WCAG 2 Documents
www.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
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
“
By giving clear technical specifications
to website designers, and unifying webaccessibility standards, WCAG 2.0 directly
benefits users who have accessibility needs
due to disabilities.
It represents a crucial tool with which to
build a better and more inclusive web.
̶ Yannis Vardakastanis,
European Disability Forum (EDF)
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Questions?
 WAI home page
www.w3.org/WAI
 WAI Interest Group
www.w3.org/WAI/IG/
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
Source Material
Web Accessibility Initiative (WAI)
Benefits of WCAG 2.
Shawn Lawton Henry, ed.
Copyright © 2010 W3C® (MIT, ERCIM, Keio).
www.w3.org/WAI/presentations/
WCAG20_benefits/Overview
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
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
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
WCAG 2 benefits you!
Developed with material from W3C Web Accessibility Initiative (WAI)
www.w3.org/WAI/
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