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WCAG 2.0Web Content Accessibility

GuidelinesUpdate

DRAFT Last Updated 16 August 2007

Note: This document contains unapproved draft ideas and should not be referenced or quoted under any circumstances.

Talk about today

1. What is WCAG- along with Who, Where, When, Why, and How

2. What WCAG 2 gives you- Applies to more advanced technologies- Clearer criteria- Flexible, adaptable- Practical implementation examples and info

3. Making accessibility easier & better- Authoring tools and browsers

4. What you can do now

We won’t cover

The basics of Web accessibility and WCAG 1.0

The business case

Policies, laws,

… and such

Will provide resources for these.

WCAG = Web Content Accessibility Guidelines

International standard

Applies to Web pages, sites, applications

For:

•Web developers and designers,

•Authoring tool and evaluation tool developers, and

•Others who need a technical standard.

• (not for novices)

The standards-making body for the Web

International, multi-stakeholder

Formal process

Who develops WCAG

How WCAG is developed, Stage 1

WCAG Working Group development

Community|Public review and comment

WCAG Working Draft

Getting better with age

For example, clearer with less jargon

2006 Draft:4.1.1 Web units or authored components can be parsed unambiguously, and the relationships in the resulting data structure are also unambiguous.

2007 draft:4.1.1 Parsing: Content implemented using markup languages has elements with complete start and end tags, except as allowed by their specifications, and are nested according to their specifications.

Getting better with age

Note new and improved documents:

•WCAG 2 FAQ

•WCAG 2.0 Quick Reference

•Summary of Issues, Revisions, and Rationales for Changes to WCAG 2.0 2006 Last Call Draft

When will WCAG 2.0be completed?

Milestones

Working Drafts

Last Call Working Draft

Milestones

Public Working Drafts

Last Call Working Draft

Candidate Recommendation

•Implementations

Proposed Recommendation

W3C Recommendation =Web Standard

How WAI Develops Accessibility Guidelines through the W3C Process: Milestones and Opportunities to Contribute

WCAG 1.0 --> WCAG 2.0

WCAG 2.0 WD

Principles

Guidelines

WCAG 1.0

Guidelines

WCAG 2.0 WD

Principles: POUR1.Perceivable

2.Operable

3.Understandable

4.Robust

Guidelines

WCAG 1.0

Guidelines

What WCAG 2 gives you

Easier to understand success, that is:

more precisely testable

(do still need human)

WCAG 2.0 WD Principles: P-O-U-R

Guidelines

•Success CriteriaLevel A, AA, AAA

WCAG 1.0

Guidelines

•CheckpointsPriority 1, 2, 3

WCAG 1.0 Checkpoint

•2.2 Ensure that foreground and background color combinations provide sufficient contrast when viewed by someone having color deficits…

WCAG 1.0 Checkpoint

•2.2 Ensure that foreground and background color combinations provide sufficient contrast when viewed by someone having color deficits…

WCAG 2.0 Success Criteria•Text (and images of text) have a

contrast ratio of at least 5:1…

(from the May 2007 Draft)

What WCAG 2 gives you

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

Adaptable, flexiblefor different situations,and developingtechnologies and techniques

WCAG 2.0

www.w3.org/TR/WCAG20/

Formal Web standard draft, planned to become a “W3C Recommendation”

“Normative”

WCAG 2.0 Techniques

“Informative”supporting document

Examples for HTML, CSS, etc.

Can be updated

WCAG 2.0 requirements are more flexible

More design flexibility

WCAG 1.0 Checkpoint 7.1:Until user agents allow users to control flickering, avoid causing the screen to flicker

WCAG 2.0 allows more movement within defined parameters

Scripting allowed!

Scripting Techniques

Providing client-side validation and alert

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

Using Dynamic Web Content Accessibility to programmatically identify form fields as required

. . .

Flexibility for rich Internet applications

WAI-ARIA:Accessible Rich Internet Applications Suite

Techniques for meeting WCAG 2.0

E.g., accessible and highly usable expanding and collapsing menus/tree controls/nav bars

WAI-ARIA status

Implementations already in browser and screen reader

Documents

1. Technical material for tool and specification developers

2. Best practices for Web content developers

WCAG 2.0 flexibility for different situations

Accessibility Supported Technologies

(formerly “Baseline”)

What WCAG 2 gives you

Extensive supporting materials, - practical implementation guidance

WCAG 2.0 WD Principles: P-O-U-R

Guidelines•Success Criteria

Level A, AA, AAA

2.0 Support Techniques +

Understanding

WCAG 1.0

Guidelines•Checkpoints

Priority 1, 2, 3

1.0 Support Techniques

WCAG 2.0

Techniques

“Informative”supporting document

Reference manual

Understanding

WCAG 2.0

Techniques

Understanding

WCAG 2.0

Techniques

Understanding

Quick Reference!

WCAG 2.0

Techniques

Understanding

Overview

WCAG 2 FAQ

Issues, Changes

Quick Reference!

What WCAG 2 gives you

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

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

More precisely testable

Extensive supporting materials, - practical implementation guidance

Accessibility ≠ WCAGAccessibility = people using Web WAI Resources

•How People with Disabilities Use the Web

• Involving Users in Web Accessibility [Design and] Evaluation

Videos

…

Understanding accessibility issues | how people with disabilities use your site

Who is responsible forWeb accessibility?

Components of Web Accessibility

Web Content(WCAG)

Components of Web Accessibility

User Agent(UAAG)

Web Content(WCAG)

Components of Web Accessibility

User Agent(UAAG)

Authoring Tool(ATAG)

Web Content(WCAG)

Making accessibilityeasier for site developers

and better for users!

A c t i o n !

Actively encourageaccessibility improvementsin tools

A c t i o n !

What else you can do now

Get into WCAG 2.0 Drafts

Using it

www.w3.org/WAI/WCAG20/quickref/

Quick Reference!

Learning about it

www.w3.org/WAI/intro/wcag20.php

Overview

Start here with WCAG 2.0

Talked about today

1. What is WCAG- along with Who, Where, When, Why, and How

2. What WCAG 2 gives you- Applies to more advanced technologies- Clearer criteria- Flexible, adaptable- Practical implementation examples and info

3. Making accessibility easier & better- Authoring tools and browsers

4. What you can do now

Questions?

WCAG 2 FAQwww.w3.org/WAI/WCAG20/wcag2faq

WAI Interest Group mailing listarchive:http://lists.w3.org/Archives/Public/w3c-wai-ig/

subscribe: www.w3.org/WAI/IG/Overview.html#Uselist

Actively encourage real accessibility

Reward web sites, tools, developers,

Thank you!

W3C WAIwww.w3.org/WAI/

Introduction to Web Accessibilitywww.w3.org/WAI/intro/accessibility

Understanding Web Accessibility[??non-W3C ok?]www.uiaccess.com/understanding.html

Developing a Web Accessibility Business Case for Your Organization www.w3.org/WAI/bcase/Overview

How WAI Develops Accessibility Guidelines through the W3C Processwww.w3.org/WAI/intro/w3c-process

WAI Resourceswww.w3.org/WAI/Resources/Overview

Overview of WCAG 2.0 Documentswww.w3.org/WAI/intro/wcag20

WCAG 2 FAQwww.w3.org/WAI/WCAG20/wcag2faq

WCAG 2.0 Quick Referencewww.w3.org/WAI/WCAG20/quickref/

Summary of Issues, Revisions, and Rationales for Changes to WCAG 2.0 2006 Last Call Draftwww.w3.org/WAI/GL/2007/05/change-summary

WAI-ARIA Suite Overview www.w3.org/WAI/intro/aria