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WCAG

Web Programming(IT342)

Assignment 2

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HISTORY

WCAG is a part of web accessibility

guidelines by theW3Cs Web Accessibility

Initiative.

WCAG 1.0 started on 1999.

WCAG sumurai led by Joe clark started

making corrections and build extensions

now called WCAG 2.0 by 2008 WCAG 2.0 is the latest version in use.

http://www.w3.org/WAI/http://www.w3.org/WAI/http://www.w3.org/WAI/http://www.w3.org/WAI/http://www.w3.org/WAI/

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Understanding WCAG

Web content = web pages, websites,

web applications, web documents, etc.

And Accessibility means format should

be accessible.

Web Accessibility also is a measure of

how effectively all people, including those

with disabilities, are able to access and useweb.

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WCAG 2.0 Principles

Content must be Perceivable.

Interface components in the content mustbe Operable

Content and controls must beUnderstandable

Content should be Robust enough to workwith current and future user agents

source:

http://www.w3.org/TR/WCGA20/

http://www.w3.org/TR/WCGA20/http://www.w3.org/TR/WCGA20/

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Properties of Accessible Sites:

Can be used by people with physicalimpairments.

Can be used by people who aretechnically and educationally backwards.

Easy for novice users to use.

Work with widest range of browsers andcurrent internet conventions.

Should meet all the guidelines of

WCAG 2.0

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Web Accessibility relation with

Business

Better the accessibility better is the

relation with public users.

Reduces the risk of Legal Actions sinceWCAG is a part of W3C standard.

It will increase the website use thus

increasing the revenue. Direct cost savings.

Increase the search engine optimization.

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WCAG 2.0 Guidelines

Text Alternatives:

Provide text alternatives for any non-text

content so that it can be changed intoother forms people need, such as large

print, Braille, speech, symbols or simpler

language.

Time-Based Media:

Provide alternatives for time-based media

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Continued

Adaptable:

Create content that can be presented in

different ways without losing information

or structure.

Distinguishable :

Make it easier for users to see and hear

content including separating foreground

from background.

More on next slide..

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Continued

Keyboard Accessible

Enough time

Seizures Navigable

Readable

Predictable Input Assistance

Compatible

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Success Criteria:

There are total of 61 success criteria.

It is used for specifying websiterequirements and conformance testing.

Few guidelines are as follows:

Info and Relationships.

Meaningful Sequence.

Sensory Characteristics.

Testable and Flexible.

And many more.

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Accessibility Supported Technology:

Web content technology must meet tworequirements to qualify as an accessibilitysupported web content technology.

The way that the web content technology isused must be supported by users assistivetechnology.

The web content technology must have

accessibility-supported user-agents availableto users.

Source: www.w3.org/TR/UNSERSTANDING-WCGA20/conformance.html

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Continued

W3C does not specify how much support

is necessary for the particular use of web

technologies to be considered as

accessibility supported.

However, only accessibility supported

ways of using technologies can be relied

upon to satisfy the WCAG Success

Criteria.

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Levels of Conformance :

Level A: For Level A conformance( the

minimum level of conformance), the web

page should satisfy all the Level A successcriteria.

Level AA: The web page should satisfy

both Level A and AA success criteria.

Level AAA: The web page should satisfy all

the level A, AA, AAA success criteria

defined by the standards.

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Source: http:www.w3.org/WAI/intro/wcag20

http:///reader/full/www.w3.org/WAI/intro/wcag20http:///reader/full/www.w3.org/WAI/intro/wcag20

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Challenges for WCAG

Flexibility for developers so that they can

test their pages with it.

Listing the web technologies which are

under accessibility standards.

Encouraging government to use the

standards so as to benefit the noviceusers.

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