WCAG 2.0 uses the same three levels of conformance ( A, AA, AAA) as WCAG 1.0, but has redefined them.
Guideline 4.1: Maximize compatibility with current and future user agents, including assistive technologies. Guideline 3.3: Help users avoid and correct mistakes.Ĭontent must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies. Guideline 3.2: Make web pages appear and operate in predictable ways. Guideline 3.1: Make text content readable and understandable. Information and the operation of user interface must be understandable. Guideline 2.4: Provide ways to help users navigate, find content, and determine where they are. Guideline 2.3: Do not design content in a way that is known to cause seizures. Guideline 2.2: Provide users enough time to read and use content. Guideline 2.1: Make all functionality available from a keyboard. User interface components and navigation must be operable. Guideline 1.4: Make it easier for users to see and hear content including separating foreground from background. Guideline 1.3: Create content that can be presented in different ways (for example simpler layout) without losing information or structure. Guideline 1.2: Time-based media: Provide alternatives for time-based media. Guideline 1.1: Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language. Information and user interface components must be presentable to users in ways they can perceive. The techniques are periodically updated whereas the principles, guidelines and success criteria are stable and do not change. The W3C's Techniques for WCAG 2.0 is a list of techniques that help authors meet the guidelines and success criteria. Each guideline has testable success criteria (61 in all). They consist of twelve guidelines organized under four principles (websites must be perceivable, operable, understandable, and robust). WCAG 2.0 were published as a W3C Recommendation on 11 December 2008. In February 2008, The WCAG Samurai, a group of developers independent of the W3C, and led by Joe Clark, published corrections for, and extensions to, the WCAG 1.0. Conformance to this level is described as AAA or Triple-A. Priority 3: Web developers may satisfy these requirements to make it easier for some groups to access the Web content. Conformance to this level is described as AA or Double-A. Priority 2: Web developers should satisfy these requirements, otherwise some groups will find it difficult to access the Web content. Conformance to this level is described as A. Priority 1: Web developers must satisfy these requirements, otherwise it will be impossible for one or more groups to access the Web content. 
Guideline 14: Ensure that documents are clear and simpleĮach of the in total 65 WCAG 1.0 checkpoints has an assigned priority level based on the checkpoint's impact on accessibility:. 
Guideline 13: Provide clear navigation mechanisms. 
Guideline 12: Provide context and orientation information.Guideline 11: Use W3C technologies and guidelines.Guideline 9: Design for device independence.Guideline 8: Ensure direct accessibility of embedded user interfaces.Guideline 7: Ensure user control of time sensitive content changes.Guideline 6: Ensure that pages featuring new technologies transform gracefully.Guideline 5: Create tables that transform gracefully.Guideline 4: Clarify natural language usage.Guideline 3: Use markup and style sheets, and do so properly.Guideline 2: Don't rely on colour alone.Guideline 1: Provide equivalent alternatives to auditory and visual content.
#SCT DEVICE UPDATER SOFTWARE HOW TO#
Each guideline covers a basic theme of web accessibility and is associated with one or more checkpoints that describes how to apply that guideline to particular webpage features. WCAG 1.0 consist of 14 guidelines-each of which describes a general principle of accessible design. They have since been superseded by WCAG 2.0. The WCAG 1.0 were published and became a W3C recommendation on.
Version 8 of the Unified Web Site Accessibility Guidelines, published in 1998, served as the starting point for the W3C's WCAG 1.0. These were brought together in the Unified Web Site Accessibility Guidelines compiled at the University of Wisconsin–Madison. Over 38 different Web access guidelines followed from various authors and organizations over the next few years. The first web accessibility guideline was compiled by Gregg Vanderheiden and released in January 1995, just after the 1994 Second International Conference on the World-Wide Web (WWW II) in Chicago (where Tim Berners-Lee first mentioned disability access in a keynote speech after seeing a pre-conference workshop on accessibility led by Mike Paciello).
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