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Web and Software:WCAG2 Provisions not in 508 draft

Contents

Background

This page contains an analysis of the May 2007 WCAG 2.0 Level A and AA provisions as compared to the Web and Software subcommittee recommendation as of June 20, 2007. The subcommittee will consider any additional provisions that have not already been discussed and rejected.

WCAG 2 provision accepted but missing from our latest draft to the TEITAC

Due to human error, the following provision that we discussed and accepted was not included in our latest draft input to the TEITAC.

  • When the sequence in which content is presented affects its meaning, a correct reading sequence is programmatically determinable.
    • Introduced on December 13, 2007 as part of the discussion on readable with style sheets disabled. Action item assigned to Jim Thatcher.
    • Proposal accepted on December 20, 1007

WCAG 2 contains a similar provision which we should consider accepting instead:

  • 1.3.2 Meaningful Sequence: When the sequence in which content is presented affects its meaning, a correct reading sequence can be programmatically determined and sequential navigation of interactive components is consistent with that sequence.

WCAG 2 Level A Provisions not included in Web and SW subcommittee recommendation

The following WCAG 2 Level A Provisions are not covered by existing or proposed provisions Web and Software subcommittee recommendations.

  • 1.3.3 Size, Shape, Location: Instructions provided for understanding and operating content do not rely on shape, size, visual location, or orientation of components.
  • 1.4.2 Audio Turnoff: If any audio plays automatically for more than 3 seconds, either a mechanism is available to pause or stop the audio, or a mechanism is available to control audio volume which can be set independently of the system volume.
  • 2.4.3 Focus Order: If a Web page can be navigated sequentially, focusable components receive focus in an order that follows information and relationships conveyed through presentation. (Level A)
  • 3.1.1 Language of Page: The default human language of each Web page within the content can be programmatically determined.

WCAG 2 Level AA Provisions not included in Web and SW subcommittee recommendation

The following WCAG 2 Level AA Provisions are not covered by existing or proposed provisions in the Web and Software subcommittee recommendations.

  • 1.4.4 Resize text: Visually rendered text can be resized without assistive technology up to 200 percent and down to 50 percent without loss of content or functionality.
  • 2.2.2 Blinking: Content does not blink for more than three seconds, or a method is available to stop all blinking content in the Web page.
  • 2.4.5 Multiple Ways: More than one way is available to locate content within a set of Web pages where content is not the result of, or a step in, a process.
  • 2.4.6 Labels Descriptive: Headings and labels are descriptive.
  • 3.1.2 Language of Parts: The human language of each passage or phrase in the content can be programmatically determined.
  • 3.3.4 Labels or Instructions: Labels or instructions are provided when content requires user input.

WCAG 2 provisions already discussed and rejected by the subcommittee

The following WCAG 2 provisions are in the Web and Software subcommittee recommendations but they have been proposed, discussed, and rejected.

  • 3.2.1 On Focus: When any component receives focus, it does not initiate a change of context. (Level A)
  • 3.2.2 On Input: Changing the setting of any user interface component does not automatically cause a change of context unless the user has been advised of the behavior before using the component. (Level A)
  • 3.3.1 Error Identification: If an input error is automatically detected, the item that is in error is identified and described to the user in text. (Level A)
  • 3.2.3 Consistent Navigation: Navigational mechanisms that are repeated on multiple Web pages within a set of Web pages occur in the same relative order each time they are repeated, unless a change is initiated by the user. (Level AA)
  • 3.3.2 Error Suggestion: If an input error is detected and suggestions for correction are known, then the suggestions are provided to the user, unless it would jeopardize the security or purpose of the content. (Level AA)
  • 3.3.3 Error Prevention (Legal, Financial, Data): For forms that cause legal commitments or financial transactions to occur, that modify or delete user-controllable data in data storage systems, or that submit test responses, at least one of the following is true: (Level AA)
  • 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. (Level A)

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