上海时时乐杀号软件:W3C Web Content Accessibility Guidelines 2 Conformance Logos

To further promote accessibility on the Web, W3C provides conformance logos for Web Content Accessibility Guidelines (WCAG) 2.0. Content providers can use these logos on their sites to indicate a claim of conformance to a specified conformance level of the Web Content Accessibility Guidelines 2.0. Note that this does not represent review or validation of conformance by W3C and/or WAI. We expect that use of these logos on conformant sites will help raise awareness of accessibility issues.

Conformance to WCAG 2.0 is defined in the Conformance section of the specification. Here is the excerpt that defines the conformance levels:

  • Conformance Level “A”: all Level A success criteria are satisfied;
  • Conformance Level “AA”: all Level A and AA success criteria are satisfied;
  • Conformance Level “AAA”: all Level A, AA, and AAA success criteria are satisfied;

Please refer to WCAG 2.0 for more information about information required in a conformance claim.

How to use the logos

Place the icon for the appropriate conformance level using the HTML source code below:

Level A Conformance

Put the following HTML markup in your page:

<a href="//www.tf5x.com.cn/WAI/WCAG2A-Conformance"
   title="Explanation of WCAG 2.0 Level A Conformance">
  <img height="32" width="88"
       src="//www.tf5x.com.cn/WAI/wcag2A"
       alt="Level A conformance,
            W3C WAI Web Content Accessibility Guidelines 2.0">
</a>

If you would like to use the blue logo, append “-blue” to the image src.

Level AA Conformance

Put the following HTML markup in your page:

<a href="//www.tf5x.com.cn/WAI/WCAG2AA-Conformance"
   title="Explanation of WCAG 2.0 Level Double-A Conformance">
  <img height="32" width="88"
       src="//www.tf5x.com.cn/WAI/wcag2AA"
       alt="Level Double-A conformance,
            W3C WAI Web Content Accessibility Guidelines 2.0">
</a>

If you would like to use the blue logo, append “-blue” to the image src.

Level AAA Conformance

Put the following HTML markup in your page:

<a href="//www.tf5x.com.cn/WAI/WCAG2AAA-Conformance"
   title="Explanation of WCAG 2.0 Level Triple-A Conformance">
  <img height="32" width="88"
       src="//www.tf5x.com.cn/WAI/wcag2AAA"
       alt="Level Triple-A conformance,
            W3C WAI Web Content Accessibility Guidelines 2.0">
</a>

If you would like to use the blue logo, append “-blue” to the image src.

Logos

Below are the logos as they will appear in your site. You may also choose to download and use local copies of the logos, using the links provided for each logo. You will have to adjust the HTML accordingly, but please use the same alternative text and link for the logo.

WCAG 2.0 Logos

  A AA AAA
Gold Level A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.0
(png, gif, svg, eps)
Level Double-A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.0
(png, gif, svg, eps)
Level Triple-A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.0
(png, gif, svg, eps)
Blue Level A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.0 (blue)
(png, gif, svg, eps)
WCAG 2.0 AA (blue)
(png, gif, svg, eps)
Level Triple-A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.0 (blue)
(png, gif, svg, eps)

WCAG 2.1 Logos

  A AA AAA
Gold Level A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.1
(png, gif, svg, eps)
Level Double-A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.1
(png, gif, svg, eps)
Level Triple-A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.1
(png, gif, svg, eps)
Blue Level A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.1 (blue)
(png, gif, svg, eps)
WCAG 2.1 AA (blue)
(png, gif, svg, eps)
Level Triple-A conformance icon, W3C-WAI Web Content Accessibility Guidelines 2.1 (blue)
(png, gif, svg, eps)

Scope of the claim

By default, a conformance icon refers to a single page. If the claim is meant to apply to include more than one page, the conformance icon must be accompanied by explicit scope information explaining which pages are covered by the claim.

Responsibility for accuracy of claims

Content providers are solely responsible for the use of these logos. Before using these logos as part of a conformance claim, we recommend that the provider be familiar with the Web Content Accessibility Guidelines 2.0 and use a variety of review methods to ensure that any page using this logo meets the conformance level claimed. Providers should also ensure that anyone maintaining or updating the site is familiar with logo use, and either re-reviews the page or removes the logo from the page if they are unsure whether it still meets a specified conformance level.

Please note that use of this logo is not conditional on an automated test. There is as yet no tool that can perform a completely automatic assessment on the checkpoints in the guidelines, and fully automatic testing may remain difficult or impossible. It is also possible for automated accessibility checkers to register “false negatives” or “false positives” due to the type of mark-up on a page. For these reasons, the logos on this page are used to indicate only a claim of conformance made by the author of a page, not a machine-validated conformance. In spite of these issues with machine testing, it is an important component of ensuring that a site conforms to WCAG 2.0, as long as it is not the only component.

Comments

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[email protected]
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