Web checklist

Checkpoint 4.2b: Accessibility-Supported Technologies Only

Use accessibility supported technologies. Any information or functionality that is implemented in technologies that are not accessibility supported must also be available via technologies that are accessibility supported.


Rationale

Technology features can be relied upon to conform to WCAG 2.0 success criteria only if they are used in a way that is accessibility supported (link resides outside of ibm.com).

Basically, a Web content technology is accessibility supported when users' assistive technologies work with the Web technology and when the accessibility features of mainstream technologies work with the Web technology. Using a technology in a way that is accessibility supported means that it works with assistive technologies (AT) and the accessibility features of operating systems, browsers and other user agents.

To fully understand what it means for a technology to be accessibility supported, please carefully review the Understanding Accessibility Support section of the Understanding Conformance document of WCAG 2.0 (link resides outside of ibm.com).

Required development and unit test techniques

To comply with this checkpoint, you must meet all of the following techniques.

  1. Only accessibility supported (link resides outside of ibm.com) ways of using technologies are relied upon to satisfy the checkpoints in this checklist (e.g., the Dojo Dijit widgets).
  2. Any information or functionality that is provided in a way that is not accessibility supported is also available in a way that is accessibility supported.

copyright 2011, 2013 IBM Corporation

Last updated February 1, 2011.

W3C Recommendation 11 December 2008: http://www.w3.org/TR/WCAG20/ (link resides outside of ibm.com)
Consortium for Informatics and Mathematics, Keio University), All Rights Reserved.