Integrating Accessibility into Content Management Systems - slide "W3C's Accessibility Guidelines"

Web Content Accessibility Guidelines 1.0, May 1999
- http://www.w3.org/TR/WCAG10
Authoring Tool Accessibility Guidelines 1.0, December 2000
- http://www.w3.org/TR/ATAG10
User Agent Accessibility Guidelines 1.0, December 2002
- http://www.w3.org/TR/UAAG10
Also XML Accessibility Guidelines Working Draft, October 2002
- http://www.w3.org/TR/xag