W3C: Web Content Accessibility Guidelines (WCAG) 2.0

The Web Accessibility Initiative of the World Wide Web Consortium has created recognized voluntary international guidelines for web accessibility. These guidelines, set out in the WCAG, detail how to make web content accessible to individuals with disabilities. The WCAG 2.0 contains 12 guidelines addressing web accessibility. Each guideline contains testable criteria for objectively determining if web content satisfies the guideline. In order for a web page to conform to the WCAG 2.0, the web page must satisfy the criteria for all 12 guidelines.