In December 2008, the World Wide Web Consortium (W3C) published version 2.0 of their Web Content Accessibility Guidelines (WCAG), the first major revision since 1999. These guidelines define how to produce Web content that is accessible to people with disabilities, including visual, auditory and physical, as-well as people with changing abilities due to ageing.

Version 2.0 of the W3C WCAG document is not too dissimilar from previous versions, but is far more comprehensive and includes more detail and explanation of how to tackle potential accessibility issues.