Glossary
Web Content Accessibility Guidelines
The Web Content Accessibility Guidelines (WCAG) of the Web Accessibility Initiative (WAI) of the World Wide Web Consortium (W3C) provide a uniform standard for accessible web content (desktop websites, mobile websites and native mobile apps). Version 2.1 of WCAG contains a total of 78 success criteria. These can be divided into three different conformity levels: Level A, Level AA and Level AAA. Level A is the minimum level of compliance and level AAA is the highest. The criteria are divided into four principles: "Perceptible", "Operable", "Understandable" and "Robust".