HTML (HyperText Markup Language) is the most basic building block of the Web. It defines the meaning and structure of web content. Other technologies besides HTML are generally used to describe a web page’s appearance/presentation (CSS) or functionality/behaviour (JavaScript). Web content can be made accessible just by making sure the correct Hypertext Markup Language elements are used for the correct purpose. The HTML standard is developed and published by the World Wide Web Consortium (W3C).

WAI-ARIA is a specification written by the W3C, defining a set of additional HTML attributes that can be applied to elements to provide additional semantics and improve accessibility wherever it is lacking, for example for user interface controls that involve un-semantic HTML and dynamic Javascript.

UKAAF has no formal relationship directly with the W3C, but we retain connections through our work with the Daisy Consortium.