In a sense, nobody is in charge of the web. The web is an open standard, with no restrictions on who can post content, or what that content should be about. The web belongs to everybody, and so it belongs to nobody. The openness and decentralization of the web is one of its greatest strengths. But it wouldn't work at all without some sort of standard way of encoding the information. That's where the World Wide Web consortium (W3C) comes in.
The W3C is an international, vendor-neutral group that determines the protocols and standards for the web. They
These guidelines explain how to make Web content accessible to people with disabilities. The guidelines are intended for all Web content developers (page authors and site designers) and for developers of authoring tools. The primary goal of these guidelines is to promote accessibility. However, following them will also make Web content more available to all users, whatever user agent they are using (e.g., desktop browser, voice browser, mobile phone, automobile-based personal computer, etc.) or constraints they may be operating under (e.g., noisy
Synchronized Multimedia Integration Language (SMIL) is an XML language. Although content authors can create their own XML languages for such purposes, SMIL is the recommended language for creating multimedia presentations because it includes accessibility and internationalization features. SMIL is supported by two popular user agents for multimedia, RealPlayer and QuickTime Movie Player.
The W3C (http://www.w3.org/TR/SMIL-access/) points out that:
"Dynamic multimedia presents a number of challenges to people with disabilities and to authors of