HTML5 is a core technology markup language of the Internet used for structuring and presenting content for the World Wide Web.
It is the fifth revision of the HTML standard (created in 1990 and standardized as HTML 4 as of 1997) and, as of December 2012, is a candidate recommendation of the World Wide Web Consortium (W3C). Its core aims have been to improve the language with support for the latest multimedia while keeping it easily readable by humans and consistently understood by computers and devices (web browsers, parsers, etc.).
HTML5 is intended to subsume not only HTML 4, but also XHTML 1 and DOM Level 2 HTML.