HTML 5 - A vocabulary and associated APIs for HTML and XHTML
HTML 5 is the 5th major revision of the core language of the World Wide Web: the Hypertext Markup Language (HTML). In this version, new features are introduced to help Web application authors, new elements are introduced based on research into prevailing authoring practices, and special attention has been given to defining clear conformance criteria for user agents in an effort to improve interoperability.
HTML 5 uses a namespaces associated with the URI http://www.w3.org/1999/xhtml.
Ample SDK implementation details
At the present moment HTML 5 in Ample SDK is in the development.