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HTML5
From Wikipedia, the free encyclopedia
HTML5
(HyperText Markup Language)

Filename extension .html, .htm
Internet media type text/html
Type code TEXT
Uniform Type Identifier public.html
Developed by World Wide Web Consortium and WHATWG
Type of format Markup language
Extended from SGML
Extended to XHTML5
Open format? Yes
Website whatwg.org/html
www.w3.org/TR/html5
XHTML5
Filename extension .xhtml, .xht, .xml, .html, .htm
Internet media type application/xml, application/xhtml+xml
Developed by World Wide Web Consortium and WHATWG
Type of format Markup language
Extended from XML, HTML5
Open format? Yes
Website www.whatwg.org/specs/web-apps/current-work/mu...he-xhtml-syntax.html
HTML
HTML and HTML5
Dynamic HTML
XHTML
XHTML Basic
XHTML Mobile Profile and C-HTML
Canvas element
Character encodings
Document Object Model
Font family
HTML editor
HTML element
HTML Frames
HTML5 video
HTML scripting
Web browser engine
Quirks mode
Style sheets
Unicode and HTML
W3C and WHATWG
Web colors
Web Storage
WebGL
Comparison of
document markup languages
web browsers
layout engines for
HTML
HTML5
HTML5 Canvas
HTML5 Media
Non-standard HTML
XHTML (1.1)
v d e
HTML5 is a language for structuring and presenting content for the World Wide Web, and is a core technology of the Internet originally proposed by Opera Software.[1] It is the fifth revision of the HTML standard (created in 1990 and standardized as HTML4 as of 1997)[2] and as of January 2012 is still under development. 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 XHTML 1 and DOM Level 2 HTML as well.[2]
Following its immediate predecessors HTML 4.01 and XHTML 1.1, HTML5 is a response to the observation that the HTML and XHTML in common use on the World Wide Web are a mixture of features introduced by various specifications, along with those introduced by software products such as web browsers, those established by common practice, and the many syntax errors in existing web documents. It is also an attempt to define a single markup language that can be written in either HTML or XHTML syntax. It includes detailed processing models to encourage more interoperable implementations; it extends, improves and rationalises the markup available for documents, and introduces markup and application programming interfaces (APIs) for complex web applications.[3] For the same reasons, HTML5 is also a potential candidate for cross-platform mobile applications. Many features of HTML5 have been built with the consideration of being able to run on low-powered devices such as smartphones and tablets. In December 2011 research firm Strategy Analytics forecast sales of HTML5 compatible phones will top 1 billion in 2013.[4]
In particular, HTML5 adds many new syntactical features. These include the new