Share This
« Back to Glossary Index
  • Rating:
  • (653)

HTML5 (see Spec from W3C) is the fifth revision of the HTML standard. HTML5 handle multimedia and graphical content on the web without having to resort to proprietary plugins and APIs. HTML5 application can be used to develop mobile applications as well as regular web application (Source WikiPedia)

HTML5 (Wikipedia)
(HyperText Markup Language)
HTML5 logo and wordmark.svg
Filename extension.html
Internet media typetext/html
Type codeTEXT
Uniform Type Identifier (UTI)index.html
Developed byWorld Wide Web Consortium and WHATWG
Initial release28 October 2014
(13 months ago)
Latest release
HTML 5.1(working draft)
Type of formatMarkup language
Extended toXHTML5 (XML-serialized HTML5)
StandardW3C HTML5
W3C HTML 5.1
Open format?Yes
XHTML5 (XML-serialized HTML5)
Filename extension.xhtml, .html
Internet media typeapplication/xml, application/xhtml+xml
Developed byWorld Wide Web Consortium and WHATWG
Type of formatMarkup language
Extended fromXML, HTML5
Open format?Yes

HTML5 is a markup language used for structuring and presenting content on the World Wide Web. It was finalized, and published, on 28 October 2014 by the World Wide Web Consortium (W3C). This is the fifth revision of the HTML standard since the inception of the World Wide Web. The previous version, HTML 4, was standardized in 1997.

Its core aims are 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.

Following its immediate predecessors HTML 4.01 and XHTML 1.1, HTML5 is a response to the fact that the HTML and XHTML in common use on the World Wide Web have a mixture of features introduced by various specifications, along with those introduced by software products such as web browsers and those established by common practice. It is also an attempt to define a single markup language that can be written in either HTML or XHTML. It includes detailed processing models to encourage more interoperable implementations; it extends, improves and rationalizes the markup available for documents, and introduces markup and application programming interfaces (APIs) for complex web applications. 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 would top 1 billion in 2013.

In particular, HTML5 adds many new syntactic features. These include the new <video>, <audio> and <canvas> elements, as well as the integration of scalable vector graphics (SVG) content (replacing generic <object> tags), and MathML for mathematical formulas. These features are designed to make it easy to include and handle multimedia and graphical content on the web without having to resort to proprietary plugins and APIs. Other new page structure elements, such as <main>, <section>, <article>, <header>, <footer>, <aside>, <nav> and <figure>, are designed to enrich the semantic content of documents. New attributes have been introduced, some elements and attributes have been removed and some elements, such as <a>, <cite> and <menu> have been changed, redefined or standardized. The APIs and Document Object Model (DOM) are no longer afterthoughts, but are fundamental parts of the HTML5 specification. HTML5 also defines in some detail the required processing for invalid documents so that syntax errors will be treated uniformly by all conforming browsers and other user agents.

About David Rashty

David Rashty, an entrepreneur and one of the early web pioneers, has over twenty years’ experience as a CTO and a CEO. He has been involved in several start-ups and established companies and was the founder of two successful ventures.David is currently using his proven leadership and management skills to act as a Part Time CTO or "JumpStart" CTO for several early-stage ventures; this includes helping them design and develop their product and IT infrastructure.David holds a BS in computer science and an M.Sc in educational technology. He has been a adjunct university professor, given numerous workshops, written several books and articles on information technology and received numerous innovation awards.