The HTML5 specification defines the fifth major revision of the core language of the World Wide Web: the Hypertext Markup Language (HTML), also known as the lingua franca of the Web. The Web Hypertext Application Technology Working Group (WHATWG) started work on the HTML5 specification under the name Web Applications 1.0. As of October 2009, the specification is in the “Last Call” state at the WHATWG.
According to Hickson, the timeline for delivery of the HTML5 specification is: • First W3C Working Draft in October 2007 • Last Call Working Draft in October 2009 • Call for contributions for the test suite in 2011 • Candidate Recommendation in 2012 • First draft of test suite in 2012 • Second draft of test suite in 2015 • Final version of test suite in 2019 • Reissued Last Call Working Draft in 2020 • Proposed Recommendation in 2022
In addition to specifying markup, HTML5 specifies scripting application programming interfaces (APIs). There are also new APIs, such as:• The canvas tag for immediate mode 2D drawing • Timed media playback • Offline storage database • Document editing • Drag-and-drop • Cross-document messaging • Browser history management • MIME type and protocol handler registration
HTML5 aims to reduce the need for proprietary plug-in-based rich Internet application (RIA) technologies such as Adobe Flash, Microsoft Silverlight and Sun JavaFX, though it would take many years to do so. HTML4 did not allow the embedding or control of multimedia content, whereas HTML5’s new audio and video elements enable developers to embed and control multimedia content without Flash.
HTML5 technologies such as Canvas, for 2D drawing on a Web page, are finding their way into offerings from companies like Apple, Google and Mozilla.
Google’s Chrome browser has some HTML5 capabilities, such as video tags. Thus far, Google Chrome, Apple Safari, Opera and Firefox support HTML5 video. However, Opera and Firefox do not support the proprietary h.264 codec used for video players such as those from YouTube and Vimeo. Meanwhile, Microsoft’s Internet Explorer does not yet support HTML5 video. However, IE users can take advantage of HTML5 video by installing Google’s Chrome Frame open-source plug-in.
HTML5 delivers: a new, sensible tagging strategy; localized databases; rich animations without plug-ins; and real apps in the browser, among other things.Link to related post: http://www.webmonkey.com/blog/How_HTML_5_Is_Already_Changing_the_Web
After HTML5 is released the spec will switch to an non-versioned development model for the subsequent release. .Link to related post: http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2010-January/024708.html