HTML5 is really more than one thing. In the strictest sense, HTML5 is fifth major revision of the W3C specification of the markup language that is used to create web pages.

But in a practical sense, HTML5 is far more than that. For developers, HTML is a wave of technologies that are evolving and gaining browser implementations along roughly the same time-line as the markup language itself. Many of the related technologies are being spearheaded by the Web Hypertext Application Technology Working Group (whatwg.org), but still other technologies in this genre are driven from elsewhere. For example WebGL, the 3D rendering en/Apps/Getting_Started)engine for Web Apps, is driven at Khronos (http://www.khronos.org/), and Mozilla’s WebAPI team (https://wiki.mozilla.org/WebAPI) is leading a collection of relevant API work including a comprehensive array of device-specific APIs. And the W3C was a Device APIs Working Group ( http://www.w3.org/2009/dap/ )

Mozilla is also investing heavily in an initiative to facilitate the use of standards-based Web technologies to build applications that can be installed and used in the same way a “native” applications would be.

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