(HTML5 from introduction to mastery -- a Chinese learning tutorialIntroduction to HTML5The HTML5 draft was formerly known as web applications 1.0. It was proposed by whatwg in 2004, accepted by W3C in 2007, and a new HTML working group was established. The first formal draft was released on January 22, 2008 and is expected to be officially recommended to the public in September 2010. Whatwg said that the specification is under development and there are still many years to go.new labelHTML5 provides some new elements and attributes, such as < NAV > (website navigation block) and < footer >. This tag will help search engines index and better help small screen devices and visually impaired people. In addition, it also provides new features for other browsing elements, such as < audio > and < video > tags.Some outdated html4 tags will be deleted. They are replaced by < center > and < CSS >.< video > tab)