What is html5 and their features

HTML 5 is the next revision of the Hypertext Markup Language (HTML), the standard programming language for structuring and presenting content for the World Wide Web. Some of the new features in HTML5 are functions for embedding audio, video, graphics. Although it is still under development.

Established rules for HTML5

• New features should be based on HTML, CSS, DOM, and JavaScript
• Reduce the need for external plugins (like Flash)
• Better error handling
• More markup to replace scripting
• HTML5 should be device independent
• The development process should be visible to the public

 Features

Some of the most interesting new features in HTML5:

• The canvas element for drawing
• The video and audio elements for media playback
• Better support for local offline storage
• New content specific elements, like article, footer, header, nav, section
• New form controls, like calendar, date, time, email, url, search

Browser Support

HTML5 is not full  browsers support, because it is not an official standard yet.
For their latest versions all major browsers (Safari, Chrome, Firefox, Opera, Internet Explorer) continue to add new HTML5 features .