HTML 5 is a response to the comment, HTML and XHTML in general use on the World Wide Web, a mixture of features, presented by various properties, as well as the imported software products, such as Web browsers, which by common practice established, as well as many syntax errors in the existing documents on the Web. It is also an attempt, a markup language that can define write the HTML or XHTML syntax. Contains detailed processing models to promote more compatible implementations, and does, improve and simplify the scope for documents and makes the markup and APIs for complex web applications.
In particular, the syntax HTML5 adds many new features. These include video , audio and canvas Elements and integration of SVG content, designed to improve the insertion and manipulation of graphics and multimedia content on the Web without the use of plugins and proprietary APIs.
Other new elements such as section , article , header and nav are designed to improve the semantic richness of documents. Other elements have been eliminated. new attributes have also been introduced and others removed, to improve and simplify the semantic expression. Some elements, for example a, citeand/cite/a menu citeawere changed, refined or standardized. DOM APIs and works fine, but the basic elements of the HTML 5 specification. also defines in detail the processing of invalid documents, then syntax errors are user agents will be treated consistently in all browsers and other