Possibly the most important invention of the past century, the web is undeniably one of the most robust engines of knowledge transfer, political and social change, artistic endeavor, and economic growth the world has seen.
The advantage of defining HTML 5 in terms of the DOM is that the language itself can be defined independently of the syntax. There are primarily two syntaxes that can be used to represent HTML documents - the HTML serialisation (HTML 5) and the XML serialisation (XHTML 5).