DIVE INTO HTML5
BY MARK PILGRIM
Switching to HTML5 can be as simple as changing your doctype. The doctype should already be on the first line of every HTML page. Previous versions of HTML defined a lot of doctypes, and choosing the right one could be tricky. In HTML5, there is only one doctype:
Upgrading to the HTML5 doctype won’t break your existing markup, because obsolete elements previously defined in HTML 4 will still render in HTML5. But it will allow you to use — and validate — new semantic elements like <article>, <section>, <header>, and <footer>.
This is an interesting web reference on HTML5 , simplified for the average web page creator.
Check it out here; http://diveintohtml5.info/index.html.