New Structural Elements in HTML 5.....ShYaM..

In HTML 5 the new structural elements has a header denoted by

 div id="header"  a footer

 div id="footer"  some articles wrapped by an area called “content”.

 div id="content" and some navigation wrapped up in an area called “sidebar” .

 div id="sidebar". 

It’s a simple matter to change the HTML divs into the new elements. The only difficulty I had was deciding which element to use to mark up my sidebar, as it also includes a search field and site information as well as site-wide navigation.
Source : http://html5doctor.com/