title: HTML 5, use of classes
body: <p>In the code below, we have for the section class="body" and a different class for each of ol, li. h2 , footer and div. What is the use of mentioning class="body" in the section  when we don't apply it anywhere? In case we give a css for the "body", how will it be reflected in the code?</p>
  
  <p><a href="http://coding.smashingmagazine.com/2009/08/04/designing-a-html-5-layout-from-scratch/" rel="nofollow">http://coding.smashingmagazine.com/2009/08/04/designing-a-html-5-layout-from-scratch/</a></p>