With the advance of HTML 5, The Semantic Web is on its advance. HTML 5 now makes it easier for the Crawlers, Bots and other miscreant spiders to parse the HTML with its inclusion of header and footer tags.
Here are the following tags that are being used…
- header Good for parsers to ignore while analyzing the core content
- footer Just a normal copy-right/left crap
- nav Navigation duh! Easier for creepers to understand the horizontal or vertical relations of the content
- article Representing the core content of the page, the content/text for which the bot had been moving its eerie legs around
- aside
…a section of a page that consists of content that is tangentially related to the content…
http://diveintohtml5.org/semantics.html#new-elements