How to make my site's categories appear in Google results? I would like my site's categories to appear in the Google results.
For example the bbc.co.uk has the categories "News","Learning English", etc.

Is there any module for this? Has this to do with RDF, microformats, or rich snippnets?
Drupal is fantastic for building SEO sites but still I think you can not do this. 
Google does this.
The official source is:
http://www.google.com/support/webmasters/bin/answer.py?hl=en&amp;answer=47334