The following are useful resources for more on microformats:
The microformat book at http://microformatique.com/book/
http://microformatique.com/book/
Micah Dubinko’s “What Are Microformats?”[321]
Uche Ogbuji’s “Microformats in Context”[322]
[321] http://www.xml.com/pub/a/2005/03/23/deviant.html
[322] http://www.xml.com/pub/a/2006/04/26/microformats-grddl-rdfa-nvdl.html