Mondial: The CIA World Factbook in Oracle, XML, F-Logic, and Datalog

If anyone is interested in exploring relational and XML design more 
concretely, perhaps Mondial is a good place to start. Mondial is a nice 
concrete example of data modeled in XML, Oracle SQL, F-Logic, and Datalog. 
Much of the data is taken from the CIA World Factbook. There are several 
XML representations.

Here is the Mondial home page:
http://www.informatik.uni-freiburg.de/~may/Mondial/

Jonathan