Need good example database schema

[Patrick K. O'Brien]

I'm looking for a good schema to use as an example for an object
database system.  Something like a books/authors/publishers or
teachers/students/courses kind of thing.  There are plenty of examples
of such to be found, especially in the academic literature involving
object databases, but most of them are pathetic.  It's hard to take a
schema seriously when it shows MarriedTeacher inheriting from Teacher,
etc.  I want something that makes proper use of inheritance, has
classes with reasonable attributes, and does a decent job reflecting
reality (ie, books can have more than one author, a teacher of one
course could be a student of another, etc.).  Any suggestions?

-- 
Patrick K. O'Brien
Orbtech      http://www.orbtech.com/web/pobrien
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