$Id: daml+oil-ex.daml,v 1.1 2001/01/02 18:44:47 mdean Exp$
An example ontology
Animal
This class of animals is illustrative of a number of ontological idioms.
Animals have exactly two parents, ie:
If x is an animal, then it has exactly 2 parents
(but it is NOT the case that anything that has 2 parents is an animal).
hasAncestor
no car is a person
every person is a man or a woman
Adam
Adam is a person.