Hello Jeen,
I was not able to study your document right away due to lack of time. Anyway, I have started now
:-).
Reaching page 5, I already have some questions. Not really about OIL, but about the example
material. I drew a picture showing the subclass of hierarchy (see attachment). Here are my
questions:
* Why would one like to state that plant is not a subclass of animal? Isn't it sufficient to
leave out any relationship with animal? Then according to the model, these two are not related.
I can see some sense in stating that plant is everything that is not an animal. But then, the
modelling should not use 'subclassof' I guess.
* Isn't the lion misplaced?
* I have the feeling that carnivore and 'not carnivore' should be on the same 'level' in the
hierarchy. However, 'not carnivore' is one hop away from herbivore and 'carnivore' is 2 hops
away. This implies a difference in the hierarchy tree, or that 'not carnivore' has a higher
abstraction level than 'carnivore'. Or am I seeing things the wrong way here?
* When I say that class a is sublcassof b or subclassof c, what can I do with this information?
Why would you want to model classes via an 'OR'?
That's it for now :-).
regards,
Tom.
