checking for the type in pl/sql

If i have several type in pl/sql with sub-type how do I check to see what type the instance is; for example in java I would use instanceof

so if I have type:

person
student is sub type of person
full time sub type of student

faculty is sub type of person
adjunct is sub type of faculty

I want to check at runtime if my object istance is of type student, how do I do this. Received on Wed Oct 16 2002 - 18:35:08 CDT