Divergent Hierarchies

• responding to Fontana:

• > I think Jay was driving at divergent hierarchies, not multiple inheritance, eg:

• > relationship S1 - supertype Dog, subtypes BigDog and SmallDog

• > relationship S2 - supertype Dog, subtypes BlackDog and WhiteDog

Relationship S1:

(BLACK xor WHITE)

(Mutex and exhaustive):

DOG CLASS

Relationship S2:

(BIG xor SMALL)

(Mutex and exhaustive):

Black Dog

White Dog

Big Dog

Small Dog

Divergent Hierarchies Example:

> relationship S1 - supertype Dog, subtypes BigDog xor SmallDog

> relationship S2 - supertype Dog, subtypes BlackDog xor WhiteDog

Previous slide

Next slide

Back to first slide

View graphic version