Introduction to OOP: Chapter 1: Thinking Object-Oriented: [next] [previous] [audio] [real] [text]

Hierarchies of Categories

But there is more that I know about Flo then just that she is a Florist. I know she is a ShopKeeper, and a Human, and a Mammal, and a Material Objects, and so on.

At each level of abstraction I have certain information recorded. That information is applicable to all lower (more specialized) levels.

Intro OOP, Chapter 1, Slide 24