1. Domain Class Diagram
Chapter 4 Part 2 pp

2. UML Class Diagrams Domain Class Diagram Design Class Diagram
In Analysis Phase, similar to the ERD
Models things in the users’ problem domain
Design Class Diagram
In Design Phase
Model software classes

3. ERD vs Domain Class Diagram
Entity
Attribute
Relationship
Cardinality
Instance
Domain Class
Attribute
Association
Multiplicity
Object

4. Association Types Regular Associations Association Class
Generalization Hierarchies  is-a
Whole-Part Associations  has-a

5. Association Class

6. Generalization Hierarchy
“is-a”
aka: Generalization/Specialization Hierarchy
Superclass (Base) & Subclass (Derived)
Inheritance
Abstract vs. Concrete Class

7. Generalization Hierarchy

8. Generalization Hierarchy
How many super classes are there?
Are there any mistakes in the identification of abstract & concrete classes?

9. Whole-Part Hierarchies
“has-a”
Aggregation
removable parts
can exist separately
e.g. computer & its parts
“has-a”
Composition
non-removable parts
stronger
cannot exist separately
Tire
Engine
Car
Person
Leg
Hand

10. Summary How many super classes are there?
How many sub classes are there?
What type of class is Account?
What type of classes are Savings & Checking Account?
What type of class is Transaction?

11. Summary How many super classes are there?
How many sub classes are there?
Is there an Association Class?
What does 0..2 mean?