클래스 간에 구조적 관계를 정의

Relationships between classes

Associations

composition / Aggregation

Generalization / Specialization

Static Modeling during Analysis

System Context Class Diagram

Depict external classes and system boundary

Static Modeling of Entity classes

Persistent classes that store data

Static Modeling

시스템의 정적 구조를 표현

information (Entity-Relationship) Modeling 기반

Category of external classes

external i/o device

external user

external system