UML Articles

UML Class Diagram Relationships and Symbols

UML Class Diagram Relationships and Symbols

1. Inheritance  
Inheritance
B inherits from A.
2. Realization
Realization
B implements A.
3. Association
Association
A and B call and access each other’s elements.
4. Association (one way)
Association-One Way
A can call and access B’s elements, but not vice versa.
5. Aggregation
Association
A has a B, and B can outlive A.
6. Composition
A has a B, and B depends on A.

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