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UML
Michael Held edited this page Nov 21, 2020
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It's not a UML book or guide. It's just a place with some explanation that helps to understand design patterns.
1. Realization. Realization is a relationship between the interface and the implementing class.
2. Inheritance. Represents an "is-a" relationship.
3. Aggregation. A special type of association. Objects of Class1 and Class2 have separate lifetimes.
4. Composition. A special type of aggregation. Objects of Class2 live and die with Class1.