![]() To answer the question "What is a class diagram in UML?" you should first understand its basic makeup.Ĭlasses: A template for creating objects and implementing behavior in a system. Additional class diagram componentsĭepending on the context, classes in a class diagram can represent the main objects, interactions in the application, or classes to be programmed. If you are familiar with basic OO theory, this isn't anything groundbreaking. There are two scopes for members: classifiers and instances.Ĭlassifiers are static members while instances are the specific instances of the class. Here are the access levels with their corresponding symbols: The operations describe how a class interacts with data.Īll classes have different access levels depending on the access modifier (visibility). Displayed in list format, each operation takes up its own line.
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