Class Diagram and Object Diagram

Describe the structure of a system with UML class diagram, composite structure diagram. Visualize instances of classes with object diagram.

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Class diagram

Class diagram sample shows classes, associations and generalizationsClass diagram sample shows classes, associations and generalizations

Class diagram is the most widely used diagram in modeling object-oriented system. A class diagram shows a set of classes, interfaces, associations and generalizations. Package is commonly used model element for organizing elements in class diagram. Class diagrams are not just for visualizing and documenting structure models but also for constructing executable system with forward, reverse and round-trip engineering. There is also a synchronization engine for generating and updating entity relationship diagram from class diagram.

Composite structure diagram

Composite structure diagramComposite structure diagram

Composite structure diagram visualizes the internal structure of a class or collaboration. Composite structure diagram is a kind of component diagram mainly used in modeling a system at micro point-of-view.

Object diagram

Object diagramObject diagram

Object diagram shows a snapshot of instances of things in class diagrams. Similar to class diagrams, object diagrams show the static design of system but from the real or prototypical perspective.

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