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Download QR code; In other projects ... UML diagram of a simple association between two classes. This is an update of KP-UML-Aggregation-20060325.svg of Karl Pietrzak ...
The diagram on top shows Composition between two classes: A Car has exactly one Carburetor, and a Carburetor is a part of one Car. Carburetors cannot exist as separate parts, detached from a specific car. The diagram on bottom shows Aggregation between two classes: A Pond has zero or more Ducks, and a Duck has at most one Pond (at a time).
Examples of predefined UML stereotypes are Actor, Exception, Powertype and Utility. Structure diagram; Superstate - construct allowing several States which share common Transitions and Internal Activities; Swim lane - synonym for Partition; System model - The logical UML model being represented through one or more UML diagrams
Download as PDF; Printable version; In other projects Appearance. move to sidebar hide ... This is the template sandbox page for Template:Unified Modeling Language
UML class diagram Composition and aggregation. In object-oriented programming this relationship can be represented with a Unified Modeling Language Class diagram. This has-a relationship is also known as composition. As you can see from the Class Diagram on the right a car "has-a" carburetor, or a car is "composed
In aggregation, the object may only contain a reference or pointer to the object (and not have lifetime responsibility for it). Sometimes aggregation is referred to as composition when the distinction between ordinary composition and aggregation is unimportant. The above code would transform into the following UML Class diagram:
UML diagram types; Structural UML diagrams; Class diagram; Component diagram; Composite structure diagram; Deployment diagram; Object diagram; Package diagram; Profile diagram; Behavioral UML diagrams; Activity diagram; Communication diagram; Interaction overview diagram; Sequence diagram; State diagram; Timing diagram; Use case diagram