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An actor [1] in the Unified Modeling Language (UML) "specifies a role played by a user or any other system that interacts with the subject." [ 1 ] "An Actor models a type of role played by an entity that interacts with the subject (e.g., by exchanging signals and data), but which is external to the subject."
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
Fig.11 Aggregation Fig.12 Example aggregation. Sometimes the needs exist to assign properties to concepts. Properties are written in lower case, under the concept name, as is illustrated in Figure 11. In Figure 12 an example of a concept with properties is visualized. The concept FEATURE has four properties, respectively: priority, type, risk ...
Object composition using UML properties to compose objects. In UML modeling, objects can be conceptually composed, independently of the implementation with a programming language. There are four ways of composing objects in UML: property, association, aggregation and composition: [4] A property represents an attribute of the class.
In software engineering, a class diagram [1] in the Unified Modeling Language (UML) is a type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, operations (or methods), and the relationships among objects.
Use case diagrams are used to identify the actor (users or other systems) and the processes they perform. System sequence diagram : A system sequence diagram (SSD) is a picture that shows, for a particular scenario of a use case, the events that external actors generate, their order, and possible inter-system events.
UML diagram of a simple association between two classes. This is an update of KP-UML-Aggregation-20060325.svg of Karl Pietrzak. Author: Kaspar Thommen. File usage.