A condition or restriction expressed in natural language text or in a machine readable language for the purpose of declaring some of the semantics of an element.A kind of association that has one of its end marked shared as kind of aggregation, meaning that it has a shared aggregation.If a composite is deleted, all of its parts are normally deleted with it.Composite aggregation is a strong form of aggregation that requires a part instance be included in at most one composite at a time.More than one end of the association may have the same type. It has at least two ends represented by properties, each of which is connected to the type of the end.
An association specifies a semantic relationship that can occur between typed instances.A high-level, abstracted view of a component in UML 2 can be modeled as: In UML 2, a component is drawn as a rectangle with optional compartments stacked vertically. It is important to note that the internal components are surrounded by a large 'box' which can be the overall system itself (in which case there would not be a component symbol in the top right corner) or a subsystem or component of the overall system (in this case the 'box' is a component itself).Ī component represents a modular part of a system that encapsulates its contents and whose manifestation is replaceable within its environment.Those interfaces on the left are known as provided interface, which represents the services to deliver by the exhibiting component. The data then passes to and through several other components via various connections before it is output at the ports on the left.The interfaces on the right are known as required interfaces, which represents the services the component needed in order to carry out its duty. The data (account and inspection ID) flows into the component via the port on the right-hand side and is converted into a format the internal components can use.The example above shows the internal components of a larger component:
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