Indicates whether it is possible to further specialize an aggregation. An abstract aggregation is intended to be used by other aggregations. If true, the aggregation does not provide a complete declaration and can typically not be instantiated. Default value is public.Ī kind of association that has one of its end marked shared as kind of aggregation, meaning that it has a shared aggregation.ĭetermines where the aggregation appears within different namespaces within the overall model, and its accessibility. If the imported element does not have a visibility, it is possible to add visibility to the element import. The default visibility is the same as that of the imported element. Specifies the visibility of the imported PackageableElement within the importing Package. The keyword > is shown near the dashed arrow if the visibility is public otherwise, the keyword > is shown to indicate private visibility. It is also possible to control whether the imported element can be further imported.Īn element import is shown using a dashed arrow with an open arrowhead from the importing namespace to the imported element. The name of the packageable element or its alias is to be added to the namespace of the importing namespace. The mapping expression is optional and may be omitted if the precise relationship between the elements is not specified.Īn element import is defined as a directed relationship between an importing namespace and a packageable element. In other cases, such as Trace, it is usually informal and bidirectional. In some cases, such as Derivation, it is usually formal and unidirectional. In some cases (such as a Trace Abstraction) the assignment of direction (that is, the designation of the client element) is at the discretion of the modeler, and is a stipulation.ĭetermines where the abstraction relationship appears within different namespaces within the overall model, and its accessibility.Ī composition of an Expression that states the abstraction relationship between the supplier and the client. The element(s) dependent on the supplier element(s). Despite this convention, users of UML may stipulate a sense of dependency suitable for their domain, which makes a more abstract element dependent on that which is more specific. ![]() In some directed dependency relationships (such as Refinement Abstractions), a common convention in the domain of class-based OO software is to put the more abstract element in this role. The element(s) independent of the client element(s), in the same respect and the same dependency relationship. In the metamodel, an Abstraction is a Dependency in which there is a mapping between the supplier and the client. The Form Diagram allows you to generate diagram automatically with user-defined scope.Īn abstraction is a relationship that relates two elements or sets of elements that represent the same concept at different levels of abstraction or from different viewpoints. With the share model facilities, you can reuse your class model in the interaction diagram for modeling the detailed design of the dynamic behavior. It provides a wide variety of usages from modeling the domain-specific data structure to detailed design of the target system. Definition Class Diagram provides an overview of the target system by describing the objects and classes inside the system and the relationships between them.
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