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Unified Modeling Language Reference Manual, The, Second Edition by Grady Booch, Ivar Jacobson, James Rumbaugh

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package

A general-purpose mechanism for organizing elements into groups, establishing ownership of elements, and providing unique names for referencing elements.

See also access, dependency, import, model, namespace, subsystem.

Semantics

A package is a grouping of model elements and diagrams. Every model element that is not part of another model element must be declared within exactly one namespace; the namespace containing the declaration of an element is said to own the element. A package is a general-purpose namespace that can own any kind of model element that is not restricted to a particular kind of element. A package may contain nested packages and ordinary model elements. Usually there is a single root package that owns the entire model ...

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