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Call Dependency
A call dependency connects an operation in one class, the source to an operation in another class, the target. The relationship may be made less precise by attaching either the source or target or both ends to the classes that contain the operations.
Explanation
This is a stereotyped dependency between operations in two classes. It has all of the general semantics of the dependency so the client operations can be said to rely or "depend" on the supplier operation. It adds granularity and a precision to a model, which is used rarely or in circumstances where this precision is warranted.
A usage is a related element because it is the base element for the call usage which is a stereotyped usage and a type of dependency. The call stereotype adds more precision to the less specific or standard usage relationship.
A dependency is a related element because it is the base element for the usage relationship. The call usage is a stereotyped usage which is a type of dependency. The usage stereotyped as call adds more precision to the less specific or standard dependency relationship.
