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Pin (from BasicActions ) on page 275
An input pin is a pin that holds input values to be consumed by an action.
No additional attributes
No additional associations
No additional constraints
An action cannot start execution if an input pin has fewer values than the lower multiplicity. The upper multiplicity determines
how many values are consumed by a single execution of the action.
No specific notation. See extensions in Activities.
InputPin is the same concept as in UML 1.5, but modeled independently of the behaviors that use it.