Receipt Signal   A receipt signal is a type of state that represents the receipt of a signal on an activity diagram. The state does not have actions or internal transitions. It simply represents the receipt of the signal, which causes the outgoing transition to fire. A dashed arrow may be drawn from the object sending the signal to the receipt signal. The signal signature is written inside the pentagon.

Explanation

When a signal has been sent to an object it is necessary to receive a notification or signal back from the object. This is represented on an activity diagram by a pentagon, with a concave triangular notch. The pentagon is just another activity that doesn't do anything other than receive the signal and then transition to the next activity.

Related Entries

Sending Signal  Paired Element,  Graphically Similar A sending signal is related to a receipt signal as a paired element. A classifier sends (asynchronously) a package of information and another classifier receives the information signified by the receipt signal.