Description A Signal Boundary Event can receive a Signal. In this context, it will change a normal flow into an exception flow upon being triggered. A Signal Event differs from an Error Event because it defines a more general, non-error condition for interrupting Activities, such as the successful completion of another Activity, and it has a larger scope than the Error Event does. Signal Boundary Event displays either of the following on a diagram: - A Signal Boundary Event name if the name is specified.
- A Signal Ref property value if the name is unspecified.
Notation - Signal Boundary Event (Cancel Activity - True)
 - Signal Boundary Event (Cancel Activity - False)
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