UML/BPMN Metamodel

Cancel Events are only used in the context of modeling Transaction Sub-Processes. There are two (2) variations: a catch Intermediate Event and an End Event.

• The catch Cancel Intermediate Event MUST only be attached to the boundary of a Transaction Sub-Process and, thus, MAY NOT be used in normal flow.
• The Cancel End Event MUST only be used within a Transaction Sub-Process and, thus, MAY NOT be used in any other type of Sub-Process or Process.