What is the special feature of events with the Link event event definition?

Events of the Link type enable you to link processes within BPMN process diagrams. A link can be created by using the occurrence of an event of the Link type as the source event and another occurrence of the event as the target event. This modeling technique is also supported by the simulation. When a process folder reaches an event of the Link type without an outgoing sequence flow, it is forwarded to the associated event without an incoming sequence flow.

Events of the Link type that have both an incoming and an outgoing sequence flow are considered to be invalid and they block process folders. The source and target event must both belong to the same pool, have the same process level, and be in the same model.