VEN/VTN, EiEvent Service, oadrDistributeEvent Payload
An event with an overall duration of 0 indicates an event with no defined
end time and will remain active until explicitly canceled.
The current implementation doesn't comply, durations of 0 are taken literally, so in this point the event is marked as completed.
As per the documentation, conformance rule 47:
The current implementation doesn't comply, durations of 0 are taken literally, so in this point the event is marked as completed.