Appointment status
Depending on the status of the appointment, certain transactions are allowed and follow-up states for further processing are determined.

- Name and identifier of the status.
- This is what is displayed in the headline of the appointment in the schedule.
- Identifiers of the follow-up states that the appointment can be transferred to.
- The appointment can be modified if the flag is set.
- The appointmen can be deleted if the flag is set.
- If the flag isn't set, the appointment is only visible for the creator.
- The original appointments will be blanked out once they were postponed.
- No follow-ups are possible if the status is set to closed.