The scheduler can display appointments that occur only once (normal appointments) or repeat several times (recurring appointments), and can generate a series of occurrences by a pattern. If users change an occurrence appointment or delete it, the appointment type will change to changed occurrence or deleted occurrence respectively. The following image summarizes information about appointments and the list the available types:
Your data source should not contain common occurrences. The scheduler generates them automatically. But the data source should store deleted occurrences and changed occurrences to be able to restore changes.
The appointment item provides several properties that allow you to determine what the appointment type is. The table below lists their values for different appointment types: