public enum RecurrenceModification
The last appointment in the series is included in a delete and the end date of the recurrence pattern needs to be modified.
After the delete, there will only be one appointment left in the series.
The first appointment in the series is deleted and not the rest. Start date needs to be modified.
There are no modifications to the recurrence rules (except for possible dates)
There is a modification on the recurrence pattern in the series with more than one appointments Earlier in the series. This means a new recurrence rule id and a new recurrence pattern.
There is a modification on the recurrence pattern on the second appointment in the series.
Stop recurring is carried out in the series with more than one appointment previously in the series. The recurrence end date for these appointments needs to be modified.
Stop recurrence is carried out on the first appointment in the series and the current appointment is no longer recurring.