All imported events from the given icalendar source get marked with the given “Tag”. If you make another import with the specified “Tag”, all events which were marked with this “Tag” and got deleted in the calendar source will also be deleted from your calendar.
If you use the “Tag” feature in a calendar not managed by iCal Import/Export a calendar called “iCal Import/Export Tag holder” will be created. This calendar is used to store the tag reference to the original events.
Posted in: Import