Dunno if it will help, but I've done some stuff with ical4j, and had a
similar deal:

http://m2.modularity.net.au/projects/ical4j/apidocs/index.html

The text you're after may be:

The full range of calendar components specified by a recurrence set
        is referenced by referring to just the "UID" property value
        corresponding to the calendar component. The "RECURRENCE-ID" property
        allows the reference to an individual instance within the recurrence
        set.

HIH,
:Denny

-- 
Any commander who fails to exceed his authority is not of much use to
his subordinates.
Arleigh Burke

On Thu, Dec 4, 2008 at 2:42 PM, Dawson, Michael wrote:
> In Exchange 2003, recurring events produce the same UID for each
> instance of the event.  Even though each instance's start time is
> different, the UID is still the same.  Therefore, it is impossible to
> uniquely identify a calendar item using only the UID.
>
> An example of the UID is:
> 040000008200E00074C5B7101A82E0080000000000C87FBB1756C9010000000000000000
> 100000005DC8DACAED81684E92730F6ED8C598BD
>
> I created a sample, recurring event and this is the data that is
> returned from Exchange, via CFEXCHANGECALENDAR:
>
> UID: 040000008200<snip>6ED8C598BD - STARTTIME: 2008-12-05 12:00:00.000
> UID: 040000008200<snip>6ED8C598BD - STARTTIME: 2008-12-12 12:00:00.000
> UID: 040000008200<snip>6ED8C598BD - STARTTIME: 2008-12-19 12:00:00.000
>
> Given this example, how would I refer to the item on 2008-12-12?
>
> From my testing, the natural key would be a combination of UID +
> STARTTIME.
>
> Has anyone else run into this issue?  If so, what did you do to
> workaround it?
>
> Thanks
> Mike
>
>
> 

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