In the following example, Bernard removes from his calendar the third recurrence instance of a daily recurring event he's been invited to by Cyrus. This is accomplished by the addition of an "EXDATE" property to the scheduling object resource stored by Bernard.
>> Request <<
PUT /home/bernard/calendars/work/4FD3AD926350.ics HTTP/1.1 Host: cal.example.com Content-Type: text/calendar; charset="utf-8" Content-Length: xxxx If-Schedule-Tag-Match: "488177c8-2ea7-4176-a6cb-fab8cfccdea2"
BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Example Corp.//CalDAV Client//EN BEGIN:VTIMEZONE TZID:America/Montreal BEGIN:STANDARD DTSTART:20071104T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 END:STANDARD BEGIN:DAYLIGHT DTSTART:20070311T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:9263504FD3AD SEQUENCE:0 DTSTAMP:20090602T185254Z DTSTART;TZID=America/Montreal:20090601T150000 DTEND;TZID=America/Montreal:20090601T160000 RRULE:FREQ=DAILY;INTERVAL=1;COUNT=5 EXDATE;TZID=America/Montreal:20090603T150000 TRANSP:OPAQUE SUMMARY:Review Internet-Draft ORGANIZER;CN="Cyrus Daboo":mailto:cyrus@example.com ATTENDEE;CN="Cyrus Daboo";CUTYPE=INDIVIDUAL;PARTSTAT=ACCEPTED: mailto:cyrus@example.com ATTENDEE;CN="Bernard Desruisseaux";CUTYPE=INDIVIDUAL;PARTSTAT= ACCEPTED;ROLE=REQ-PARTICIPANT;RSVP=TRUE:mailto:bernard@exampl e.net END:VEVENT BEGIN:VEVENT UID:9263504FD3AD SEQUENCE:0 DTSTAMP:20090603T183823Z RECURRENCE-ID;TZID=America/Montreal:20090602T150000 DTSTART;TZID=America/Montreal:20090602T150000 DTEND;TZID=America/Montreal:20090602T160000 TRANSP:TRANSPARENT SUMMARY:Review Internet-Draft ORGANIZER;CN="Cyrus Daboo":mailto:cyrus@example.com ATTENDEE;CN="Cyrus Daboo";CUTYPE=INDIVIDUAL;PARTSTAT=ACCEPTED: mailto:cyrus@example.com ATTENDEE;CN="Bernard Desruisseaux";CUTYPE=INDIVIDUAL;PARTSTAT= DECLINED;ROLE=REQ-PARTICIPANT;RSVP=TRUE:mailto:bernard@exampl e.net END:VEVENT END:VCALENDAR
Bernard's deletion of a recurrence instance will cause his server to deliver a scheduling message to Cyrus. Cyrus's client will find the following reply message from Bernard in Cyrus's scheduling Inbox collection:
>> Request <<
GET /home/cyrus/calendars/inbox/6504923FD3AD.ics HTTP/1.1 Host: cal.example.com
>> Response <<
HTTP/1.1 200 OK Date: Tue, 02 Jun 2009 18:52:58 GMT Last-Modified: Tue, 02 Jun 2009 18:52:58 GMT ETag: "eb897deabc8939589da116714bc99265" Content-Type: text/calendar; charset="utf-8" Content-Length: xxxx
BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Example Corp.//CalDAV Client//EN METHOD:REPLY BEGIN:VTIMEZONE TZID:America/Montreal BEGIN:STANDARD DTSTART:20071104T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 END:STANDARD BEGIN:DAYLIGHT DTSTART:20070311T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:9263504FD3AD SEQUENCE:0 DTSTAMP:20090603T183823Z RECURRENCE-ID;TZID=America/Montreal:20090603T150000 DTSTART;TZID=America/Montreal:20090603T150000 DTEND;TZID=America/Montreal:20090603T160000 SUMMARY:Review Internet-Draft ORGANIZER;CN="Cyrus Daboo":mailto:cyrus@example.com ATTENDEE;CN="Bernard Desruisseaux";PARTSTAT=DECLINED: mailto:bernard@example.net REQUEST-STATUS:2.0;Success END:VEVENT END:VCALENDAR