BEGIN:VCALENDAR
PRODID:-//ACME/DesktopCalendar//EN
METHOD:REQUEST
X-LIC-NOTE: #I1. Reschedules C1
VERSION:2.0
BEGIN:VEVENT
ORGANIZER:Mailto:B@example.com
ATTENDEE;ROLE=CHAIR;PARTSTAT=ACCEPTED;CN=BIG A:Mailto:A@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL;CN=B:Mailto:B@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL;CN=C:Mailto:C@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL;CN=Hal:Mailto:D@example.com
ATTENDEE;RSVP=FALSE;CUTYPE=ROOM:conf_Big@example.com
ATTENDEE;ROLE=NON-PARTICIPANT;RSVP=FALSE:Mailto:E@example.com
DTSTAMP:19970611T190000Z
DTSTART:19970701T200000Z
DTEND:19970701T2000000Z
SUMMARY:Conference
UID:calsrv.example.com-873970198738777@example.com
SEQUENCE:2
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR

BEGIN:VCALENDAR
PRODID:-//ACME/DesktopCalendar//EN
METHOD:REQUEST
X-LIC-NOTE: #I2. Updates C1
VERSION:2.0
BEGIN:VEVENT
ORGANIZER:Mailto:B@example.com
ATTENDEE;ROLE=CHAIR;PARTSTAT=ACCEPTED;CN=BIG A:Mailto:A@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL;CN=B:Mailto:B@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL;CN=C:Mailto:C@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL;CN=Hal:Mailto:D@example.com
ATTENDEE;RSVP=FALSE;CUTYPE=ROOM:conf_Big@example.com
ATTENDEE;ROLE=NON-PARTICIPANT;RSVP=FALSE:Mailto:E@example.com
DTSTAMP:19970611T193000Z
DTSTART:19970701T190000Z
DTEND:19970701T1930000Z
SUMMARY: Pool party
UID:calsrv.example.com-873970198738777@example.com
SEQUENCE:2
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR

BEGIN:VCALENDAR
PRODID:-//ACME/DesktopCalendar//EN
METHOD:REQUEST
X-LIC-NOTE: #I2: This is an obsolete request\, otherwise identical to #I1
VERSION:2.0
BEGIN:VEVENT
ORGANIZER:Mailto:B@example.com
ATTENDEE;ROLE=CHAIR;PARTSTAT=ACCEPTED:Mailto:A@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL:Mailto:B@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL:Mailto:C@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL;CN=Hal:Mailto:D@example.com
ATTENDEE;ROLE=NON-PARTICIPANT;RSVP=FALSE;
 CUTYPE=ROOM:Mailto:Conf@example.com
ATTENDEE;ROLE=NON-PARTICIPANT;RSVP=FALSE:Mailto:E@example.com
DTSTART:19960701T180000Z
DTEND:19970701T190000Z
SUMMARY:Phone Conference
UID:calsrv.example.com-873970198738777@example.com
SEQUENCE:0
DTSTAMP:19960613T190000Z
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR

BEGIN:VCALENDAR
PRODID:-//ACME/DesktopCalendar//EN
METHOD:REPLY
X-LIC-NOTE: #I3: User B is accepting A's request\, #C2
VERSION:2.0
BEGIN:VEVENT
ATTENDEE;PARTSTAT=ACCEPTED:Mailto:B@example.com
ORGANIZER:MAILTO:A@example.com
UID:calsrv.example.com-873970198738785@example.com
SEQUENCE:1
REQUEST-STATUS:2.0;Success
DTSTAMP:19970612T190000Z
END:VEVENT
END:VCALENDAR

BEGIN:VCALENDAR
PRODID:-//ACME/DesktopCalendar//EN
METHOD:REPLY
X-LIC-NOTE: #I4: User C is rejecting A's request\, #C2
VERSION:2.0
BEGIN:VEVENT
ATTENDEE;PARTSTAT=DECLINED:Mailto:C@example.com
ORGANIZER:MAILTO:A@example.com
UID:calsrv.example.com-873970198738785@example.com
SEQUENCE:1
REQUEST-STATUS:2.0;Success
DTSTAMP:19970612T190000Z
END:VEVENT
END:VCALENDAR

BEGIN:VCALENDAR
PRODID:-//ACME/DesktopCalendar//EN
METHOD:REPLY
X-LIC-NOTE: #I5: Crasher X is accepting A's request\, #C2
VERSION:2.0
BEGIN:VEVENT
ATTENDEE;PARTSTAT=ACCEPTED:Mailto:X@example.com
ORGANIZER:MAILTO:A@example.com
UID:calsrv.example.com-873970198738785@example.com
SEQUENCE:1
REQUEST-STATUS:2.0;Success
DTSTAMP:19970612T190000Z
END:VEVENT
END:VCALENDAR

BEGIN:VCALENDAR
PRODID:-//ACME/DesktopCalendar//EN
METHOD:REPLY
X-LIC-NOTE: #I6: Crasher Y is declining  A's request\, #C2
VERSION:2.0
BEGIN:VEVENT
ATTENDEE;PARTSTAT=DECLINED:Mailto:Y@example.com
ORGANIZER:MAILTO:A@example.com
UID:calsrv.example.com-873970198738785@example.com
SEQUENCE:1
REQUEST-STATUS:2.0;Success
DTSTAMP:19970612T190000Z
END:VEVENT
END:VCALENDAR

BEGIN:VCALENDAR
PRODID:-//ACME/DesktopCalendar//EN
METHOD:CANCEL
X-LIC-NOTE: #I7: Cancel #c1
VERSION:2.0
BEGIN:VEVENT
ORGANIZER:Mailto:B@example.com
ATTENDEE;CUTYPE=INDIVIDUAL:Mailto:A@example.com
ATTENDEE;CUTYPE=INDIVIDUAL:Mailto:B@example.com
ATTENDEE;CUTYPE=INDIVIDUAL:Mailto:C@example.com
ATTENDEE;CUTYPE=INDIVIDUAL:Mailto:D@example.com
COMMENT:Mr. B cannot attend. It's raining. Lets cancel.
UID:calsrv.example.com-873970198738777@example.com
SEQUENCE:1
UID:calsrv.example.com-873970198738777@example.com
STATUS:CANCELLED
DTSTAMP:19970613T190000Z
END:VEVENT
END:VCALENDAR

BEGIN:VCALENDAR
PRODID:-//ACME/DesktopCalendar//EN
METHOD:COUNTER
X-LIC-NOTE: #I8. Counter to #C1. Changed DTEND to DURATION.
VERSION:2.0
BEGIN:VEVENT
DTSTAMP:19970611T190000Z
DTSTART:19970701T190000Z
DURATION:PT2H
ORGANIZER:Mailto:B@example.com
ATTENDEE;RSVP=TRUE;CUTYPE=INDIVIDUAL;CN=C:Mailto:C@example.com
SUMMARY:Conference
COMMENT: I think the conference should be 2 hours long
UID:calsrv.example.com-873970198738777@example.com
SEQUENCE:1
END:VEVENT
END:VCALENDAR