Chair sends out a 3 day recurring meeting that repeats Monday through Wednesday. Chair later changes the LOCATION for all the instances, but did not change the date, time, or duration. The receiver will note the SEQUENCE value has not changed, and can simply apply the other properties sent to the recurrence set. If the sender had changed the SEQUENCE value, the receiver could believe this to mean a date, time, or duration change, and attempt to apply a reschedule to the set when one did not occur.