Forces the server to expand recurring components into individual recurrence instances.
The CALDAV given calendaring REPORT request, the server MUST expand the recurrence set into calendar components that define exactly one
recurrence instance, and MUST return only those whose scheduled time intersect a specified time range.
The "start" attribute specifies the inclusive start of the time range, and the "end" attribute specifies the non-inclusive end of the time range. Both attributes are specified as date with UTC time value. The value of the "end" attribute MUST be greater than the value of the "start" attribute.
The server MUST use the same logic as defined for CALDAV:time- range to determine if a recurrence instance intersects the specified time range.
Recurring components, other than the initial instance, MUST include a RECURRENCE-ID property indicating which instance they refer to.
The returned calendar components MUST NOT use recurrence properties (i.e., EXDATE, EXRULE, RDATE, and RRULE) and MUST NOT have reference to or include VTIMEZONE components. Date and local time with reference to time zone information MUST be converted into date with UTC time.
<!ELEMENT expand EMPTY>
<!ATTLIST expand start CDATA #REQUIRED end CDATA #REQUIRED> start value: an iCalendar "date with UTC time" end value: an iCalendar "date with UTC time"