vCalendar and iCalendar support private software extensions, with a X-
prefix, a number of which are in common usage these days. This release bring in the next X-
prefix variables into iCalendarkit.
X-MICROSOFT-CDO-ALLDAYEVENT
in ICalendarEventX-MICROSOFT-CDO-BUSYSTATUS
in ICalendarEventX-MICROSOFT-CDO-INTENDEDSTATUS
in ICalendarEventX-MICROSOFT-CDO-IMPORTANCE
in ICalendarEventX-WR-CALNAME
in ICalendarX-WR-CALDESC
in ICalendarX-WR-RELCALID
in ICalendarX-PUBLISHED-TTL
in ICalendar