type
forSome
Vcalendar
Vevent
Vtimezone
Vtodo
action
attendee
byday
bymonth
calscale
categories
class
cn
cutype
date
daylight
description
dtend
dtstamp
dtstart
duration
freq
interval
language
location
organizer
partstat
percentComplete
priority
prodid
related
role
rrule
rsvp
sequence
standard
status
summary
transp
trigger
tzid
tzname
tzoffsetfrom
tzoffsetto
uid
valarm
value
version