BEGIN:VCALENDAR
DURATION:P15DT5H0M20S
DURATION:P7W
URL;CN=John Smith:http://example.com/urivalue.html
X-SKI-TITLE;RSVP=TRUE: This is an extension property
SUMMARY:"No Property"
SUMMARY;RSVP=TRUE;RSVP=FALSE:Calendaring Interoperability Planning Meeting
SUMMARY;ALTREP=This is an xname:altrep
SUMMARY;CUTYPE=DESCRIPTION is a keyword:Xname parameter
DTEND:19990605
DTSTART:19990605T103012
CATEGORIES;RSVP=TRUE;RSVP=FALSE:one,two
END:VCALENDAR