RFC Errata
RFC 4791, "Calendaring Extensions to WebDAV (CalDAV)", March 2007
Note: This RFC has been updated by RFC 5689, RFC 6638, RFC 6764, RFC 7809, RFC 7953, RFC 8996
Source of RFC: IETF - NON WORKING GROUPArea Assignment: app
See Also: RFC 4791 w/ inline errata
Errata ID: 4160
Status: Verified
Type: Editorial
Publication Format(s) : TEXT
Reported By: Hiroaki KAWAI
Date Reported: 2014-11-05
Verifier Name: Barry Leiba
Date Verified: 2015-02-06
Section 7.8.9 says:
<C:calendar-data>BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Example Corp.//CalDAV Client//EN BEGIN:VTODO DTSTAMP:20060205T235335Z DUE;VALUE=DATE:20060104 STATUS:NEEDS-ACTION SUMMARY:Task #1 UID:DDDEEB7915FA61233B861457@example.com BEGIN:VALARM ACTION:AUDIO TRIGGER;RELATED=START:-PT10M END:VALARM END:VTODO END:VCALENDAR </C:calendar-data>
It should say:
<C:calendar-data>BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Example Corp.//CalDAV Client//EN BEGIN:VTODO DTSTAMP:20060205T235335Z DUE;VALUE=DATE:20060104 STATUS:NEEDS-ACTION SUMMARY:Task #1 UID:DDDEEB7915FA61233B861457@example.com BEGIN:VALARM ACTION:AUDIO TRIGGER;RELATED=END:-PT10M END:VALARM END:VTODO END:VCALENDAR </C:calendar-data>
Notes:
RELATED is not START but END.
Both rfc2445 section4.8.6.3 and rfc5545 section3.8.6.3 says:
If the trigger is set relative to START, then the "DTSTART"
property MUST be present in the associated "VEVENT" or "VTODO"
calendar component. If an alarm is specified for an event with
the trigger set relative to the END, then the "DTEND" property or
the "DTSTART" and "DURATION " properties MUST be present in the
associated "VEVENT" calendar component. If the alarm is specified
for a to-do with a trigger set relative to the END, then either
the "DUE" property or the "DTSTART" and "DURATION " properties
MUST be present in the associated "VTODO" calendar component.