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Status: Verified (17)

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 GROUP
Area Assignment: app

Errata ID: 1002
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Julian Reschke
Date Reported: 2007-07-14
Verifier Name: Alexey Melnikov
Date Verified: 2010-05-11

Section 5.3.1 says:

      (DAV:needs-privilege): The DAV:bind privilege MUST be granted to
               ^          ^
      the current user on the parent collection of the Request-URI.

It should say:

      (DAV:need-privileges): The DAV:bind privilege MUST be granted to
               ^         ^
      the current user on the parent collection of the Request-URI.

Notes:

As per RFC 3744.

Errata ID: 1476
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Filip Navara
Date Reported: 2008-07-20
Verifier Name: Alexey Melnikov
Date Verified: 2010-05-11

Section 7.8.10. says:

   <D:error>
     <C:supported-filter>
       <C:prop-filter name="X-ABC-GUID"/>
     </C:supported-filter>
   </D:error>

It should say:

   <D:error xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">
     <C:supported-filter>
       <C:prop-filter name="X-ABC-GUID"/>
     </C:supported-filter>
   </D:error>

Notes:

Proper namespace declarations should be returned in the XML response.

Errata ID: 4161
Status: Verified
Type: Technical
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:

           <D:getetag>"fffff-abcd5"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VTODO
   DTSTAMP:20060205T235300Z
   DUE;VALUE=DATE:20060106
   LAST-MODIFIED:20060205T235308Z
   SEQUENCE:1
   STATUS:NEEDS-ACTION
   SUMMARY:Task #2
   UID:E10BA47467C5C69BB74E8720@example.com
   BEGIN:VALARM
   ACTION:AUDIO
   TRIGGER;RELATED=START:-PT10M
   END:VALARM
   END:VTODO
   END:VCALENDAR
   </C:calendar-data>

It should say:

           <D:getetag>"fffff-abcd5"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VTIMEZONE
   LAST-MODIFIED:20040110T032845Z
   TZID:US/Eastern
   BEGIN:DAYLIGHT
   DTSTART:20000404T020000
   RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4
   TZNAME:EDT
   TZOFFSETFROM:-0500
   TZOFFSETTO:-0400
   END:DAYLIGHT
   BEGIN:STANDARD
   DTSTART:20001026T020000
   RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
   TZNAME:EST
   TZOFFSETFROM:-0400
   TZOFFSETTO:-0500
   END:STANDARD
   END:VTIMEZONE
   BEGIN:VTODO
   DTSTAMP:20060205T235300Z
   DUE;TZID=US/Eastern:20060106T120000
   LAST-MODIFIED:20060205T235308Z
   SEQUENCE:1
   STATUS:NEEDS-ACTION
   SUMMARY:Task #2
   UID:E10BA47467C5C69BB74E8720@example.com
   BEGIN:VALARM
   ACTION:AUDIO
   TRIGGER;RELATED=END:-PT10M
   END:VALARM
   END:VTODO
   END:VCALENDAR
   </C:calendar-data>

Notes:

1. DUE VTODO component property in abcd5.ics is using TZID=US/Eastern and response needs VTIMEZONE component.

2. RELATED is not START but END, because VTODO has only DUE property.

Errata ID: 4153
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 7.8.1 says:

       <D:href>http://cal.example.com/bernard/work/abcd3.ics</D:href>
       <D:propstat>
         <D:prop>
           <D:getetag>"fffff-abcd3"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VTIMEZONE
   LAST-MODIFIED:20040110T032845Z
   TZID:US/Eastern

It should say:

       <D:href>http://cal.example.com/bernard/work/abcd3.ics</D:href>
       <D:propstat>
         <D:prop>
           <D:getetag>"fffff-abcd3"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   BEGIN:VTIMEZONE
   LAST-MODIFIED:20040110T032845Z
   TZID:US/Eastern

Notes:

Remove the PRODID property in abcd3.ics, which was not selected by C:calendar-date/C:comp[@name="VCALENDAR"]/*

Errata ID: 4154
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 7.8.5 says:

   <D:multistatus xmlns:D="DAV:"
                  xmlns:C="urn:ietf:params:xml:ns:caldav">
     <D:response>
       <D:href>http://cal.example.com/bernard/work/abcd4.ics</D:href>
       <D:propstat>
         <D:prop>
           <D:getetag>"fffff-abcd5"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR

It should say:

   <D:multistatus xmlns:D="DAV:"
                  xmlns:C="urn:ietf:params:xml:ns:caldav">
     <D:response>
       <D:href>http://cal.example.com/bernard/work/abcd5.ics</D:href>
       <D:propstat>
         <D:prop>
           <D:getetag>"fffff-abcd5"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR

Notes:

Typo in D:href

Errata ID: 4155
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 7.8.3 says:

           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VEVENT
   DTSTAMP:20060206T001121Z
   DTSTART:20060103T170000
   DURATION:PT1H
   RECURRENCE-ID:20060103T170000
   SUMMARY:Event #2
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   BEGIN:VEVENT
   DTSTAMP:20060206T001121Z
   DTSTART:20060104T190000
   DURATION:PT1H
   RECURRENCE-ID:20060104T170000
   SUMMARY:Event #2 bis
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   END:VCALENDAR
   </C:calendar-data>

It should say:

           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VEVENT
   DTSTAMP:20060206T001121Z
   DTSTART:20060103T170000Z
   DURATION:PT1H
   RECURRENCE-ID:20060103T170000Z
   SUMMARY:Event #2
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   BEGIN:VEVENT
   DTSTAMP:20060206T001121Z
   DTSTART:20060104T190000Z
   DURATION:PT1H
   RECURRENCE-ID:20060104T170000Z
   SUMMARY:Event #2 bis
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   END:VCALENDAR
   </C:calendar-data>

Notes:

9.6.5 says:
Date and local
time with reference to time zone information MUST be converted
into date with UTC time.

Errata ID: 4156
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 7.8.3 says:

           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VEVENT
   ATTENDEE;PARTSTAT=ACCEPTED;ROLE=CHAIR:mailto:cyrus@example.com
   ATTENDEE;PARTSTAT=NEEDS-ACTION:mailto:lisa@example.com
   DTSTAMP:20060206T001220Z
   DTSTART:20060104T150000
   DURATION:PT1H
   LAST-MODIFIED:20060206T001330Z
   ORGANIZER:mailto:cyrus@example.com
   SEQUENCE:1
   STATUS:TENTATIVE
   SUMMARY:Event #3
   UID:DC6C50A017428C5216A2F1CD@example.com
   X-ABC-GUID:E1CX5Dr-0007ym-Hz@example.com
   END:VEVENT
   END:VCALENDAR
   </C:calendar-data>

It should say:

           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VEVENT
   ATTENDEE;PARTSTAT=ACCEPTED;ROLE=CHAIR:mailto:cyrus@example.com
   ATTENDEE;PARTSTAT=NEEDS-ACTION:mailto:lisa@example.com
   DTSTAMP:20060206T001220Z
   DTSTART:20060104T150000Z
   DURATION:PT1H
   LAST-MODIFIED:20060206T001330Z
   ORGANIZER:mailto:cyrus@example.com
   SEQUENCE:1
   STATUS:TENTATIVE
   SUMMARY:Event #3
   UID:DC6C50A017428C5216A2F1CD@example.com
   X-ABC-GUID:E1CX5Dr-0007ym-Hz@example.com
   END:VEVENT
   END:VCALENDAR
   </C:calendar-data>

Notes:

9.6.5 says:
Date and local
time with reference to time zone information MUST be converted
into date with UTC time.

Errata ID: 4157
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 7.8.4 says:

           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VFREEBUSY
   ORGANIZER;CN="Bernard Desruisseaux":mailto:bernard@example.com
   UID:76ef34-54a3d2@example.com
   DTSTAMP:20050530T123421Z
   DTSTART:20060101T100000Z
   DTEND:20060108T100000Z
   FREEBUSY;FBTYPE=BUSY-TENTATIVE:20060102T100000Z/20060102T120000Z
   END:VFREEBUSY
   END:VCALENDAR
   </C:calendar-data>

It should say:

           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VFREEBUSY
   ORGANIZER;CN="Bernard Desruisseaux":mailto:bernard@example.com
   UID:76ef34-54a3d2@example.com
   DTSTAMP:20050530T123421Z
   DTSTART:20060101T000000Z
   DTEND:20060108T000000Z
   FREEBUSY;FBTYPE=BUSY-TENTATIVE:20060102T100000Z/20060102T120000Z
   END:VFREEBUSY
   END:VCALENDAR
   </C:calendar-data>

Notes:

Typo in DTSTART, DTEND property.

Errata ID: 4158
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 7.8.5 says:

     <D:response>
       <D:href>http://cal.example.com/bernard/work/abcd4.ics</D:href>
       <D:propstat>
         <D:prop>
           <D:getetag>"fffff-abcd4"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR

It should say:

     <D:response>
       <D:href>http://cal.example.com/bernard/work/abcd5.ics</D:href>
       <D:propstat>
         <D:prop>
           <D:getetag>"fffff-abcd5"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR

Notes:

Typo in D:href and D:getetag. "Task #2" is abcd5.ics.

Errata ID: 4159
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 7.8.5 says:

   BEGIN:VTODO
   DTSTAMP:20060205T235300Z
   DUE;TZID=US/Eastern:20060106T120000
   LAST-MODIFIED:20060205T235308Z
   SEQUENCE:1
   STATUS:NEEDS-ACTION
   SUMMARY:Task #2
   UID:E10BA47467C5C69BB74E8720@example.com
   BEGIN:VALARM
   ACTION:AUDIO
   TRIGGER;RELATED=START:-PT10M
   END:VALARM
   END:VTODO

It should say:

   BEGIN:VTODO
   DTSTAMP:20060205T235300Z
   DUE;TZID=US/Eastern:20060106T120000
   LAST-MODIFIED:20060205T235308Z
   SEQUENCE:1
   STATUS:NEEDS-ACTION
   SUMMARY:Task #2
   UID:E10BA47467C5C69BB74E8720@example.com
   BEGIN:VALARM
   ACTION:AUDIO
   TRIGGER;RELATED=END:-PT10M
   END:VALARM
   END:VTODO

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.

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.

Errata ID: 4162
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 7.10.1 says:

   <?xml version="1.0" encoding="utf-8" ?>
   <C:free-busy-query xmlns:C="urn:ietf:params:xml:ns:caldav">
     <C:time-range start="20060104T140000Z"
                     end="20060105T220000Z"/>
   </C:free-busy-query>

It should say:

   <?xml version="1.0" encoding="utf-8" ?>
   <C:free-busy-query xmlns:C="urn:ietf:params:xml:ns:caldav">
     <C:time-range start="20060104T140000Z"
                     end="20060104T220000Z"/>
   </C:free-busy-query>

Notes:

Typo in C:time-range/@end

Errata ID: 4163
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 7.10.1 says:

   BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Server//EN
   BEGIN:VFREEBUSY
   DTSTAMP:20050125T090000Z
   DTSTART:20060104T140000Z
   DTEND:20060105T220000Z
   FREEBUSY;FBTYPE=BUSY-TENTATIVE:20060104T150000Z/PT1H
   FREEBUSY:20060104T190000Z/PT1H
   END:VFREEBUSY
   END:VCALENDAR

It should say:

   BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Server//EN
   BEGIN:VFREEBUSY
   DTSTAMP:20050125T090000Z
   DTSTART:20060104T140000Z
   DTEND:20060104T220000Z
   FREEBUSY;FBTYPE=BUSY-TENTATIVE:20060104T150000Z/PT1H
   FREEBUSY:20060104T190000Z/PT1H
   END:VFREEBUSY
   END:VCALENDAR

Notes:

Typo in DTEND.

Errata ID: 4164
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 Appendix B says:

   BEGIN:VEVENT
   DTSTAMP:20060206T001121Z
   DTSTART;TZID=US/Eastern:20060104T140000
   DURATION:PT1H
   RECURRENCE-ID;TZID=US/Eastern:20060104T120000
   SUMMARY:Event #2 bis
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   END:VCALENDAR

It should say:

   BEGIN:VEVENT
   DTSTAMP:20060206T001121Z
   DTSTART;TZID=US/Eastern:20060104T140000
   DURATION:PT1H
   RECURRENCE-ID;TZID=US/Eastern:20060104T120000
   SUMMARY:Event #2 bis
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   BEGIN:VEVENT
   DTSTAMP:20060206T001121Z
   DTSTART;TZID=US/Eastern:20060106T140000
   DURATION:PT1H
   RECURRENCE-ID;TZID=US/Eastern:20060106T120000
   SUMMARY:Event #2 bis bis
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   END:VCALENDAR

Notes:

"Event #2 bis bis" seems to be required.

Errata ID: 4165
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 Appendix B says:

   STATUS:TENTATIVE
   SUMMARY:Event #3
   UID:DC6C50A017428C5216A2F1CD@example.com
   END:VEVENT
   END:VCALENDAR

It should say:

   STATUS:TENTATIVE
   SUMMARY:Event #3
   UID:DC6C50A017428C5216A2F1CD@example.com
   X-ABC-GUID:E1CX5Dr-0007ym-Hz@example.com
   END:VEVENT
   END:VCALENDAR

Notes:

abcd3.ics seems to have X-ABC-GUID property.

Errata ID: 4166
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 Appendix B says:

   TRIGGER;RELATED=START:-PT10M

It should say:

   TRIGGER;RELATED=END:-PT10M

Notes:

abcd4.ics RELATED parameter is not START but END, because TODO has only DUE property.

Errata ID: 4167
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 Appendix B says:

           <D:getetag>"fffff-abcd5"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VTODO
   DTSTAMP:20060205T235300Z
   DUE;VALUE=DATE:20060106
   LAST-MODIFIED:20060205T235308Z
   SEQUENCE:1
   STATUS:NEEDS-ACTION
   SUMMARY:Task #2
   UID:E10BA47467C5C69BB74E8720@example.com
   BEGIN:VALARM
   ACTION:AUDIO
   TRIGGER;RELATED=START:-PT10M
   END:VALARM
   END:VTODO
   END:VCALENDAR
   </C:calendar-data>

It should say:

           <D:getetag>"fffff-abcd5"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VTIMEZONE
   LAST-MODIFIED:20040110T032845Z
   TZID:US/Eastern
   BEGIN:DAYLIGHT
   DTSTART:20000404T020000
   RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4
   TZNAME:EDT
   TZOFFSETFROM:-0500
   TZOFFSETTO:-0400
   END:DAYLIGHT
   BEGIN:STANDARD
   DTSTART:20001026T020000
   RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
   TZNAME:EST
   TZOFFSETFROM:-0400
   TZOFFSETTO:-0500
   END:STANDARD
   END:VTIMEZONE
   BEGIN:VTODO
   DTSTAMP:20060205T235300Z
   DUE;TZID=US/Eastern:20060106T120000
   LAST-MODIFIED:20060205T235308Z
   SEQUENCE:1
   STATUS:NEEDS-ACTION
   SUMMARY:Task #2
   UID:E10BA47467C5C69BB74E8720@example.com
   BEGIN:VALARM
   ACTION:AUDIO
   TRIGGER;RELATED=END:-PT10M
   END:VALARM
   END:VTODO
   END:VCALENDAR
   </C:calendar-data>

Notes:

1. "Task #2" seems to be intended to show DUE with US/Eastern timezone, because "Task #1" is DATE.

2. RELATED would be not START, but END.

Status: Reported (3)

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 GROUP
Area Assignment: app

Errata ID: 4840
Status: Reported
Type: Technical
Publication Format(s) : TEXT

Reported By: Ricki Hirner
Date Reported: 2016-10-25

Section 5.3.4 says:

A response to a GET request targeted at a calendar object resource
MUST contain an ETag response header field indicating the current
value of the strong entity tag of the calendar object resource.

It should say:

A response to a GET request targeted at a calendar object resource
MUST contain an ETag response header field indicating the current
value of the strong entity tag of the calendar object resource.

Note that using another content coding (Content-Encoding) than
"identity" (for instance, when a compressed version of the resource
is sent) will cause the ETag reported by GET to change and make it
unusable for If-Match etc.

Notes:

Content-Encoding (in opposite to Transfer-Encoding) changes strong ETags, see RFC 7232 2.3.3 for an example. So if you GET a resource with another content coding than "identity" (for instance, "gzip"), the (strong) ETag could be "abc-gzip" instead of "abc". If you then send a conditional request (which requires a strong ETag) with If-Match: "abc-gzip", it may not work as expected. The solution seems to be to use Transfer-Encoding whenever possible.

Errata ID: 5481
Status: Reported
Type: Technical
Publication Format(s) : TEXT

Reported By: Stefanie Schirmer
Date Reported: 2018-08-27

Section 7.8.5 says:

>> Response <<

   HTTP/1.1 207 Multi-Status
   Date: Sat, 11 Nov 2006 09:32:12 GMT
   Content-Type: application/xml; charset="utf-8"
   Content-Length: xxxx

   <?xml version="1.0" encoding="utf-8" ?>
   <D:multistatus xmlns:D="DAV:"
                  xmlns:C="urn:ietf:params:xml:ns:caldav">
     <D:response>
       <D:href>http://cal.example.com/bernard/work/abcd4.ics</D:href>
       <D:propstat>
         <D:prop>
           <D:getetag>"fffff-abcd4"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VTODO
   DTSTAMP:20060205T235300Z
   DUE;TZID=US/Eastern:20060106T120000
   LAST-MODIFIED:20060205T235308Z
   SEQUENCE:1
   STATUS:NEEDS-ACTION
   SUMMARY:Task #2
   UID:E10BA47467C5C69BB74E8720@example.com
   BEGIN:VALARM
   ACTION:AUDIO
   TRIGGER;RELATED=START:-PT10M
   END:VALARM
   END:VTODO
   END:VCALENDAR
   </C:calendar-data>
         </D:prop>
         <D:status>HTTP/1.1 200 OK</D:status>
       </D:propstat>
     </D:response>
   </D:multistatus>

It should say:

>> Response <<

   HTTP/1.1 207 Multi-Status
   Date: Sat, 11 Nov 2006 09:32:12 GMT
   Content-Type: application/xml; charset="utf-8"
   Content-Length: xxxx

   <?xml version="1.0" encoding="utf-8" ?>
   <D:multistatus xmlns:D="DAV:"
                  xmlns:C="urn:ietf:params:xml:ns:caldav">
     <D:response>
       <D:href>http://cal.example.com/bernard/work/abcd5.ics</D:href>
       <D:propstat>
         <D:prop>
           <D:getetag>"fffff-abcd5"</D:getetag>
           <C:calendar-data>BEGIN:VCALENDAR
   VERSION:2.0
   PRODID:-//Example Corp.//CalDAV Client//EN
   BEGIN:VTIMEZONE
   LAST-MODIFIED:20040110T032845Z
   TZID:US/Eastern
   BEGIN:DAYLIGHT
   DTSTART:20000404T020000
   RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4
   TZNAME:EDT
   TZOFFSETFROM:-0500
   TZOFFSETTO:-0400
   END:DAYLIGHT
   BEGIN:STANDARD
   DTSTART:20001026T020000
   RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
   TZNAME:EST
   TZOFFSETFROM:-0400
   TZOFFSETTO:-0500
   END:STANDARD
   END:VTIMEZONE
   BEGIN:VTODO
   DTSTAMP:20060205T235300Z
   DUE;TZID=US/Eastern:20060106T120000
   LAST-MODIFIED:20060205T235308Z
   SEQUENCE:1
   STATUS:NEEDS-ACTION
   SUMMARY:Task #2
   UID:E10BA47467C5C69BB74E8720@example.com
   BEGIN:VALARM
   ACTION:AUDIO
   TRIGGER;RELATED=END:-PT10M
   END:VALARM
   END:VTODO
   END:VCALENDAR
   </C:calendar-data>
         </D:prop>
         <D:status>HTTP/1.1 200 OK</D:status>
       </D:propstat>
     </D:response>
   </D:multistatus>

Notes:

The timezone is missing from the response in Section 7.8.5.

This is probably related to the previous errata (Errata ID: 4154, Errata ID: 4158, Errata ID: 4159), which all corrected the result to return abcd5.ics instead of abcd4.ics (which contains no timezone).

From rfc4791, Section 4.1.:

Calendar object resources contained in calendar collections MUST NOT
contain more than one type of calendar component (e.g., VEVENT,
VTODO, VJOURNAL, VFREEBUSY, etc.) with the exception of VTIMEZONE
components, which **MUST be specified for each unique TZID parameter
value specified in the iCalendar object.**

Errata ID: 5846
Status: Reported
Type: Technical
Publication Format(s) : TEXT

Reported By: Дилян Палаузов
Date Reported: 2019-08-25

Section 5.2.3 says:

Conformance:  This property MAY be defined on any calendar
 collection.  If defined, it MUST be protected and SHOULD NOT be
 returned by a PROPFIND DAV:allprop request (as defined in Section
 12.14.1 of [RFC2518]).

Description: ... Any attempt by the client to store calendar object
 resources with component types not listed in this property, if it
 exists, MUST result in an error, with the
 CALDAV:supported-calendar-component precondition (Section 5.3.2.1)
 being violated.  Since this property is protected, it cannot be
 changed by clients using a PROPPATCH request.  However, clients can
 initialize the value of this property when creating a new calendar
 collection with MKCALENDAR. 

It should say:

Conformance:  This property MAY be defined on any calendar
 collection.  If defined, it MAY be protected and SHOULD NOT be
 returned by a PROPFIND DAV:allprop request (as defined in Section
 12.14.1 of [RFC2518]).

Description: ... Any attempt by the client to store calendar object
 resource with component types not listed in this property, if it
 exists, MUST result in an error, with the
 CALDAV:supported-calendar-component precondition (Section 5.3.2.1)
 being violated.  Clients can initialize the value of this property
 when creating a new calendar collection with MKCALENDAR. …

Notes:

The protected status of supported-calendar-component-set is removed, so that CUAs can add component types to existing callendars, like VAVAILABILITY, which component types were not defined, when the calendar was created.

Status: Rejected (1)

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 GROUP
Area Assignment: app

Errata ID: 4152
Status: Rejected
Type: Editorial
Publication Format(s) : TEXT

Reported By: Hiroaki KAWAI
Date Reported: 2014-11-05
Rejected by: Barry Leiba
Date Rejected: 2015-02-06

Section 7.8.1 says:

   BEGIN:VEVENT
   DTSTART;TZID=US/Eastern:20060102T120000
   DURATION:PT1H
   RRULE:FREQ=DAILY;COUNT=5
   SUMMARY:Event #2
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   BEGIN:VEVENT
   DTSTART;TZID=US/Eastern:20060104T140000
   DURATION:PT1H
   RECURRENCE-ID;TZID=US/Eastern:20060104T120000
   SUMMARY:Event #2 bis
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   BEGIN:VEVENT
   DTSTART;TZID=US/Eastern:20060106T140000
   DURATION:PT1H
   RECURRENCE-ID;TZID=US/Eastern:20060106T120000
   SUMMARY:Event #2 bis bis
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   END:VCALENDAR

It should say:

   BEGIN:VEVENT
   DTSTART;TZID=US/Eastern:20060102T120000
   DURATION:PT1H
   RRULE:FREQ=DAILY;COUNT=5
   SUMMARY:Event #2
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   BEGIN:VEVENT
   DTSTART;TZID=US/Eastern:20060104T140000
   DURATION:PT1H
   RECURRENCE-ID;TZID=US/Eastern:20060104T120000
   SUMMARY:Event #2 bis
   UID:00959BC664CA650E933C892C@example.com
   END:VEVENT
   END:VCALENDAR

Notes:

Remove the last VEVENT component in abcd2.ics, because it is outside of the time-range.
--VERIFIER NOTES--
The query requests the return of an entire resource (including all overridden instances) for any resource that has at least one component overlapping the time range.

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