Internet Assigned Numbers Authority
iCalendar Element Registries
Created
2009-04-29
Last Updated
2023-12-06
Note
A Standards Track RFC is required for registration of iCalendar elements that
modify elements previously documented in a Standards Track RFC.
Available Formats
[IMG]
XML [IMG]
HTML [IMG]
Plain text
Registries included below
??Components
??Properties
??Parameters
??Value Data Types
??Calendar User Types
??Free/Busy Time Types
??Participation Statuses
??Relationship Types
??Participation Roles
??Actions
??Classifications
??Methods
??REQUEST-STATUS Values
??Schedule Agent Values Registry
??Schedule Force Send Values Registry
??Display Types
??Feature Types
??Participant Types
??Resource Types
??Proximity Values
Components
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Component Status Reference
VCALENDAR Current [RFC5545, Section 3.4]
VEVENT Current [RFC5545, Section 3.6.1]
VTODO Current [RFC5545, Section 3.6.2]
VJOURNAL Current [RFC5545, Section 3.6.3]
VFREEBUSY Current [RFC5545, Section 3.6.4]
VTIMEZONE Current [RFC5545, Section 3.6.5]
VALARM Current [RFC5545, Section 3.6.6]
STANDARD Current [RFC5545, Section 3.6.5]
DAYLIGHT Current [RFC5545, Section 3.6.5]
VAVAILABILITY Current [RFC7953, Section 3.1]
AVAILABLE Current [RFC7953, Section 3.1]
PARTICIPANT Current [RFC9073, Section 7.1]
VLOCATION Current [RFC9073, Section 7.2] [RFC Errata 7381]
VRESOURCE Current [RFC9073, Section 7.3]
Properties
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Property Status Reference
CALSCALE Current [RFC5545, Section 3.7.1]
METHOD Current [RFC5545, Section 3.7.2]
PRODID Current [RFC5545, Section 3.7.3]
VERSION Current [RFC5545, Section 3.7.4]
ATTACH Current [RFC5545, Section 3.8.1.1]
CATEGORIES Current [RFC5545, Section 3.8.1.2] [RFC7986, Section 5.6]
CLASS Current [RFC5545, Section 3.8.1.3]
COMMENT Current [RFC5545, Section 3.8.1.4]
DESCRIPTION Current [RFC5545, Section 3.8.1.5] [RFC7986, Section 5.2]
GEO Current [RFC5545, Section 3.8.1.6]
LOCATION Current [RFC5545, Section 3.8.1.7]
PERCENT-COMPLETE Current [RFC5545, Section 3.8.1.8]
PRIORITY Current [RFC5545, Section 3.8.1.9]
RESOURCES Current [RFC5545, Section 3.8.1.10]
STATUS Current [RFC5545, Section 3.8.1.11]
SUMMARY Current [RFC5545, Section 3.8.1.12]
COMPLETED Current [RFC5545, Section 3.8.2.1]
DTEND Current [RFC5545, Section 3.8.2.2]
DUE Current [RFC5545, Section 3.8.2.3]
DTSTART Current [RFC5545, Section 3.8.2.4]
DURATION Current [RFC5545, Section 3.8.2.5]
FREEBUSY Current [RFC5545, Section 3.8.2.6]
TRANSP Current [RFC5545, Section 3.8.2.7]
TZID Current [RFC5545, Section 3.8.3.1]
TZNAME Current [RFC5545, Section 3.8.3.2]
TZOFFSETFROM Current [RFC5545, Section 3.8.3.3]
TZOFFSETTO Current [RFC5545, Section 3.8.3.4]
TZURL Current [RFC5545, Section 3.8.3.5]
ATTENDEE Current [RFC5545, Section 3.8.4.1]
CONTACT Current [RFC5545, Section 3.8.4.2]
ORGANIZER Current [RFC5545, Section 3.8.4.3]
RECURRENCE-ID Current [RFC5545, Section 3.8.4.4]
RELATED-TO Current [RFC5545, Section 3.8.4.5] [RFC9253, Section 9.1]
URL Current [RFC5545, Section 3.8.4.6] [RFC7986, Section 5.5]
UID Current [RFC5545, Section 3.8.4.7] [RFC7986, Section 5.3]
EXDATE Current [RFC5545, Section 3.8.5.1]
EXRULE Deprecated [RFC2445, Section 4.8.5.2]
RDATE Current [RFC5545, Section 3.8.5.2]
RRULE Current [RFC5545, Section 3.8.5.3]
ACTION Current [RFC5545, Section 3.8.6.1]
REPEAT Current [RFC5545, Section 3.8.6.2]
TRIGGER Current [RFC5545, Section 3.8.6.3]
CREATED Current [RFC5545, Section 3.8.7.1]
DTSTAMP Current [RFC5545, Section 3.8.7.2]
LAST-MODIFIED Current [RFC5545, Section 3.8.7.3] [RFC7986, Section 5.4]
SEQUENCE Current [RFC5545, Section 3.8.7.4]
REQUEST-STATUS Current [RFC5545, Section 3.8.8.3]
XML Current [RFC6321, Section 4.2]
TZUNTIL Current [RFC7808, Section 7.1]
TZID-ALIAS-OF Current [RFC7808, Section 7.2]
BUSYTYPE Current [RFC7953, Section 3.2]
NAME Current [RFC7986, Section 5.1]
REFRESH-INTERVAL Current [RFC7986, Section 5.7]
SOURCE Current [RFC7986, Section 5.8]
COLOR Current [RFC7986, Section 5.9]
IMAGE Current [RFC7986, Section 5.10]
CONFERENCE Current [RFC7986, Section 5.11]
CALENDAR-ADDRESS Current [RFC9073, Section 6.4]
LOCATION-TYPE Current [RFC9073, Section 6.1]
PARTICIPANT-TYPE Current [RFC9073, Section 6.2]
RESOURCE-TYPE Current [RFC9073, Section 6.3]
STRUCTURED-DATA Current [RFC9073, Section 6.6]
STYLED-DESCRIPTION Current [RFC9073, Section 6.5]
ACKNOWLEDGED Current [RFC9074, Section 6.1]
PROXIMITY Current [RFC9074, Section 8.1]
CONCEPT Current [RFC9253, Section 8.1]
LINK Current [RFC9253, Section 8.2]
REFID Current [RFC9253, Section 8.3]
Parameters
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Parameter Status Reference
ALTREP Current [RFC5545, Section 3.2.1]
CN Current [RFC5545, Section 3.2.2]
CUTYPE Current [RFC5545, Section 3.2.3]
DELEGATED-FROM Current [RFC5545, Section 3.2.4]
DELEGATED-TO Current [RFC5545, Section 3.2.5]
DIR Current [RFC5545, Section 3.2.6]
ENCODING Current [RFC5545, Section 3.2.7]
FMTTYPE Current [RFC5545, Section 3.2.8]
FBTYPE Current [RFC5545, Section 3.2.9]
LANGUAGE Current [RFC5545, Section 3.2.10]
MEMBER Current [RFC5545, Section 3.2.11]
PARTSTAT Current [RFC5545, Section 3.2.12]
RANGE Current [RFC5545, Section 3.2.13]
RELATED Current [RFC5545, Section 3.2.14]
RELTYPE Current [RFC5545, Section 3.2.15]
ROLE Current [RFC5545, Section 3.2.16]
RSVP Current [RFC5545, Section 3.2.17]
SCHEDULE-AGENT Current [RFC6638, Section 7.1]
SCHEDULE-FORCE-SEND Current [RFC6638, Section 7.2]
SCHEDULE-STATUS Current [RFC6638, Section 7.3]
SENT-BY Current [RFC5545, Section 3.2.18]
TZID Current [RFC5545, Section 3.2.19]
VALUE Current [RFC5545, Section 3.2.20]
DISPLAY Current [RFC7986, Section 6.1]
EMAIL Current [RFC7986, Section 6.2]
FEATURE Current [RFC7986, Section 6.3]
LABEL Current [RFC7986, Section 6.4]
SIZE Current [RFC8607, Section 4.1]
FILENAME Current [RFC8607, Section 4.2]
MANAGED-ID Current [RFC8607, Section 4.3]
ORDER Current [RFC9073, Section 5.1]
SCHEMA Current [RFC9073, Section 5.2]
DERIVED Current [RFC9073, Section 5.3]
GAP Current [RFC9253, Section 6.2]
LINKREL Current [RFC9253, Section 6.1]
Value Data Types
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Note
A Standards Track RFC is REQUIRED for the registration of new Value Data Types that modify
existing properties.
Available Formats
[IMG]
CSV
Value Data Type Status Reference
BINARY Current [RFC5545, Section 3.3.1]
BOOLEAN Current [RFC5545, Section 3.3.2]
CAL-ADDRESS Current [RFC5545, Section 3.3.3]
DATE Current [RFC5545, Section 3.3.4]
DATE-TIME Current [RFC5545, Section 3.3.5]
DURATION Current [RFC5545, Section 3.3.6]
FLOAT Current [RFC5545, Section 3.3.7]
INTEGER Current [RFC5545, Section 3.3.8]
PERIOD Current [RFC5545, Section 3.3.9]
RECUR Current [RFC5545, Section 3.3.10]
TEXT Current [RFC5545, Section 3.3.11]
TIME Current [RFC5545, Section 3.3.12]
UNKNOWN Reserved - Do not use [RFC7265, Section 5]
URI Current [RFC5545, Section 3.3.13]
UTC-OFFSET Current [RFC5545, Section 3.3.14]
XML-REFERENCE Current [RFC9253, Section 7]
UID Current [RFC9253, Section 7]
Calendar User Types
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Calendar User Type Status Reference
INDIVIDUAL Current [RFC5545, Section 3.2.3]
GROUP Current [RFC5545, Section 3.2.3]
RESOURCE Current [RFC5545, Section 3.2.3]
ROOM Current [RFC5545, Section 3.2.3]
UNKNOWN Current [RFC5545, Section 3.2.3]
Free/Busy Time Types
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Free/Busy Time Type Status Reference
FREE Current [RFC5545, Section 3.2.9]
BUSY Current [RFC5545, Section 3.2.9]
BUSY-UNAVAILABLE Current [RFC5545, Section 3.2.9]
BUSY-TENTATIVE Current [RFC5545, Section 3.2.9]
Participation Statuses
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Note
A Standards Track RFC is REQUIRED for the registration of Participation Status values
to be used in "VEVENT" calendar components.
Available Formats
[IMG]
CSV
Participation Status Status Reference
NEEDS-ACTION Current [RFC5545, Section 3.2.12]
ACCEPTED Current [RFC5545, Section 3.2.12]
DECLINED Current [RFC5545, Section 3.2.12]
TENTATIVE Current [RFC5545, Section 3.2.12]
DELEGATED Current [RFC5545, Section 3.2.12]
COMPLETED Current [RFC5545, Section 3.2.12]
IN-PROCESS Current [RFC5545, Section 3.2.12]
Relationship Types
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Relationship Type Status Reference
CHILD Current [RFC5545, Section 3.2.15]
PARENT Current [RFC5545, Section 3.2.15]
SIBLING Current [RFC5545, Section 3.2.15]
SNOOZE Current [RFC9074, Section 7.1]
CONCEPT Current [RFC9253, Section 5]
DEPENDS-ON Current [RFC9253, Section 5]
FINISHTOFINISH Current [RFC9253, Section 4]
FINISHTOSTART Current [RFC9253, Section 4]
FIRST Current [RFC9253, Section 5]
NEXT Current [RFC9253, Section 5]
REFID Current [RFC9253, Section 5]
STARTTOFINISH Current [RFC9253, Section 4]
STARTTOSTART Current [RFC9253, Section 4]
Participation Roles
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Role Type Status Reference
CHAIR Current [RFC5545, Section 3.2.16]
REQ-PARTICIPANT Current [RFC5545, Section 3.2.16]
OPT-PARTICIPANT Current [RFC5545, Section 3.2.16]
NON-PARTICIPANT Current [RFC5545, Section 3.2.16]
Actions
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Action Status Reference
AUDIO Current [RFC5545, Section 3.8.6.1]
DISPLAY Current [RFC5545, Section 3.8.6.1]
EMAIL Current [RFC5545, Section 3.8.6.1]
PROCEDURE Deprecated [RFC2445, Section 4.8.6.1]
Classifications
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Classification Status Reference
PUBLIC Current [RFC5545, Section 3.8.1.3]
PRIVATE Current [RFC5545, Section 3.8.1.3]
CONFIDENTIAL Current [RFC5545, Section 3.8.1.3]
Methods
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5545]
Available Formats
[IMG]
CSV
Method Status Reference
PUBLISH Current [RFC5546]
REQUEST Current [RFC5546]
REPLY Current [RFC5546]
ADD Current [RFC5546]
CANCEL Current [RFC5546]
REFRESH Current [RFC5546]
COUNTER Current [RFC5546]
DECLINECOUNTER Current [RFC5546]
REQUEST-STATUS Values
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Bernard Desruisseaux, Ken Murchison, Mike Douglass
Reference
[RFC5546]
Available Formats
[IMG]
CSV
Status Code Status Reference
1.0 Current [RFC6638, Section 3.2.9.1]
1.1 Current [RFC6638, Section 3.2.9.2]
1.2 Current [RFC6638, Section 3.2.9.3]
2.0 Current [RFC5546, Section 3.6.1]
2.1 Current [RFC5546, Section 3.6.2]
2.2 Current [RFC5546, Section 3.6.3]
2.3 Current [RFC5546, Section 3.6.4]
2.4 Current [RFC5546, Section 3.6.5]
2.5 Current [RFC5546, Section 3.6.6]
2.6 Current [RFC5546, Section 3.6.7]
2.7 Current [RFC5546, Section 3.6.8]
2.8 Current [RFC5546, Section 3.6.9]
2.9 Current [RFC5546, Section 3.6.10]
2.10 Current [RFC5546, Section 3.6.11]
2.11 Current [RFC5546, Section 3.6.12]
3.0 Current [RFC5546, Section 3.6.13]
3.1 Current [RFC5546, Section 3.6.14]
3.2 Current [RFC5546, Section 3.6.15]
3.3 Current [RFC5546, Section 3.6.16]
3.4 Current [RFC5546, Section 3.6.17]
3.5 Current [RFC5546, Section 3.6.18]
3.6 Current [RFC5546, Section 3.6.19]
3.7 Current [RFC5546, Section 3.6.20]
3.8 Current [RFC5546, Section 3.6.21]
3.9 Current [RFC5546, Section 3.6.22]
3.10 Current [RFC5546, Section 3.6.23]
3.11 Current [RFC5546, Section 3.6.24]
3.12 Current [RFC5546, Section 3.6.25]
3.13 Current [RFC5546, Section 3.6.26]
3.14 Current [RFC5546, Section 3.6.27]
4.0 Current [RFC5546, Section 3.6.28]
5.0 Current [RFC5546, Section 3.6.29]
5.1 Current [RFC5546, Section 3.6.30]
5.2 Current [RFC5546, Section 3.6.31]
5.3 Current [RFC5546, Section 3.6.32]
Schedule Agent Values Registry
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Unassigned
Reference
[RFC6638]
Available Formats
[IMG]
CSV
Schedule Agent Status Reference
SERVER Current [RFC6638, Section 7.1]
CLIENT Current [RFC6638, Section 7.1]
NONE Current [RFC6638, Section 7.1]
Schedule Force Send Values Registry
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Unassigned
Reference
[RFC6638]
Available Formats
[IMG]
CSV
Schedule Force Send Status Reference
REQUEST Current [RFC6638, Section 7.2]
REPLY Current [RFC6638, Section 7.2]
Display Types
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Unassigned
Reference
[RFC7986]
Available Formats
[IMG]
CSV
Display Type Status Reference
BADGE Current [RFC7986, Section 6.1]
GRAPHIC Current [RFC7986, Section 6.1]
FULLSIZE Current [RFC7986, Section 6.1]
THUMBNAIL Current [RFC7986, Section 6.1]
Feature Types
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Unassigned
Reference
[RFC7986]
Available Formats
[IMG]
CSV
Name Status Reference
AUDIO Current [RFC7986, Section 6.3]
CHAT Current [RFC7986, Section 6.3]
FEED Current [RFC7986, Section 6.3]
MODERATOR Current [RFC7986, Section 6.3]
PHONE Current [RFC7986, Section 6.3]
SCREEN Current [RFC7986, Section 6.3]
VIDEO Current [RFC7986, Section 6.3]
Participant Types
Registration Procedure(s)
Expert Review
Expert(s)
Ken Murchison, Michael Douglass
Reference
[RFC9073]
Available Formats
[IMG]
CSV
Participant Type Status Reference
ACTIVE Current [RFC9073, Section 6.2]
INACTIVE Current [RFC9073, Section 6.2]
SPONSOR Current [RFC9073, Section 6.2]
CONTACT Current [RFC9073, Section 6.2]
BOOKING-CONTACT Current [RFC9073, Section 6.2]
EMERGENCY-CONTACT Current [RFC9073, Section 6.2]
PUBLICITY-CONTACT Current [RFC9073, Section 6.2]
PLANNER-CONTACT Current [RFC9073, Section 6.2]
PERFORMER Current [RFC9073, Section 6.2]
SPEAKER Current [RFC9073, Section 6.2]
Resource Types
Registration Procedure(s)
Expert Review
Expert(s)
Ken Murchison, Michael Douglass
Reference
[RFC9073]
Available Formats
[IMG]
CSV
Resource Type Status Reference
PROJECTOR Current [RFC9073, Section 6.3]
ROOM Current [RFC9073, Section 6.3]
REMOTE-CONFERENCE-AUDIO Current [RFC9073, Section 6.3]
REMOTE-CONFERENCE-VIDEO Current [RFC9073, Section 6.3]
Proximity Values
Registration Procedure(s)
Expert Review with RFC Required
Expert(s)
Ken Murchison, Michael Douglass
Reference
[RFC9074]
Available Formats
[IMG]
CSV
Value Status Reference
ARRIVE Current [RFC9074, Section 8.1]
DEPART Current [RFC9074, Section 8.1]
CONNECT Current [RFC9074, Section 8.1]
DISCONNECT Current [RFC9074, Section 8.1]
Licensing Terms
Presently we were in a very dark road, and at a point where it dropped suddenly between steep sides we halted in black shadow. A gleam of pale sand, a whisper of deep flowing waters, and a farther glimmer of more sands beyond them challenged our advance. We had come to a "grapevine ferry." The scow was on the other side, the water too shoal for the horses to swim, and the bottom, most likely, quicksand. Out of the blackness of the opposite shore came a soft, high-pitched, quavering, long-drawn, smothered moan of woe, the call of that snivelling little sinner the screech-owl. Ferry murmured to me to answer it and I sent the same faint horror-stricken tremolo back. Again it came to us, from not farther than one might toss his cap, and I followed Ferry down to the water's edge. The grapevine guy swayed at our side, we heard the scow slide from the sands, and in a few moments, moved by two videttes, it touched our shore. Soon we were across, the two videttes riding with us, and beyond a sharp rise, in an old opening made by the swoop of a hurricane, we entered the silent unlighted bivouac of Ferry's scouts. Ferry got down and sat on the earth talking with Quinn, while the sergeants quietly roused the sleepers to horse. Plotinus is driven by this perplexity to reconsider the whole theory of Matter.477 He takes Aristotle¡¯s doctrine as the groundwork of his investigation. According to this, all existence is divided into Matter and Form. What we know of things¡ªin other words, the sum of their differential characteristics¡ªis their Form. Take away this, and the unknowable residuum is their Matter. Again, Matter is the vague indeterminate something out of which particular Forms are developed. The two are related as Possibility to Actuality, as the more generic to the more specific substance through every grade of classification and composition. Thus there are two Matters, the one sensible and the other intelligible. The former constitutes the common substratum of bodies, the other the common element of ideas.478 The general distinction between Matter and Form was originally suggested to Aristotle by Plato¡¯s remarks on the same subject; but he differs325 from his master in two important particulars. Plato, in his Timaeus, seems to identify Matter with space.479 So far, it is a much more positive conception than the ?λη of the Metaphysics. On the other hand, he constantly opposes it to reality as something non-existent; and he at least implies that it is opposed to absolute good as a principle of absolute evil.480 Thus while the Aristotelian world is formed by the development of Power into Actuality, the Platonic world is composed by the union of Being and not-Being, of the Same and the Different, of the One and the Many, of the Limit and the Unlimited, of Good and Evil, in varying proportions with each other. The Lawton woman had heard of an officer's family at Grant, which was in need of a cook, and had gone there. [See larger version] On the 8th of July an extraordinary Privy Council was summoned. All the members, of whatever party, were desired to attend, and many were the speculations as to the object of their meeting. The general notion was that it involved the continuing or the ending of the war. It turned out to be for the announcement of the king's intended marriage. The lady selected was Charlotte, the second sister of the Duke of Mecklenburg-Strelitz. Apart from the narrowness of her education, the young princess had a considerable amount of amiability, good sense, and domestic taste. These she shared with her intended husband, and whilst they made the royal couple always retiring, at the same time they caused them to give, during their lives, a moral air to their court. On the 8th of September Charlotte arrived at St. James's, and that afternoon the marriage took place, the ceremony being performed by the Archbishop of Canterbury. On the 22nd the coronation took place with the greatest splendour. Mother and girls were inconsolable, for each had something that they were sure "Si would like," and would "do him good," but they knew Josiah Klegg, Sr., well enough to understand what was the condition when he had once made up his mind. CHAPTER V. THE YOUNG RECRUITS Si proceeded to deftly construct a litter out of the two guns, with some sticks that he cut with a knife, and bound with pawpaw strips. His voice had sunk very low, almost to sweetness. A soft flurry of pink went over her face, and her eyelids drooped. Then suddenly she braced herself, pulled herself taut, grew combative again, though her voice shook. HoME²Ô¾®Ïè̫ʲôÐÇ×ù
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