iCalendar
E72110
iCalendar is a widely used open standard file format for exchanging calendar and scheduling information across different applications and services.
All labels observed (6)
| Label | Occurrences |
|---|---|
| iCalendar canonical | 19 |
| RFC 5545 | 2 |
| iCal | 2 |
| Internet Calendaring and Scheduling Core Object Specification | 1 |
| iCalendar RFC 2445 | 1 |
| iCalendar components | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T576289 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: iCalendar Context triple: [Google Calendar, supportsProtocol, iCalendar]
-
A.
Google Calendar
Google Calendar is a time-management and scheduling service by Google that lets users create, share, and manage events and reminders across devices.
-
B.
Lotus Notes
Lotus Notes is a collaborative client-server software platform best known for its email, calendaring, and business application capabilities, widely used in enterprises for groupware and workflow solutions.
-
C.
Sun Java System Calendar Server
Sun Java System Calendar Server is an enterprise-grade calendaring and scheduling server software designed to provide shared calendars, resource booking, and group scheduling capabilities within large organizations.
-
D.
Google Contacts
Google Contacts is a contact management service by Google that stores and syncs users’ personal and professional contact information across Google’s apps and devices.
-
E.
OneNote
OneNote is Microsoft's digital note-taking application that lets users capture, organize, and sync notes, drawings, and multimedia content across devices.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: iCalendar Target entity description: iCalendar is a widely used open standard file format for exchanging calendar and scheduling information across different applications and services.
-
A.
Google Calendar
Google Calendar is a time-management and scheduling service by Google that lets users create, share, and manage events and reminders across devices.
-
B.
Lotus Notes
Lotus Notes is a collaborative client-server software platform best known for its email, calendaring, and business application capabilities, widely used in enterprises for groupware and workflow solutions.
-
C.
Sun Java System Calendar Server
Sun Java System Calendar Server is an enterprise-grade calendaring and scheduling server software designed to provide shared calendars, resource booking, and group scheduling capabilities within large organizations.
-
D.
Google Contacts
Google Contacts is a contact management service by Google that stores and syncs users’ personal and professional contact information across Google’s apps and devices.
-
E.
OneNote
OneNote is Microsoft's digital note-taking application that lets users capture, organize, and sync notes, drawings, and multimedia content across devices.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
file format
ⓘ
internet standard ⓘ open standard ⓘ |
| abbreviation |
iCalendar
self-linksurface differs
ⓘ
surface form:
iCal
|
| characterEncoding | UTF-8 ⓘ |
| conformsTo | RFC 5545 specification ⓘ |
| definedInRFC |
iCalendar
self-linksurface differs
ⓘ
surface form:
RFC 5545
|
| domain |
calendaring
ⓘ
scheduling ⓘ |
| fileExtension |
.ical
ⓘ
.icalendar ⓘ .ics ⓘ .ifb ⓘ |
| firstStandardizedYear | 1998 ⓘ |
| fullName |
iCalendar
self-linksurface differs
ⓘ
surface form:
Internet Calendaring and Scheduling Core Object Specification
|
| hasVersion | 2.0 ⓘ |
| mediaType | text/calendar ⓘ |
| obsoletes | vCalendar ⓘ |
| relatedStandard |
CalDAV
ⓘ
iMIP ⓘ iTIP ⓘ |
| serializationFormat | plain text ⓘ |
| standardizedBy |
Internet Engineering Task Force
ⓘ
surface form:
IETF
|
| supportsComponent |
VALARM
ⓘ
VEVENT ⓘ VFREEBUSY ⓘ VJOURNAL ⓘ VTIMEZONE ⓘ VTODO ⓘ |
| supportsFeature |
event alarms
ⓘ
free-busy information ⓘ recurring events ⓘ task management ⓘ time zone specification ⓘ |
| supportsMethod |
ADD
ⓘ
CANCEL ⓘ COUNTER ⓘ DECLINECOUNTER ⓘ PUBLISH ⓘ REFRESH ⓘ REPLY ⓘ REQUEST ⓘ |
| typicalUsage |
exchange calendar data between applications
ⓘ
publish calendars on the web ⓘ subscribe to remote calendars ⓘ |
| usedBy |
Apple Calendar
ⓘ
Google Calendar ⓘ Outlook ⓘ
surface form:
Microsoft Outlook
Thunderbird email client ⓘ
surface form:
Mozilla Thunderbird
|
| usesLineFolding | true ⓘ |
| usesPropertySyntax | key-value pairs with parameters ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: iCalendar Description of subject: iCalendar is a widely used open standard file format for exchanging calendar and scheduling information across different applications and services.
Referenced by (26)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
iCalendar RFC 2445
this entity surface form:
Internet Calendaring and Scheduling Core Object Specification
this entity surface form:
iCal
this entity surface form:
RFC 5545
this entity surface form:
iCal
this entity surface form:
RFC 5545