ISO 8601
E18759
ISO 8601 is an international standard that defines a consistent, unambiguous format for representing dates, times, and related data in numeric form.
All labels observed (6)
| Label | Occurrences |
|---|---|
| ISO 8601 canonical | 8 |
| ISO 8601 (by defining a profile) | 1 |
| ISO 8601 date representations | 1 |
| ISO 8601 date system | 1 |
| ISO 8601 time format | 1 |
| ISO week date system | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T156052 — 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: ISO 8601 Context triple: [International Organization for Standardization, issuesStandard, ISO 8601]
-
A.
Coordinated Universal Time
Coordinated Universal Time (UTC) is the primary global time standard by which the world regulates clocks and time, serving as the basis for most civil time zones.
-
B.
ISO 15022
ISO 15022 is an international standard that defines a structured, machine-readable format for securities messaging used globally in financial markets.
-
C.
IANA time zone database
The IANA time zone database is a globally maintained, authoritative repository of time zone information used by most modern computer systems and software to handle local times and daylight saving rules.
-
D.
Hebrew calendar
The Hebrew calendar is a lunisolar calendar used primarily for Jewish religious observances, holidays, and the determination of ceremonial dates.
-
E.
Gregorian calendar (Western churches)
The Gregorian calendar (Western churches) is the internationally used solar dating system introduced in 1582 that most Western Christian churches follow for determining liturgical dates and feasts.
- 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: ISO 8601 Target entity description: ISO 8601 is an international standard that defines a consistent, unambiguous format for representing dates, times, and related data in numeric form.
-
A.
Coordinated Universal Time
Coordinated Universal Time (UTC) is the primary global time standard by which the world regulates clocks and time, serving as the basis for most civil time zones.
-
B.
ISO 15022
ISO 15022 is an international standard that defines a structured, machine-readable format for securities messaging used globally in financial markets.
-
C.
IANA time zone database
The IANA time zone database is a globally maintained, authoritative repository of time zone information used by most modern computer systems and software to handle local times and daylight saving rules.
-
D.
Hebrew calendar
The Hebrew calendar is a lunisolar calendar used primarily for Jewish religious observances, holidays, and the determination of ceremonial dates.
-
E.
Gregorian calendar (Western churches)
The Gregorian calendar (Western churches) is the internationally used solar dating system introduced in 1582 that most Western Christian churches follow for determining liturgical dates and feasts.
- F. None of above. chosen
Statements (61)
| Predicate | Object |
|---|---|
| instanceOf |
date and time representation standard
ⓘ
international standard ⓘ |
| aimsTo |
avoid ambiguity in date and time representations
ⓘ
facilitate international communication of date and time data ⓘ |
| appliesTo |
computer systems
ⓘ
data interchange ⓘ documentation ⓘ electronic communication ⓘ |
| defines |
24-hour time notation
ⓘ
UTC time representation ⓘ basic format ⓘ calendar date representation ⓘ combined date and time representation ⓘ date format ⓘ date-time format ⓘ duration format ⓘ extended format ⓘ local time representation ⓘ offset from UTC representation ⓘ ordinal date format ⓘ recurring time interval format ⓘ time format ⓘ time interval format ⓘ time zone designator format ⓘ week date format ⓘ |
| influenced | RFC 3339 ⓘ |
| languageIndependent | true ⓘ |
| maintainedBy | International Organization for Standardization ⓘ |
| orderingPrinciple | largest time unit to smallest time unit ⓘ |
| recommends |
left-zero padding of numeric components
ⓘ
year-month-day order for dates ⓘ |
| scriptIndependent | true ⓘ |
| shortName | ISO 8601 self-link ⓘ |
| specifies |
HH:MM:SS time format
ⓘ
YYYY-MM-DD date format ⓘ YYYY-MM-DDThh:mm:ss date-time format ⓘ duration format starting with P ⓘ four-digit year representation ⓘ fractional seconds representation ⓘ leading zero usage in dates and times ⓘ ordinal date format YYYY-DDD ⓘ time interval representation using solidus / ⓘ time zone offset format ±hh:mm ⓘ two-digit day representation ⓘ two-digit hour representation ⓘ two-digit minute representation ⓘ two-digit month representation ⓘ two-digit second representation ⓘ use of the letter T as date-time separator ⓘ use of the letter Z for UTC ⓘ week date format YYYY-Www-D ⓘ week numbering system ⓘ week starting on Monday ⓘ |
| title | Data elements and interchange formats — Information interchange — Representation of dates and times ⓘ |
| usedBy |
databases
ⓘ
file formats ⓘ many internet protocols ⓘ web APIs ⓘ |
| usesCalendar |
Gregorian calendar (Western churches)
ⓘ
surface form:
Gregorian calendar
|
| usesNotation |
24-hour clock
ⓘ
numeric date representation ⓘ |
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: ISO 8601 Description of subject: ISO 8601 is an international standard that defines a consistent, unambiguous format for representing dates, times, and related data in numeric form.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
ISO 8601 time format
this entity surface form:
ISO 8601 date representations
this entity surface form:
ISO week date system