26th General Conference on Weights and Measures
E57428
General Conference on Weights and Measures
diplomatic conference
international scientific conference
The 26th General Conference on Weights and Measures was the 2018 international meeting where member states adopted a landmark revision of the SI, redefining several base units in terms of fundamental physical constants.
All labels observed (3)
| Label | Occurrences |
|---|---|
| 26th General Conference on Weights and Measures canonical | 3 |
| 26th CGPM (2018) | 1 |
| General Conference on Weights and Measures | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T461989 — 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: 26th General Conference on Weights and Measures Context triple: [Boltzmann constant, fixedBy, 26th General Conference on Weights and Measures]
-
A.
International Bureau of Weights and Measures
The International Bureau of Weights and Measures is an international organization that maintains the global system of units (SI) and ensures worldwide uniformity of measurements and time standards.
-
B.
International System of Units
The International System of Units is the globally accepted standard for measurement, defining a coherent set of base and derived units used in science, industry, and everyday life.
-
C.
International Meridian Conference
The International Meridian Conference was an 1884 gathering of nations in Washington, D.C., that established the Greenwich meridian as the international prime meridian and laid the foundation for global time standardization.
-
D.
International Bureau
The International Bureau is the permanent secretariat and administrative center of the Universal Postal Union, responsible for coordinating international postal activities and supporting member countries.
-
E.
World Meteorological Convention
The World Meteorological Convention is the international treaty that created the World Meteorological Organization, establishing the framework for global cooperation in meteorology, climatology, and related geophysical sciences.
- 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: 26th General Conference on Weights and Measures Target entity description: The 26th General Conference on Weights and Measures was the 2018 international meeting where member states adopted a landmark revision of the SI, redefining several base units in terms of fundamental physical constants.
-
A.
International Bureau of Weights and Measures
The International Bureau of Weights and Measures is an international organization that maintains the global system of units (SI) and ensures worldwide uniformity of measurements and time standards.
-
B.
International System of Units
The International System of Units is the globally accepted standard for measurement, defining a coherent set of base and derived units used in science, industry, and everyday life.
-
C.
International Meridian Conference
The International Meridian Conference was an 1884 gathering of nations in Washington, D.C., that established the Greenwich meridian as the international prime meridian and laid the foundation for global time standardization.
-
D.
International Bureau
The International Bureau is the permanent secretariat and administrative center of the Universal Postal Union, responsible for coordinating international postal activities and supporting member countries.
-
E.
World Meteorological Convention
The World Meteorological Convention is the international treaty that created the World Meteorological Organization, establishing the framework for global cooperation in meteorology, climatology, and related geophysical sciences.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
General Conference on Weights and Measures
ⓘ
diplomatic conference ⓘ international scientific conference ⓘ |
| adopted |
CGPM resolutions
ⓘ
surface form:
Resolution 1 (On the revision of the International System of Units, the SI)
fixed numerical value of the Avogadro constant NA ⓘ fixed numerical value of the Boltzmann constant k ⓘ fixed numerical value of the Planck constant h ⓘ fixed numerical value of the elementary charge e ⓘ landmark revision of the SI ⓘ multiple resolutions concerning the SI ⓘ redefinition of the ampere ⓘ redefinition of the kelvin ⓘ redefinition of the kilogram ⓘ redefinition of the mole ⓘ revised definitions of all seven SI base units ⓘ |
| basedOn |
fundamental physical constants
ⓘ
quantum electrical standards ⓘ thermodynamic temperature scale ⓘ |
| confirmedDefinitionOfUnit |
candela
ⓘ
metre ⓘ second ⓘ |
| convenedBy | International Bureau of Weights and Measures ⓘ |
| country | France ⓘ |
| effectiveDateOfNewDefinitions |
2019-05-20
ⓘ
World Metrology Day 2019 ⓘ |
| endDate | 2018-11-16 ⓘ |
| followedBy | 27th General Conference on Weights and Measures ⓘ |
| goal |
ensure long-term stability of SI units
ⓘ
improve universality and accessibility of SI realizations ⓘ |
| hasNumberOfMemberStatesRepresented | member states of the Metre Convention ⓘ |
| location |
France
ⓘ
Château de Versailles ⓘ
surface form:
Palace of Versailles
Versailles ⓘ Île-de-France region ⓘ
surface form:
Île-de-France
|
| mainTheme | redefinition of SI base units using fundamental physical constants ⓘ |
| ordinalNumber | 26 ⓘ |
| organizedBy |
General Conference on Weights and Measures
ⓘ
surface form:
General Conference on Weights and Measures (CGPM)
|
| partOf | series of General Conferences on Weights and Measures ⓘ |
| precededBy | 25th General Conference on Weights and Measures ⓘ |
| redefinedUnit |
ampere
ⓘ
kelvin ⓘ kilogram ⓘ mole ⓘ |
| significance |
ended dependence of the kilogram on a material artefact
ⓘ
marked the most extensive revision of the SI since its creation ⓘ |
| startDate | 2018-11-13 ⓘ |
| subjectOf | revision of the International System of Units ⓘ |
| timePeriod |
2010s
ⓘ
21st century ⓘ November 2018 ⓘ |
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: 26th General Conference on Weights and Measures Description of subject: The 26th General Conference on Weights and Measures was the 2018 international meeting where member states adopted a landmark revision of the SI, redefining several base units in terms of fundamental physical constants.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
General Conference on Weights and Measures
this entity surface form:
26th CGPM (2018)
25th General Conference on Weights and Measures
→
followedBy
→
26th General Conference on Weights and Measures
ⓘ
27th General Conference on Weights and Measures
→
follows
→
26th General Conference on Weights and Measures
ⓘ