UCUM
E208118
UCUM (Unified Code for Units of Measure) is a standardized coding system designed to provide unambiguous, machine-readable representations of measurement units used in science, engineering, and healthcare.
All labels observed (2)
| Label | Occurrences |
|---|---|
| UCUM canonical | 2 |
| Unified Code for Units of Measure | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1870498 — 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: UCUM Context triple: [LOINC, mappedTo, UCUM]
-
A.
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.
-
B.
Heaviside–Lorentz units
Heaviside–Lorentz units are a rationalized system of electromagnetic units commonly used in theoretical physics, especially in relativistic formulations of Maxwell’s equations and quantum field theory.
-
C.
Gaussian units
Gaussian units are a cgs-based system of electromagnetic units widely used in theoretical physics, especially in electrodynamics, for their mathematical simplicity and symmetry.
-
D.
Fermi (unit)
The fermi is a unit of length equal to one femtometer (10⁻¹⁵ meter), commonly used in nuclear and particle physics to express sizes of atomic nuclei and subatomic particles.
-
E.
UNIT
UNIT is a fictional military intelligence organization in the Doctor Who universe that defends Earth from alien and supernatural threats.
- 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: UCUM Target entity description: UCUM (Unified Code for Units of Measure) is a standardized coding system designed to provide unambiguous, machine-readable representations of measurement units used in science, engineering, and healthcare.
-
A.
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.
-
B.
Heaviside–Lorentz units
Heaviside–Lorentz units are a rationalized system of electromagnetic units commonly used in theoretical physics, especially in relativistic formulations of Maxwell’s equations and quantum field theory.
-
C.
Gaussian units
Gaussian units are a cgs-based system of electromagnetic units widely used in theoretical physics, especially in electrodynamics, for their mathematical simplicity and symmetry.
-
D.
Fermi (unit)
The fermi is a unit of length equal to one femtometer (10⁻¹⁵ meter), commonly used in nuclear and particle physics to express sizes of atomic nuclei and subatomic particles.
-
E.
UNIT
UNIT is a fictional military intelligence organization in the Doctor Who universe that defends Earth from alien and supernatural threats.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
ontology of units of measure
ⓘ
standard ⓘ unit coding system ⓘ |
| abbreviation | UCUM self-link ⓘ |
| appliesTo |
laboratory test results
ⓘ
observations in healthcare ⓘ quantitative measurements ⓘ |
| designedBy | Regenstrief Institute ⓘ |
| domain |
clinical data exchange
ⓘ
engineering ⓘ healthcare ⓘ laboratory medicine ⓘ science ⓘ |
| feature |
machine-processable codes
ⓘ
support for SI units ⓘ support for binary prefixes ⓘ support for composite units with multiplication and division ⓘ support for concentration units ⓘ support for customary units ⓘ support for dimensionless quantities ⓘ support for exponents in unit expressions ⓘ support for metric prefixes ⓘ support for non-SI units ⓘ support for time units ⓘ unambiguous unit syntax ⓘ |
| fullName |
UCUM
self-linksurface differs
ⓘ
surface form:
Unified Code for Units of Measure
|
| goal |
avoid ambiguity in unit abbreviations
ⓘ
ensure consistent interpretation of measurement units across systems ⓘ facilitate automated unit conversion ⓘ |
| hasComponent |
base units
ⓘ
composite unit expressions ⓘ derived units ⓘ prefixes ⓘ |
| hasRepresentationForm |
formal grammar for unit expressions
ⓘ
string codes ⓘ |
| maintainedBy | Regenstrief Institute ⓘ |
| purpose |
enable machine-readable unit codes
ⓘ
provide unambiguous representations of units of measure ⓘ support interoperability of measurement data ⓘ |
| relatedTo |
FHIR
ⓘ
surface form:
HL7 FHIR
HL7 standards ⓘ
surface form:
HL7 V2
ISO 80000-3 ⓘ
surface form:
ISO 80000
International System of Units ⓘ LOINC ⓘ
surface form:
LOINC terminology
|
| supportsOperation |
unit comparison
ⓘ
unit conversion ⓘ validation of unit strings ⓘ |
| useWith |
FHIR
ⓘ
HL7 standards ⓘ LOINC ⓘ clinical laboratory systems ⓘ electronic health records ⓘ |
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: UCUM Description of subject: UCUM (Unified Code for Units of Measure) is a standardized coding system designed to provide unambiguous, machine-readable representations of measurement units used in science, engineering, and healthcare.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.