Measured quantity
Classisq
isq:MeasuredQuantityURI
https://w3id.org/standards/isq/ontologies/core/MeasuredQuantityQualified Name
isq:MeasuredQuantityDefinition
The quantity as measured — the measurement result Qm = {Q}·[Q]: a numerical value paired with a unit, obtained by measurement, optionally with its uncertainty (Pendrill 2019; JCGM 200:2012, VIM).
Scope Note
The only level of the hierarchy that carries a numerical value. ISO/IEC 80000 itself publishes no instances at this level; measured quantities arise in application and registry contexts.
Hierarchy
Inherited Properties (6)
Properties inherited from ancestor classes.
Properties by Class (4)
| Property | Description | Range | Type |
|---|---|---|---|
| isq:measurementOf | Relates the quantity as measured to the quantity instantiation that was measured. | isq:QuantityInstantiation | Object Property |
| isq:measuredAt | The point in time at which the measurement was performed. | xsd:dateTime | Datatype Property |
| isq:hasValue | The numerical value {Q} of the quantity as measured, Qm = {Q}·[Q]. | xsd:decimal | Datatype Property |
| isq:uncertainty | The expanded measurement uncertainty U associated with the measured quantity (JCGM 100:2008, GUM). | xsd:decimal | Datatype Property |
| Property | Description | Range | Type |
|---|---|---|---|
| isq:instantiationOf | Relates a quantity instantiation to the dedicated quantity it instantiates (L3 → L2). | isq:DedicatedQuantity | Object Property |
| isq:instantiates | Relates a quantity instantiation to the entity instance it is observed on (L3 quantity ↔ L3 entity). | smart:Entity | Object Property |
| isq:instantiatedAt | The point in time at which a quantity instantiation exists. | xsd:dateTime | Datatype Property |
| Property | Description | Range | Type |
|---|---|---|---|
| isq:hasUnit | Relates a quantity to a unit of measurement used to express its magnitude. | isq:Unit | Object Property |
| isq:hasDimension | Relates a quantity to its dimensional domain. | isq:Dimension | Object Property |
| isq:hasKind | Relates a quantity to the kind of quantity it belongs to (L1 → L0). | isq:KindOfQuantity | Object Property |
SHACL Constraints (1)
| Property | Min | Max | Type / Class | Node Kind |
|---|---|---|---|---|
| isq:measurementOf | 1 | 1 | isq:QuantityInstantiation | sh:IRI |
| isq:hasValue | 1 | 1 | xsd:decimal | — |
| isq:hasUnit | 1 | 1 | isq:Unit | sh:IRI |
| isq:uncertainty | — | 1 | xsd:decimal | — |
| isq:measuredAt | — | 1 | xsd:dateTime | — |
| skos:prefLabel | 1 | — | rdf:langStringuniqueLang | — |
Instances (1)
Where Used (6)
- isq:measurementOfvia domain
- isq:measuredAtvia domain
- isq:hasValuevia domain
- isq:uncertaintyvia domain
- isq:MeasuredQuantityShapevia targetClass
- ex:measuredLengthOfRodABvia type
@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
isq:MeasuredQuantity a,
owl:Class ;
rdfs:label "Measured quantity" ;
skos:definition "The quantity as measured — the measurement result Qm = {Q}·[Q]: a numerical value paired with a unit, obtained by measurement, optionally with its uncertainty (Pendrill 2019; JCGM 200:2012, VIM)." ;
rdfs:subClassOf isq:QuantityInstantiation ;
skos:scopeNote "The only level of the hierarchy that carries a numerical value. ISO/IEC 80000 itself publishes no instances at this level; measured quantities arise in application and registry contexts."
.