http://qudt.org/schema/qudt/PhysicalConstant
<p>A <em>Physical constant</em> is a physical quantity that is generally believed to be both universal in nature and constant in time.
It can be contrasted with a mathematical constant, which is a fixed numerical value but does not directly involve any physical measurement.
</p>
<p>There are many physical constants in science, some of the most widely recognized being:
the speed of light in vacuum c, Newton's gravitational constant G, Planck's constant h,
the electric permittivity of free space ε0, and the elementary charge e.
</p>
<p>Physical constants can take many dimensional forms, or may be dimensionless depending on the system of quantities and units used.
</p>
Focus nodes of this shape (qudt:PhysicalConstant) can have the following properties:
| PROPERTY | DESCRIPTION | MIN | MAX | VALUE TYPE | OTHER CONSTRAINTS |
|---|---|---|---|---|---|
| qudt:altSymbol | An alternative symbol | 0 | * | ||
| qudt:applicableSystem | This property relates a unit of measure with a unit system that may or may not define the unit, but within which the unit is compatible. | 0 | * | qudt:SystemOfUnits | |
| qudt:applicableUnit | <p>See this page on the QUDT GitHub<a href="https://github.com/qudt/qudt-public-repo/wiki/Advanced-User-Guide#4-computing-applicable-units-for-a-quantitykind">Wiki</a> on how "qudt:applicableUnit" is computed from "qudt:hasQuantityKind" and then materialized. </p> | 0 | * | qudt:Unit | |
| qudt:dbpediaMatch | 0 | * | xsd:anyURI | ||
| qudt:eclassCode | Provides an IRDI (International Registration Data Identifier) that identifies the corresponding definition in the ECLASS Standard. | 0 | * | xsd:string | |
| qudt:exactConstant | 0 | * | xsd:boolean | ||
| qudt:hasDimensionVector | 0 | * | qudt:QuantityKindDimensionVector | ||
| qudt:iec61360Code | Provides an IRDI (International Registration Data Identifier) that identifies the corresponding definition in the IEC CDD (Common Data Dictionary). | 0 | * | xsd:string | |
| qudt:isoNormativeReference | Provides a way to reference the ISO unit definition. | 0 | * | xsd:anyURI | |
| qudt:latexDefinition | 0 | 1 | qudt:LatexString | ||
| qudt:latexSymbol | The symbol is a glyph that is used to represent some concept, typically a unit or a quantity, in a compact form. For example, the symbol for an Ohm is $ohm$. This contrasts with 'unit:abbreviation', which gives a short alphanumeric abbreviation for the unit, 'ohm' for Ohm. | 0 | * | qudt:LatexString | |
| qudt:mathMLdefinition | 0 | 1 | xsd:string | ||
| qudt:normativeReference | Provides a way to reference information that is an authoritative source providing a standard definition | 0 | * | xsd:anyURI | |
| qudt:siExactMatch | 0 | 1 | |||
| qudt:symbol | The symbol is a glyph that is used to represent some concept, typically a unit or a quantity, in a compact form. For example, the symbol for an Ohm is $ohm$. This contrasts with 'unit:abbreviation', which gives a short alphanumeric abbreviation for the unit, 'ohm' for Ohm. | 0 | 1 | ||
| qudt:ucumCode | <p><em>ucumCode</em> associates a QUDT unit with its UCUM code (case-sensitive). </p><p>In SHACL the values are derived from specific ucum properties using 'sh:values'.</p> | 0 | * | qudt:UCUMcs |
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
qudt:PhysicalConstant a rdfs:Class,
sh:NodeShape ;
rdfs:label "Physical Constant" ;
dcterms:description """
<p>A <em>Physical constant</em> is a physical quantity that is generally believed to be both universal in nature and constant in time.
It can be contrasted with a mathematical constant, which is a fixed numerical value but does not directly involve any physical measurement.
</p>
<p>There are many physical constants in science, some of the most widely recognized being:
the speed of light in vacuum c, Newton's gravitational constant G, Planck's constant h,
the electric permittivity of free space ε0, and the elementary charge e.
</p>
<p>Physical constants can take many dimensional forms, or may be dimensionless depending on the system of quantities and units used.
</p>"""^^rdf:HTML ;
qudt:dbpediaMatch "http://dbpedia.org/resource/Physical_constant"^^xsd:anyURI ;
rdfs:isDefinedBy <http://qudt.org/3.5.2/schema/shacl/qudt> ;
rdfs:subClassOf qudt:Quantity ;
sh:property qudt:PhysicalConstant-altSymbol,
qudt:PhysicalConstant-applicableSystem,
qudt:PhysicalConstant-applicableUnit,
qudt:PhysicalConstant-dbpediaMatch,
qudt:PhysicalConstant-eclassCode,
qudt:PhysicalConstant-exactConstant,
qudt:PhysicalConstant-hasDimensionVector,
qudt:PhysicalConstant-iec61360Code,
qudt:PhysicalConstant-isoNormativeReference,
qudt:PhysicalConstant-latexDefinition,
qudt:PhysicalConstant-latexSymbol,
qudt:PhysicalConstant-mathMLdefinition,
qudt:PhysicalConstant-normativeReference,
qudt:PhysicalConstant-siExactMatch,
qudt:PhysicalConstant-symbol,
qudt:PhysicalConstant-ucumCode .