@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@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:Quantity a rdfs:Class,
        owl:Class,
        sh:NodeShape ;
    rdfs:label "Quantity" ;
    dcterms:description """
  <p>A <b>Quantity</b> is the measurement of an observable property of a particular object, event, or physical system. 
  A quantity is always associated with the context of measurement (i.e. the thing measured, the measured value, the accuracy of measurement, etc.) whereas the 
  underlying <b>quantity kind</b> is independent of any particular measurement. Thus, length is a quantity kind while the height of a rocket is a specific 
  quantity of length; its magnitude that may be expressed in meters, feet, inches, etc. Examples of physical quantities include physical constants, such as 
  the speed of light in a vacuum, Planck's constant, the electric permittivity of free space, and the fine structure constant. </p>
<p>In other words, quantities are quantifiable aspects of the world, such as the duration of a movie, the distance between two points, 
velocity of a car, the pressure of the atmosphere, and a person's weight; and units are used to describe their numerical measure.</p> 
<p>Many <b>quantity kinds</b> are related to each other by various physical laws, and as a result, the associated units of some quantity 
kinds can be expressed as products (or ratios) of powers of other quantity kinds (e.g., momentum is mass times velocity and velocity is defined as distance 
divided by time). In this way, some quantities can be calculated from other measured quantities using their associations to the quantity kinds in these 
expressions. These quantity kind relationships are also discussed in dimensional analysis. Those that cannot be so expressed can be regarded 
as "fundamental" in this sense.</p>
<p>A quantity is distinguished from a "quantity kind" in that the former carries a value and the latter is a type specifier.
</p>"""^^rdf:HTML ;
    qudt:dbpediaMatch "http://dbpedia.org/resource/Quantity"^^xsd:anyURI ;
    rdfs:isDefinedBy <http://qudt.org/3.2.1/schema/qudt>,
        <http://qudt.org/3.2.1/schema/shacl/qudt> ;
    rdfs:subClassOf [ a owl:Restriction ;
            owl:allValuesFrom qudt:QuantityValue ;
            owl:onProperty qudt:quantityValue ],
        [ a owl:Restriction ;
            owl:minCardinality "0"^^xsd:nonNegativeInteger ;
            owl:onProperty qudt:hasQuantityKind ],
        [ a owl:Restriction ;
            owl:allValuesFrom qudt:QuantityKind ;
            owl:onProperty qudt:hasQuantityKind ],
        [ a owl:Restriction ;
            owl:allValuesFrom xsd:boolean ;
            owl:onProperty qudt:isDeltaQuantity ],
        qudt:Concept,
        qudt:Quantifiable,
        qudt:Verifiable ;
    sh:property qudt:Quantity-hasQuantityKind,
        qudt:Quantity-isDeltaQuantity,
        qudt:Quantity-quantityValue .