@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .

qudt:SolidAngleUnit a rdfs:Class,
        owl:Class,
        sh:NodeShape ;
    rdfs:label "Solid Angle Unit" ;
    dcterms:description """
  The solid angle subtended by a surface S is defined as the surface area of a unit sphere covered by the surface S's projection onto the sphere. 
  A solid angle is related to the surface of a sphere in the same way an ordinary angle is related to the circumference of a circle. 
  Since the total surface area of the unit sphere is 4*pi, the measure of solid angle will always be between 0 and 4*pi.
  """ ;
    rdfs:isDefinedBy <http://qudt.org/3.2.1/schema/qudt>,
        <http://qudt.org/3.2.1/schema/shacl/qudt> ;
    rdfs:subClassOf qudt:AngleUnit .