@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t3-8>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "3-8" ;
  skosxl:prefLabel "solid angular measure"@en ;
  skosxl:altLabel "ii(Omega)"@en ;
  skos:definition "measure of a conical geometric figure, called solid angle, formed by all rays, originating from a common point, called the vertex of the solid angle, and passing through the points of a closed, non-self-intersecting curve in space considered as the border of a surface"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-3> ;
  isq:hasUnit [
    skos:notation "sr" ;
    skosxl:prefLabel "steradian"@en
  ] ;
  isq:hasUnit [
    skos:notation "1" ;
    skosxl:prefLabel "one"@en
  ] ;
  skos:note "The differential solid angular measure expressed in spherical coordinates (<<iso80000-2>>) is given by:\n\n[stem%unnumbered]\n++++\n\"d\"ii(Omega) = A/(r^2)\"sin\"theta \" d\"theta \" d\"varphi\n++++\n\nwhere stem:[A] is area, stem:[r] is radius, stem:[theta] and stem:[varphi] are spherical coordinates.\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-3:ed-2:en:item:3-8> .