@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:t7-28.1>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "7-28.1" ;
  skosxl:prefLabel "chromaticity coordinates in the CIE 1931 standard colorimetric system"@en ;
  skosxl:altLabel "x, y, z"@en ;
  skos:definition "coordinates expressing the quotients of each of a set of three tristimulus values for the CIE 1931 standard colorimetric observer (<<t7-26.1>>) and their sum, expressed by\n\n[stem%unnumbered]\n++++\nx = X // (X+Y+Z),\n++++\n\n[stem%unnumbered]\n++++\ny = Y // (X+Y+Z),\n++++\n\n[stem%unnumbered]\n++++\nz = Z // (X+Y+Z)\n++++\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-7> ;
  isq:hasUnit [
    skos:notation "1" ;
    skosxl:prefLabel "one"@en
  ] ;
  skos:note "Since stem:[x + y + z = 1], two variables are sufficient to express chromaticity."@en ;
  iso:urn <urn:iso:std:iso:80000:-7:ed-2:en:item:7-28.1> .