@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:t3-26.1>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "3-26.1" ;
  skosxl:prefLabel "attenuation"@en ;
  skosxl:altLabel "extinction"@en ;
  skosxl:altLabel "alpha"@en ;
  skos:definition "gradual decrease in magnitude (<<iso80000-2>>) of any kind of flux through a medium"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-3> ;
  isq:hasUnit [
    skos:notation "m^(-1)" ;
    skosxl:prefLabel "per metre"@en
  ] ;
  skos:note "If a quantity is a function of distance (<<t3-1.8>>) expressed by:\n\n[stem%unnumbered]\n++++\nf(x) prop e^(-alpha x)\n++++\n\nwhere stem:[x] denotes distance (<<t3-1.8>>), then stem:[alpha] denotes attenuation.\n\nThe inverse of attenuation is called attenuation length.\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-3:ed-2:en:item:3-26.1> .