@prefix theia_ozcar_thesaurus: <https://w3id.org/ozcar-theia/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix ns0: <https://w3id.org/iadopt/ont/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

theia_ozcar_thesaurus:c_cbac8f6c
  skos:narrower theia_ozcar_thesaurus:c_bd9021ed ;
  a skos:Concept, <https://w3id.org/iadopt/ont/Variable> ;
  skos:prefLabel "Solar radiation irradiance"@en .

theia_ozcar_thesaurus:c_bd9021ed
  a skos:Concept, <https://w3id.org/iadopt/ont/Variable> ;
  dc:contributor <https://orcid.org/0000-0002-0544-4802> ;
  dc:creator <https://orcid.org/0000-0002-0544-4802> ;
  skos:definition theia_ozcar_thesaurus:def_9db1e404 ;
  skos:inScheme theia_ozcar_thesaurus: ;
  skos:prefLabel "Direct normal irradiance"@en ;
  skos:altLabel "DNI"@en, "Beam radiation"@en, "Direct insolation"@en ;
  skos:broader theia_ozcar_thesaurus:c_cbac8f6c ;
  dc:created "2026-01-05T10:11:10"^^xsd:dateTime ;
  dc:modified "2026-01-05T11:49:10"^^xsd:dateTime ;
  ns0:hasConstraint theia_ozcar_thesaurus:c_dbb30492, theia_ozcar_thesaurus:c_5c63c4c5 ;
  ns0:hasObjectOfInterest theia_ozcar_thesaurus:c_b9ce5638 ;
  ns0:hasProperty theia_ozcar_thesaurus:c_e6e18487 ;
  theia_ozcar_thesaurus:simplifiedLabel "Direct horizontal irradiance"@en .

rdf:type
  rdfs:label "type" ;
  rdfs:comment "The subject is an instance of a class." .

skos:Concept
  a owl:Class ;
  rdfs:label "Concept"@en, "SKOS Concept"@en .

ns0:Variable
  a owl:Class ;
  rdfs:label "Variable" .

skos:definition
  rdfs:label "definition"@en ;
  skos:definition "A statement or formal explanation of the meaning of a concept."@en ;
  rdfs:subPropertyOf skos:note .

theia_ozcar_thesaurus:def_9db1e404
  rdf:value "Direct insolation, also known as direct normal irradiance, or its acronym, DNI, is the insolation measured at a given location on Earth with a surface element perpendicular to the Sun's rays, excluding diffuse insolation (the solar radiation that is scattered or reflected by atmospheric components in the sky). Direct insolation is equal to the solar irradiance above the atmosphere minus the atmospheric losses due to absorption and scattering. While the solar irradiance above the atmosphere varies with the Earth–Sun distance and solar cycles, the losses depend on the time of day (length of light's path through the atmosphere depending on the solar elevation angle), cloud cover, humidity, and other impurities."@en ;
  dc:source <https://en.wikipedia.org/wiki/Direct_insolation> .

skos:inScheme
  rdfs:label "is in scheme"@en ;
  skos:definition "Relates a resource (for example a concept) to a concept scheme in which it is included."@en .

theia_ozcar_thesaurus: a owl:Ontology, skos:ConceptScheme .
skos:prefLabel
  rdfs:label "preferred label"@en ;
  rdfs:comment "A resource has no more than one value of skos:prefLabel per language tag, and no more than one value of skos:prefLabel without language tag."@en, "The range of skos:prefLabel is the class of RDF plain literals."@en, """skos:prefLabel, skos:altLabel and skos:hiddenLabel are pairwise
      disjoint properties."""@en ;
  skos:definition "The preferred lexical label for a resource, in a given language."@en ;
  rdfs:subPropertyOf rdfs:label .

skos:altLabel
  rdfs:label "alternative label"@en ;
  rdfs:comment "The range of skos:altLabel is the class of RDF plain literals."@en, "skos:prefLabel, skos:altLabel and skos:hiddenLabel are pairwise disjoint properties."@en ;
  skos:definition "An alternative lexical label for a resource."@en ;
  rdfs:subPropertyOf rdfs:label .

skos:broader
  rdfs:label "has broader"@en ;
  rdfs:comment "Broader concepts are typically rendered as parents in a concept hierarchy (tree)."@en ;
  skos:definition "Relates a concept to a concept that is more general in meaning."@en ;
  rdfs:subPropertyOf skos:broaderTransitive .

ns0:hasConstraint
  rdfs:label "has Constraint" ;
  rdfs:comment "A Variable has a Constraint, that confines an Entity involved in the observation." .

theia_ozcar_thesaurus:c_dbb30492
  a skos:Concept, ns0:Constraint ;
  skos:prefLabel "Direct radiation"@en .

theia_ozcar_thesaurus:c_5c63c4c5
  a skos:Concept, ns0:Constraint ;
  skos:prefLabel "Irradiance recieved by a surface normal to the incident beam"@en .

ns0:hasObjectOfInterest
  rdfs:label "has ObjectOfInterest" ;
  rdfs:comment "A Variable has an Entity whose Property is observed." .

theia_ozcar_thesaurus:c_b9ce5638
  a skos:Concept, ns0:Entity ;
  skos:prefLabel "Solar radiation"@en .

ns0:hasProperty
  rdfs:label "has Property" ;
  rdfs:comment "A Variable has a Property that characterizes an Entity." .

theia_ozcar_thesaurus:c_e6e18487
  a skos:Concept, ns0:Property ;
  skos:prefLabel "Irradiance"@en .

theia_ozcar_thesaurus:simplifiedLabel
  rdfs:label "Simplified label"@en ;
  rdfs:comment "For Theia OZCAR information system purpose. This label is used to enhance discoverability on the information system."@en .