@prefix iop: <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 skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ex: <http://example.org/iadopt/challenge/> .

<http://example.org/PPFD_BC>
    a 
        iop:Variable ;
    rdfs:label 
        "Incoming Photosynthetic Photon Flux Density below canopy" ;
    rdfs:comment 
        """The flux density of the fraction of incoming photosynthetically active radiation that remains after being absorbed by vegetation canopy. """ ;
    iop:hasObjectOfInterest 
        <https://www.wikidata.org/entity/Q900892> ;
    iop:hasProperty 
        <https://qudt.org/vocab/quantitykind/AreicEnergyFlow> ;
    iop:hasConstraint 
        [ a iop:Constraint ;
             rdfs:label "type: transmitted" ;
             iop:constrains <https://www.wikidata.org/entity/Q900892> ;
        ] ,
        [ a iop:Constraint ;
             rdfs:label "location: below the canopy" ;
             iop:constrains <https://www.wikidata.org/entity/Q900892> ;
        ] .

<https://www.wikidata.org/entity/Q900892>
    a 
        iop:Entity ;
    rdfs:label 
        "photosynthetically active radiation" .

<https://qudt.org/vocab/quantitykind/AreicEnergyFlow>
    a 
        iop:Property ;
    rdfs:label 
        "aeric energy flux" .