@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/> .

<https://vocab.nerc.ac.uk/collection/P01/current/RXUD412E/>
    a 
        iop:Variable ;
    rdfs:label 
        "Downwelling vector irradiance as energy of electromagnetic radiation (412nm wavelength) in the water body by cosine-collector radiometer" ;
    rdfs:comment 
        """The vertical component of light at the specified wavelength travelling downwards.""" ;
    iop:hasObjectOfInterest 
        <http://vocab.nerc.ac.uk/collection/S18/current/S1800004/> ;
    iop:hasMatrix 
        <https://vocab.nerc.ac.uk/collection/S21/current/S21S027/> ;
    iop:hasProperty 
        <https://vocab.nerc.ac.uk/collection/S06/current/S0600131/> ;
    iop:hasConstraint 
        [ a iop:Constraint ;
             rdfs:label "412nm wavelength" ;
             rdfs:comment """The spatial period of a sinusoidal wave in nanometer.""" ;
             iop:constrains <http://vocab.nerc.ac.uk/collection/S18/current/S1800004/> ;
        ] .

<http://vocab.nerc.ac.uk/collection/S18/current/S1800004/>
    a 
        iop:Entity ;
    rdfs:label 
        "electromagnetic radiation" ;
    rdfs:comment 
        """The waves or particles (photons) of the electromagnetic field that propagate through space carrying energy; it includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-radiation and gamma radiation.""" .

<https://vocab.nerc.ac.uk/collection/S21/current/S21S027/>
    a 
        iop:Entity ;
    rdfs:label 
        "water body" ;
    rdfs:comment 
        """A distinct and significant volume of fresh or salt water on the Earth's surface. Includes oceans, seas, estuaries, rivers, ponds and lakes.""" .

<https://vocab.nerc.ac.uk/collection/S06/current/S0600131/>
    a 
        iop:Property ;
    rdfs:label 
        "Downwelling vector irradiance as energy" ;
    rdfs:comment 
        """The downward vertical component of light as electromagnetic radiation energy.""" .