@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/HFR> .

ex:RadVelErrHF
    a 
        iop:Variable ;
    rdfs:label 
        "RDVA Radial velocity (away from) of water current relative to instrument in the water body by High Frequency Radar" ;
    rdfs:comment 
        """Component of the sea surface current velocity that is directed toward (negative values) or away from (positive values) the High Frequency Radar (HFR) antenna, measured along the lines of sight of the antenna, i.e. along radial lines centered at the HFR antenna.""" ;
    iop:hasObjectOfInterest 
        <http://vocab.nerc.ac.uk/collection/S29/current/PE001307/> ;
    iop:hasMatrix 
        <http://vocab.nerc.ac.uk/collection/S21/current/S21S027/> ;
    iop:hasContextObject 
        <http://opendata.inrae.fr/thesaurusINRAE/c_1384> ;
    iop:hasProperty 
        <http://qudt.org/vocab/quantitykind/Velocity> ;
    iop:hasConstraint 
        [ a iop:Constraint ;
             rdfs:label "relative to instrument" ;
             iop:constrains <http://qudt.org/vocab/quantitykind/Velocity> ;
        ] ,
        [ a iop:Constraint ;
             rdfs:label "at the surface" ;
             iop:constrains <http://vocab.nerc.ac.uk/collection/S21/current/S21S027/> ;
        ] ,
        [ a iop:Constraint ;
             rdfs:label "positive away from the instrument" ;
             iop:constrains <http://qudt.org/vocab/quantitykind/Velocity> ;
        ] ,
        [ a iop:Constraint ;
             rdfs:label "radial" ;
             iop:constrains <http://qudt.org/vocab/quantitykind/Velocity> ;
        ] .

<http://vocab.nerc.ac.uk/collection/S29/current/PE001307/>
    a 
        iop:Entity ;
    rdfs:label 
        "water current" .

<http://vocab.nerc.ac.uk/collection/S21/current/S21S027/>
    a 
        iop:Entity ;
    rdfs:label 
        "water body" .

<http://qudt.org/vocab/quantitykind/Velocity>
    a 
        iop:Property ;
    rdfs:label 
        "velocity" .

<http://opendata.inrae.fr/thesaurusINRAE/c_1384>
    a 
        iop:Entity ;
    rdfs:label 
        "sea" .