@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/> .

ex:someVar
    a 
        iop:Variable ;
    rdfs:label 
        "CCOV Covariance of surface water velocity" ;
    rdfs:comment
         """Covariance of the radial current vectors derived from multiple Doppler spectra. It quantifies the statistical consistency and reliability of the measured current vectors across different look directions or time intervals, helping to assess the quality and confidence of the surface current estimates.""" ;
    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:hasStatisticalModifier 
        <http://purl.obolibrary.org/obo/STATO_0000301> ;
    iop:hasProperty 
        <http://qudt.org/vocab/quantitykind/Velocity> ;
    iop:hasConstraint 
        [ a iop:Constraint ;
             rdfs:label "at the surface" ;
             iop:constrains <http://vocab.nerc.ac.uk/collection/S21/current/S21S027/> ;
        ] .

<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://purl.obolibrary.org/obo/STATO_0000301>
    a 
        iop:StatisticalModifier ;
    rdfs:label 
        "covariance" .

<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" .