@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/Salinity>
    a 
        iop:Variable ;
    rdfs:label 
        "Practical salinity of sea surface water" ;
    rdfs:comment 
        """Practical salinity is defined by the quantity of dissolved ions expressed on a scale (PSS-78) based on the conductivity ratio of a seawater sample to a standard KCl solution.""" ;
    iop:hasObjectOfInterest 
        <http://vocabs.lter-europe.net/EnvThes/22225> ;
    iop:hasMatrix 
        <http://purl.obolibrary.org/obo/ENVO_01001581> ;
    iop:hasProperty 
        <http://vocab.nerc.ac.uk/collection/S06/current/S0600083/> .

<http://vocabs.lter-europe.net/EnvThes/22225>
    a 
        iop:Entity ;
    rdfs:label 
        "water" .

<http://purl.obolibrary.org/obo/ENVO_01001581>
    a 
        iop:Entity ;
    rdfs:label 
        "sea surface layer" .

<http://vocab.nerc.ac.uk/collection/S06/current/S0600083/>
    a 
        iop:Property ;
    rdfs:label 
        "practical salinity" .