@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:snow_amount
    a 
        iop:Variable ;
    rdfs:label 
        "Snowfall amount" ;
    rdfs:comment 
        """snowfall amount measured in mm.""" ;
    iop:hasObjectOfInterest 
        <http://vocab.nerc.ac.uk/collection/P29/current/snow/> ;
    iop:hasProperty 
        <https://qudt.org/vocab/quantitykind/Depth> ;
    iop:hasConstraint 
        [ a iop:Constraint ;
             rdfs:label "origin: snowfall" ;
             iop:constrains <http://vocab.nerc.ac.uk/collection/P29/current/snow/> ;
        ] ,
        [ a iop:Constraint ;
             rdfs:label "datum: relative to the compacted snow base" ;
             iop:constrains <https://qudt.org/vocab/quantitykind/Depth> ;
        ] .

<http://vocab.nerc.ac.uk/collection/P29/current/snow/>
    a 
        iop:Entity ;
    rdfs:label 
        "snow" .

<https://qudt.org/vocab/quantitykind/Depth>
    a 
        iop:Property ;
    rdfs:label 
        "depth" .