@prefix UO: <http://purl.obolibrary.org/obo/UO_> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix unit: <https://w3id.org/uom/> .

unit:SI_code a owl:AnnotationProperty ;
    rdfs:label "SI code" .

unit:UCUM_code a owl:AnnotationProperty ;
    rdfs:label "UCUM code" .

unit:ng.mL-1 a owl:NamedIndividual ;
    rdfs:label "nanogram per millilitre"@en ;
    skos:definition "A unit which is equal to 10⁻⁹ gram per 10⁻³ litre."@en ;
    skos:exactMatch UO:0000275,
        unit:ng.mdm3-1,
        unit:ng.ml-1 ;
    unit:SI_code "ng mL-1" ;
    unit:UCUM_code "ng.mL-1",
        "ng/mL" .