@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sdml: <http://sdml.io/sdml-owl.ttl#> .

campaign:
    rdf:type
        owl:Ontology ,
        sdml:Module ;
    sdml:srcLabel "campaign" .

campaign:Duration
    rdf:type
        owl:Class ,
        sdml:Structure ;
    sdml:srcLabel "Duration" ;
    rdfs:isDefinedBy campaign: .