@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#> .

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

example:unixUserId
    rdf:type rdfs:Datatype ;
    owl:onDatatype xsd:string ;
    owl:withRestrictions (
        [ xsd:maxLength 8 ]
    ) ;
    sdml:srcLabel "unixUserId" ;
    rdfs:isDefinedBy example: .