@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix obo_purl: <http://purl.obolibrary.org/obo/> . @prefix owl: <http://www.w3.org/2002/07/owl#> . obo_purl:has_prefix a owl:ObjectProperty . 
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix obo_purl: <http://purl.obolibrary.org/obo/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

obo_purl:has_prefix
    a owl:ObjectProperty .