http://semanticscience.org/ontology/sio.owl
http://www.w3.org/2004/02/skos/core#exactMatch
@prefix owl: <http://www.w3.org/2002/07/owl#> . @prefix skos: <http://www.w3.org/2004/02/skos/core#> . skos:exactMatch a owl:AnnotationProperty .