assertion retraction graph subject predicate object datatype annotation 1 0 graph oio:id IAO:0000115 An identifier for an individual entity. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://purl.obolibrary.org/obo/IAO_0020000""}]}"