assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:8986 IAO:0000115 A sleep disorder that involves an excessive urge to sleep at inappropriate times, such as while at work. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://en.wikipedia.org/wiki/Narcolepsy""}]}"