assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:2218 IAO:0000115 A blood coagulation disease that is characterized by an abnormal increase or decrease in platelets or platelet dysfunction. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.merckmanuals.com/home/blood-disorders/platelet-disorders/overview-of-platelet-disorders""}]}"