{"resourceType":"SearchParameter","id":"MessageHeader-event","extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status","valueCode":"trial-use"}],"url":"http://hl7.org/fhir/SearchParameter/MessageHeader-event","version":"4.0.1","name":"event","status":"draft","experimental":false,"date":"2021-01-17T07:06:13+11:00","publisher":"Health Level Seven International (Infrastructure And Messaging)","contact":[{"telecom":[{"system":"url","value":"http://hl7.org/fhir"}]},{"telecom":[{"system":"url","value":"http://www.hl7.org/special/committees/inm/index.cfm"}]}],"description":"Code for the event this message represents or link to event definition","code":"event","base":["MessageHeader"],"type":"token","expression":"MessageHeader.event","xpath":"f:MessageHeader/f:eventCoding | f:MessageHeader/f:eventUri","xpathUsage":"normal"}