{"resourceType":"SearchParameter","id":"Observation-value-date","extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status","valueCode":"trial-use"}],"url":"http://hl7.org/fhir/SearchParameter/Observation-value-date","version":"4.0.1","name":"value-date","status":"draft","experimental":false,"date":"2021-01-17T07:06:13+11:00","publisher":"Health Level Seven International (Orders and Observations)","contact":[{"telecom":[{"system":"url","value":"http://hl7.org/fhir"}]},{"telecom":[{"system":"url","value":"http://www.hl7.org/Special/committees/orders/index.cfm"}]}],"description":"The value of the observation, if the value is a date or period of time","code":"value-date","base":["Observation"],"type":"date","expression":"(Observation.value as dateTime) | (Observation.value as Period)","xpath":"f:Observation/f:valueDateTime | f:Observation/f:valuePeriod","xpathUsage":"normal","comparator":["eq","ne","gt","ge","lt","le","sa","eb","ap"]}