{"resourceType":"SearchParameter","id":"ValueSet-reference","extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status","valueCode":"trial-use"}],"url":"http://hl7.org/fhir/SearchParameter/ValueSet-reference","version":"4.0.1","name":"reference","status":"draft","experimental":false,"date":"2021-01-17T07:06:13+11:00","publisher":"Health Level Seven International (Vocabulary)","contact":[{"telecom":[{"system":"url","value":"http://hl7.org/fhir"}]},{"telecom":[{"system":"url","value":"http://www.hl7.org/Special/committees/Vocab/index.cfm"}]}],"description":"A code system included or excluded in the value set or an imported value set","code":"reference","base":["ValueSet"],"type":"uri","expression":"ValueSet.compose.include.system","xpath":"f:ValueSet/f:compose/f:include/f:system","xpathUsage":"normal"}