{"code":"effective","description":"Optional Extensions Element","experimental":true,"id":"valueset-extensions-ValueSet-effective","name":"effective","resourceType":"SearchParameter","status":"draft","type":"date","url":"http://hl7.org/fhir/SearchParameter/valueset-extensions-ValueSet-effective","version":"4.3.0","xpath":"f:ValueSet/f:extension[@url='http://hl7.org/fhir/StructureDefinition/valueset-effectiveDate'] | /f:#effectiveDate","xpathUsage":"normal"}