{ "resourceType": "SearchParameter", "id": "patient-extensions-Patient-mothersMaidenName", "url": "http://hl7.org/fhir/SearchParameter/patient-extensions-Patient-mothersMaidenName", "version": "4.0.1", "name": "mothersMaidenName", "status": "draft", "experimental": true, "description": "Search based on patient's mother's maiden name", "code": "mothersMaidenName", "base": [ "Patient" ], "type": "string", "expression": "Patient.extension('http://hl7.org/fhir/StructureDefinition/patient-extensions-Patient-mothersMaidenName')", "xpathUsage": "normal" }