{ "description": "Optional Extensions Element", "_filename": "SearchParameter-codesystem-extensions-CodeSystem-effective.json", "package_name": "rs/hl7.fhir.r3.examples", "date": null, "publisher": null, "name": "effective", "xpath": "f:CodeSystem/f:extension[@url='http://hl7.org/fhir/StructureDefinition/codesystem-effectiveDate'] | /f:#effectiveDate", "xpathUsage": "normal", "type": "date", "experimental": "true", "resourceType": "SearchParameter", "title": null, "package_version": "3.0.2", "status": "draft", "id": "ac17ae65-661f-44b6-81d4-48b218047d69", "kind": null, "url": "http://hl7.org/fhir/SearchParameter/codesystem-extensions-CodeSystem-effective", "code": "effective", "version": null }