{
  "description": "Optional Extensions Element",
  "_filename": "SearchParameter-codesystem-extensions-CodeSystem-author.json",
  "package_name": "hl7.fhir.r4.core",
  "date": null,
  "publisher": null,
  "name": "author",
  "xpath": "f:CodeSystem/f:extension[@url='http://hl7.org/fhir/StructureDefinition/codesystem-author'] | /f:#author",
  "xpathUsage": "normal",
  "type": "string",
  "experimental": "true",
  "resourceType": "SearchParameter",
  "title": null,
  "package_version": "4.0.1",
  "status": "draft",
  "id": "d6cb4bd1-503b-4457-ab95-369733eac706",
  "kind": null,
  "url": "http://hl7.org/fhir/SearchParameter/codesystem-extensions-CodeSystem-author",
  "code": "author",
  "version": "4.0.1"
}