{
  "description": null,
  "_filename": "SearchParameter-codesystem-extensions-CodeSystem-effective.json",
  "package_name": "rs/hl7.fhir.r2b.core",
  "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": null,
  "resourceType": "SearchParameter",
  "title": null,
  "package_version": "1.4.0",
  "status": null,
  "id": "feb4c1db-5cc3-49d8-9306-008c49c9fc41",
  "kind": null,
  "url": "http://hl7.org/fhir/SearchParameter/codesystem-extensions-CodeSystem-effective",
  "code": "effective",
  "version": null
}