{description: '[CodeSystem](codesystem.html): The time during which the CodeSystem is intended to be in use\r\n', package_name: hl7.fhir.r6.search, name: effective, type: date, package_version: 6.0.0-ballot3, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/MetadataResource-effective', version: 6.0.0-ballot3}