{description: Search by time of service that is being documented, package_name: rs/hl7.fhir.us.pacio, name: ADIDocumentReferencePeriod, type: date, package_version: adi-1.0.0, class: unknown, kind: null, url: 'http://hl7.org/fhir/us/pacio-adi/SearchParameter/DocumentReference-period', version: 1.0.0}