{description: The actual start date of the Encounter, package_name: hl7.fhir.r6.search, name: date-start, type: date, package_version: 6.0.0-ballot2, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/Encounter-date-start', version: 6.0.0-ballot2}