{description: The actual start date of the Encounter (Backport from R5). The parameter cannot repeat or have multiple values., package_name: accdr.fhir.ig.pkg, name: date-start, type: date, package_version: 0.9.28, class: unknown, kind: null, url: 'http://ontariohealth.ca/fhir/accdr/SearchParameter/Encounter-date-start', version: 4.0.1}