{description: The period during which the participatingOrganization is affiliated with the primary organization, package_name: hl7.fhir.r5.search, name: date, type: date, package_version: 5.0.0, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/OrganizationAffiliation-date', version: 5.0.0}