{description: Used when a search is performed in a context which doesn't limit the search to indicate which types are being searched. See the FHIR search page for further discussion, package_name: hl7.fhir.r4b.core, name: _type, type: token, package_version: 4.3.0, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/Resource-type', version: 4.3.0}