{description: Search by organization which maintains the document, package_name: hl7.fhir.us.pacio-adi, name: ADIDocumentReferenceCustodian, type: reference, package_version: 2.0.0-ballot, class: unknown, kind: null, url: 'http://hl7.org/fhir/us/pacio-adi/SearchParameter/DocumentReference-custodian', version: 2.0.0-ballot}