{description: Free text description of the objective of the study, package_name: hl7.fhir.r5.search, name: objective-description, type: string, package_version: 5.0.0-draft-final, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/ResearchStudy-objective-description', version: 5.0.0-draft-final}