{description: 'The reason why the expected value in the element Observation.value[x] is missing.', package_name: hl7.fhir.r4.examples, name: data-absent-reason, type: token, package_version: 4.0.1, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/Observation-data-absent-reason', version: 4.0.1}