{description: Data Element for Expression.expression, package_name: hl7.fhir.r4.elements, derivation: specialization, name: Expression.expression, type: Expression.expression, package_version: 4.0.1, class: logical, kind: logical, url: 'http://hl7.org/fhir/StructureDefinition/de-Expression.expression', base: 'http://hl7.org/fhir/StructureDefinition/Element', version: 4.0.1}