description: 'Flag denoting whether parent item is preferred - e.g., a preferred address or telephone number. DEPRECATED: Use rank element or extension instead' package_name: hl7.fhir.uv.extensions.r5 derivation: constraint name: Preferred type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/iso21090-preferred'} type: uri index: 1 value: choices: [valueBoolean] index: 3 valueBoolean: {type: boolean, choiceOf: value, index: 4} package_version: 5.3.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/iso21090-preferred base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.3.0-ballot required: [value, valueBoolean]