description: Preferred language of the person using the system. package_name: hl7.fhir.core derivation: constraint name: systemUserLanguage type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/cqf-systemUserLanguage'} index: 1 valueCodeableConcept: type: CodeableConcept binding: {strength: preferred, valueSet: 'http://hl7.org/fhir/ValueSet/languages'} index: 2 package_version: 3.5.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/cqf-systemUserLanguage base: http://hl7.org/fhir/StructureDefinition/Extension version: null