description: The portion of the family name that is derived from the person's father. package_name: hl7.fhir.r3.examples derivation: constraint name: fathers-family type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/humanname-fathers-family'} index: 1 valueString: {type: string, index: 2} package_version: 3.0.2 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/humanname-fathers-family base: http://hl7.org/fhir/StructureDefinition/Extension version: null