description: This cross-version extension represents Money.system from http://hl7.org/fhir/StructureDefinition/Money|3.0.2 for use in FHIR R4. package_name: hl7.fhir.uv.xver-r3.r4 derivation: constraint name: ext_R3_Money_system type: Extension elements: value: base: {path: 'Extension.value[x]'} short: System that defines coded unit form choices: [valueUri] index: 1 valueUri: base: {path: 'Extension.value[x]'} type: uri short: System that defines coded unit form choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/3.0/StructureDefinition/extension-Money.system'} type: uri index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/3.0/StructureDefinition/extension-Money.system base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]