description: This cross-version extension represents DataType from http://hl7.org/fhir/StructureDefinition/DataType|4.3.0 for use in FHIR R4. package_name: hl7.fhir.uv.xver-r4b.r4 derivation: constraint name: Ext_R4B_DataType type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-DataType'} index: 0 package_version: 0.0.1-snapshot-2 class: extension kind: complex-type url: http://hl7.org/fhir/4.3/StructureDefinition/extension-DataType base: http://hl7.org/fhir/StructureDefinition/Extension|4.0.1 version: 0.0.1-snapshot-2 required: [url]