description: This cross-version extension represents List.source from http://hl7.org/fhir/StructureDefinition/List|4.3.0 for use in FHIR R5. package_name: hl7.fhir.uv.xver-r4b.r5 derivation: constraint name: ext_R4B_List_source type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Who and/or what defined the list contents (aka Author) choices: [valueReference] index: 1 valueReference: short: Who and/or what defined the list contents (aka Author) refers: ['http://hl7.org/fhir/StructureDefinition/Device', 'http://hl7.org/fhir/StructureDefinition/Patient', 'http://hl7.org/fhir/StructureDefinition/Practitioner', 'http://hl7.org/fhir/StructureDefinition/PractitionerRole'] type: Reference base: {path: 'Extension.value[x]'} choiceOf: value index: 2 url: pattern: {type: Uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-List.source'} index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/4.3/StructureDefinition/extension-List.source base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]