description: This cross-version extension represents Provenance.agent.userId from http://hl7.org/fhir/StructureDefinition/Provenance|1.0.2 for use in FHIR R4. package_name: hl7.fhir.uv.xver-r2.r4 derivation: constraint name: ext_R2_Provenance_ag_userId type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Authorization-system identifier for the agent choices: [valueIdentifier] index: 1 valueIdentifier: base: {path: 'Extension.value[x]'} type: Identifier short: Authorization-system identifier for the agent choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-Provenance.agent.userId'} type: uri index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/1.0/StructureDefinition/extension-Provenance.agent.userId base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]