description: The URL pointing to a FHIR-defined protocol, guideline, orderset or other definition that is adhered to in whole or in part by the event or request resource. package_name: hl7.fhir.uv.extensions derivation: constraint name: InstantiatesCanonical type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/workflow-instantiatesCanonical'} index: 1 value: choices: [valueCanonical] index: 3 valueCanonical: {type: canonical, choiceOf: value, index: 4} package_version: 5.3.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/workflow-instantiatesCanonical base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.3.0-ballot required: [valueCanonical, value]