description: Instant from which the request is being initiated. package_name: hl7.fhir.us.davinci-pct derivation: constraint name: RequestInitiationTime type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/davinci-pct/StructureDefinition/requestInitiationTime'} index: 1 value: short: Estimate Request instant choices: [valueInstant] index: 3 valueInstant: {type: instant, short: Estimate Request instant, choiceOf: value, index: 4} package_version: 2.0.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/davinci-pct/StructureDefinition/requestInitiationTime base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0 required: [valueInstant, value]