description: The original date/period that was requested by the submitter for this item. package_name: hl7.fhir.us.davinci-pas derivation: constraint name: ItemRequestedServiceDate type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/davinci-pas/StructureDefinition/extension-itemRequestedServiceDate'} index: 1 value: choices: [valueDateTime, valuePeriod] index: 3 valueDateTime: {type: dateTime, choiceOf: value, index: 4} valuePeriod: {type: Period, choiceOf: value, index: 5} package_version: 2.1.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/davinci-pas/StructureDefinition/extension-itemRequestedServiceDate base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.1.0