description: Planned period of service the request is about package_name: hl7.fhir.us.davinci-pct derivation: constraint name: PlannedServicePeriod type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/davinci-pct/StructureDefinition/plannedServicePeriod'} index: 1 value: short: Planned period of service the request is about choices: [valuePeriod] index: 3 valuePeriod: {type: Period, short: Planned period of service the request is about, choiceOf: value, index: 4} value[x]: elements: start: {index: 5} end: {mustSupport: true, index: 6} required: [start] package_version: 2.0.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/davinci-pct/StructureDefinition/plannedServicePeriod base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0 required: [valuePeriod, value]