description: null package_name: telus.dw.emr.extract derivation: constraint name: EffectivePeriod type: Extension elements: url: pattern: {type: Uri, value: 'https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/ext-EffectivePeriod'} index: 0 value: choices: [valuePeriod] index: 2 valuePeriod: {type: Period, choiceOf: value, index: 3} package_version: 1.0.0 class: extension kind: complex-type url: https://www.telus.com/health/fhir/dwemrextract/StructureDefinition/ext-EffectivePeriod base: http://hl7.org/fhir/StructureDefinition/Extension version: null