description: Clinically relevant time-period for questionnaire response. package_name: dk.ehealth.sundhed.fhir.ig.core derivation: constraint name: ehealth-effectivePeriod type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://ehealth.sundhed.dk/fhir/StructureDefinition/ehealth-effectivePeriod'} index: 1 value: choices: [valuePeriod] index: 3 valuePeriod: {type: Period, choiceOf: value, index: 4} package_version: 3.5.1 extensions: {} class: extension kind: complex-type url: http://ehealth.sundhed.dk/fhir/StructureDefinition/ehealth-effectivePeriod base: http://hl7.org/fhir/StructureDefinition/Extension version: 3.5.1 required: [valuePeriod, value]