description: Indicates the time-period (from 'now') to search for observations that match the Questionnaire.item.code and Questionnaire.subject when pre-populating the QuestionnaireResponse.
package_name: hl7.fhir.uv.sdc.r4b
derivation: constraint
name: ObservationLinkPeriodExtension
type: Extension
elements:
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-observationLinkPeriod'}
    index: 0
  value:
    choices: [valueDuration]
    index: 2
  valueDuration: {type: Duration, choiceOf: value, index: 3}
package_version: 3.0.0
class: extension
kind: complex-type
url: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-observationLinkPeriod
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 3.0.0