http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType|4.0.1

For questionnaires generated from FHIR profiles, indicates the FHIR data type or resource type that corresponds to this node.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/string