http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType|5.2.0

For questionnaires generated from FHIR profiles, indicates the FHIR data type or resource type that corresponds to this node.

element_id	types
Extension
Extension.extension
Extension.url
Extension.value[x]	string
Extension
Extension.id	http://hl7.org/fhirpath/System.String
Extension.extension	Extension
Extension.url	http://hl7.org/fhirpath/System.String
Extension.value[x]	string