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

This identifies the underlying type in a profile, when a questionnaire is generated from a profile.
NameFlagsCardTypeDescription & Constraints
Extension
0..1Base Type for answer
 
extension
?..0
 
url
?..?
 
value[x] *
1..? DataType (required)
 
 
valueCode *
1..?code DataType (required)