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

Where the type for a question is \"Reference\", indicates a profile that the resource instances pointed to in answers to this question must be valid against.
NameFlagsCardTypeDescription & Constraints
Extension
0..*Allowed profile for reference
 
extension
?..0
 
url
?..?
 
value[x] *
1..?
 
 
valueCanonical *
1..?canonical