http://hl7.org/fhir/StructureDefinition/questionnaire-referenceResource|5.2.0
Where the type for a question is \"Reference\", indicates a type of resource that is permitted.
| type | destination |
|---|---|
| baseDefinition | http://hl7.org/fhir/StructureDefinition/Extension |
| type | http://hl7.org/fhir/StructureDefinition/Extension |
| Extension.value[x].type | http://hl7.org/fhir/StructureDefinition/code |
| Extension.value[x].binding.valueSet | http://hl7.org/fhir/ValueSet/resource-types |