http://hl7.org/fhir/StructureDefinition/valueset-system|4.0.1

Allows a direct reference to the code system for FHIR query.
NameFlagsCardTypeDescription & Constraints
Extension
0..1Code system resource
 
extension
?..0
 
url
?..?
 
value[x] *
1..?
 
 
valueCanonical *
1..?canonical