http://hl7.org/fhir/StructureDefinition/valueset-conceptOrder|5.2.0

Identifies the relative order in which concepts within the value set should be presented to a user.
NameFlagsCardTypeDescription & Constraints
Extension
0..1Appearance order for user selection
 
extension
?..0
 
url
?..?
 
value[x] *
1..?
 
 
valueInteger *
1..?integer