http://hl7.org/fhir/StructureDefinition/codesystem-usage|4.0.1

Consumers of the value set and the implementations, projects or standards that the author has utilized the value set in.

Name	Card	Type	Description & Constraints
Extension	0..*		Who has used and how?
extension *	1..1	Extension	A consumer of or client for the value set
extension	?..0
url	?..?	uri
value[x] *	1..?
valueString *	1..?	string
extension *	1..1	Extension	Implementation/project/standard that uses value set
extension	?..0
url	?..?	uri
value[x] *	1..?
valueString *	1..?	string
url	?..?
value[x]	0..0