f:ValueSet
extension with URL = 'http://hl7.org/fhir/StructureDefinition/valueset-authoritativeSource': maximum cardinality of 'extension' is 1
extension with URL = 'http://hl7.org/fhir/StructureDefinition/valueset-rules-text': maximum cardinality of 'extension' is 1
extension with URL = 'http://hl7.org/fhir/StructureDefinition/valueset-expression': maximum cardinality of 'extension' is 1
extension with URL = 'http://hl7.org/fhir/StructureDefinition/valueset-supplement': maximum cardinality of 'extension' is 1