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

The human-readable name for the code system.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/string