http://hl7.org/fhir/StructureDefinition/11179-permitted-value-conceptmap|4.0.1

Expresses the linkage between the internal codes used for storage and the codes used for exchange.

element_id	types
Extension
Extension.extension
Extension.url
Extension.value[x]	canonical
Extension
Extension.id	http://hl7.org/fhirpath/System.String
Extension.extension	Extension
Extension.url	http://hl7.org/fhirpath/System.String
Extension.value[x]	canonical