http://hl7.org/fhir/StructureDefinition/replaces|5.2.0

This indicates a separate conformance resource instance that is superseded by the current instance.

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