This is the ValueSet that contains all the codes in SNOMED CT Route Codes (http://hl7.org/fhir/ValueSet/route-codes) and EDQM - RouteOfAdministration (http://fhir.ch/ig/ch-term/ValueSet/edqm-routeofadministration). E.g. what you have to deal with if you get resources containing codes in either of them