The ServiceList transaction set returns a list of all applicable ancillary services that meet request qualifiers and flights. The message supports shopping for additional a la carte services to compliment any selected offer, as well as shopping for specialty service items not generally included in an initial offer but rather based on service search filters, e.g. sports equipment specialty baggage and unaccompanied minor fees. The message also returns multi-media content at the message level and media references at the individual service level. Contains information related to errors detected during processing of the preceding request. Service List RS response information. Implementer-Augmented Structure. An instance of a distribution channel, which is a chain of intermediaries through which a good or service passes until it reaches the final buyer or the end consumer. IATA standard payload attributes