Barclays Airline Data . You cannot process a cash advance and airline data in the same transaction. Airline Data Processing The following table describes various features for airline data processing with Barclays. Table 15 Airline Data Processing Features for Barclays Feature Description Supported Card Types VisaMastercardMaestro (UK Domestic)Maestro (International) Travel Legs Maximum number of travel legs: 99Numbering for the travel legs: 0 to 98 You must include information for at least the first leg of the trip (leg 0). You must use consecutive numbers for the legs; do not skip a number. If you skip a number, CyberSource ignores the legs that follow the skipped number. Specification used by CyberSource to implement airline data processing APACS 29, version 18