| AgentDutyCode | An authority code assigned to a requestor. |
| AgentSine | Identifies the party within the requesting entity. |
| AirlineVendorID | The IATA assigned airline code.Used for an Upper Alpha String and Numeric, length 2 to 3. |
| AirportCode | The IATA assigned airport code.Used for an Upper Alpha String and Numeric, length 3 to 5. |
| ERSP_UserID | Electronic Reservation Service Provider (ERSP) assigned identifier used to identify the individual using the ERSP system. |
| FirstDepartPoint | The point of first departure in a trip.Used for Strings, length exactly 3. |
| ISOCountry | The country code of the requesting party in ISO 3166-3 encoding. |
| ISOCurrency | The currency code in which the reservation will be ticketed in ISO 4217-3 encoding. |
| PseudoCityCode | An identification code assigned to an office/agency by a reservation system. |
| TerminalID | This is the electronic address of the device from which information is entered. |