| AccountInformation | Information related to back office accounting information for the travel agency. |
| AirportDestinationPref | Identifies the preferred destination airport for travel (using IATA airport codes).Departure airport preferences, using IATA airport codes. |
 AirportOriginPref | Identifies the preferred origination airport for travel (using IATA airport codes).Departure airport preferences, using IATA airport codes. |
| AirportRoutePref | Indicates the preferred connection airport(s) (using IATA airport codes)..Departure airport preferences, using IATA airport codes. |
| CabinPref | Indicates preferred cabin(s) to be used in a search. |
| EquipPref | Indicates preferred equipment type(s) to be used in a search.Indicates preferences for type of airplane. |
| FarePref | Indicates preferred fare. |
| FareRestrictPref | Indicates preferred fare restrictions to be used in search. |
| FlightTypePref | Indicates preferred flight characteristics to be used in a search (e.g., connections, stopovers). |
| KeywordPref | This element stores data about an airline marketing keyword. |
| LoyaltyPref | Identifies the preferred loyalty program(s).Identifies a preference for a loyalty program. |
| MealPref | Indicates preferred meal type (e.g., vegetarian, Kosher, low fat)Identifies a food and beverage preference. |
| MediaEntertainPref | Media and entertainment preferences.Media and entertainment information preferences. |
| OSI_Pref | Other Service Information of the airline.Other Service Information (OSI) for relevant airlines |
| PaymentFormPref | Preferred form(s) of payment.Identifies a form of payment preference. |
| PetInfoPref | Indicates preferred information for pet accompanying traveler.Indentifies preferences regarding a pet. |
| SeatPref | Indicates preferred seat characteristics. Refer to OpenTravel Code List Seat Preference (STP) for codes. |
| SpecRequestPref | Indicates preferred special request(s) to be used with this collection of preferences.Identifies special request preference. |
| SSR_Pref | Indicates Special Service Request preference type. |
| TicketDistribPref | Indicates preferred ticket distribution method (e.g., fax, eMail, courier, mail, airport pickup)Identifies a preference for a type of ticket distribution. |
| TourCodePref | Provides the contract code for a negotiated fare. |
| TPA_Extensions | A placeholder in the schema to allow for additional elements and attributes to be included per Trading Partner Agreement (TPA).Allows extensions to be added to the OpenTravel specification per trading partner agreement. |
| VendorPref | Identifies the preferred airline carrier(s) by name. |
| AirTicketType | Type of airline ticket preferred for this collection.Specifies the type of ticket document (e.g. electronic, paper). |
| PassengerTypeCode | Category of airline passenger, using standard ATPCO codes. |
| PreferLevel | Used to indicate a level of preference for an associated item. |
| ShareMarketInd | Permission for sharing data for marketing purposes. If the value=Inherit, specifies data sharing permissions for marketing purposes. |
| ShareSynchInd | Permission for sharing data for synchronization of information held by other travel service providers. If the value=Inherit, specifies data sharing permissions for synchronization of information held by other travel service providers. |
| SmokingAllowed | Indicates smoking is allowed when true and is not allowed when false. |