| AirItinerary | Air itinerary information, including a choice between (non-priced) air itinerary information or priced air itinerary information and itinerary upgrade instructions. |
| Arranger | Information about a person or entity associated with an air trip who will not be traveling. This is generally used to describe an individual or company paying for a ticket or making the travel plans. |
 BaggageInfo | Information about traveler(s) and their baggage for baggage services offers.Information about baggage associated with a traveler for allowing the offer engine to determine baggage services. |
| ConfirmedBookingInfo | Reservation details for a completed booking.
NOTE: This information only pertains to confirmed and booked reservations. All other offer criteria should be specified in the other elements in this message. |
| IncludeExclude | Service items, including service type, product group(s), and sub-group(s), to be required, included or excluded in the offer response.Airline or ATPCO encoded service family with product group(s), sub-group(s) with required, include or exclude indicators. |
| OriginDestination | Origin and Destination location and time information for the trip. |
| PresentedPurchased | Offers that have already been presented to and/or purchased during this session. |
| PricingQualifier | Additional pricing information, including restrictions, promotions and tax exemptions.Additional pricing information, including negotiated fares, restrictions, promotions and tax exemptions. |
| SeatInfo | Seats preferences and change information used for seat marketing. |
| SpecificFlight | Specific flight number and airline that availability is being requested for.Specify actual airline, flight number, or booking class |
| 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. |
| Traveler | A choice between traveler quantities and age classification OR detailed traveler information. |
| TravelPreferences | Travel preference information that applies to the entire trip, including flight type, cabin type and vendor preferences. |
| TripInsurance | Third-party trip insurance information.Information required to request third party trip insurance. |
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