| AddressInfo | Detailed information on an address.Information about an address that identifies a location for a specific purposes. |
 AssociatedQuantity | Quantity or quantities that are associated with the reservation (e.g., number of seats, number of rooms, number of people). |
| CurrentStateReservation | Premodification copy of the hotel reservation.The Reservation class contains the current reservation being created or altered. |
| CustLoyalty | Loyalty program information. |
| Email | Information on an email address.Electronic email addresses, in IETF specified format. |
| EndLocation | End location associated with the reservation. |
| PaymentCard | Payment Card information.Specific payment card information. |
| PersonName | Detailed name information. |
| ReservationTimeSpan | The start and end date of the reservation. |
| StartLocation | Start location associated with the reservation. |
| TelephoneInfo | Information on a telephone number. |
| 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. |
| Vendor | Vendor or vendors associated with the reservation.Identifies a company by name. |