| CancellationDate | Date this reservation was cancelled. |
| CancelOriginatorCode | Identifying code of the system that initiated the cancel of this reservation. |
| ForGuest | Used to determine if the ResID_Value is given to guest. |
| HotelReservationID_RPH | his is a reference placeholder, used as an index for this reservation ID. |
| ResGuestRPH | This is a reference placeholder, used as an index for this guest in this reservation. In the ResGuest object it is used like all other RPH attributes to send the delta of a reservation. It is used by the RoomStay and Service objects to indicate which guests are associated with that room stay or service. It is also used to link a guest with a ReservationID. |
| ResID_Date | Date of the creation of this reservation. |
| ResID_Source | A unique identifier to indicate the source system which generated the ResID_Value. |
| ResID_SourceContext | Additional information on Source. |
| ResID_Type | Defines the type of Reservation ID (e.g. reservation number, cancellation number). Refer to OpenTravel Code List Unique ID Type (UIT). |
| ResID_Value | This is the actual value associated with ResID_Type as generated by the system that is the source of the ResID_Type. |