| BestAvailableRates | A collection of the best rates available. |
| Delta | Incremental amount added to the hurdle rate (e.g. Amount= 20 USD and Ceiling=5, the maximum Delta would be 100 USD). |
| HurdleRate | Restriction based on the minimum rate to be considered for availability, ex. can sell weekend rate only if charging the hurdle rate or more. |
| LengthsOfStay | Collection of Length of Stay elements. These LOS elements indicate what LOS restrictions are to be added or removed. Some systems include this information directly with the Availability Status as opposed to the booking restriction.A collection of LengthOfStay. |
| RestrictionStatus | Availability status assigned to the room rate combination. |
| StatusApplicationControl | Information on what the AvailStatus Message applies to (i.e. the combination of inventory and rate codes) and the period of application.The StatusApplicationControl class is used to indicate to which block codes/rate plans/inventory codes a status should be applied. |
| UniqueID | The unique identifier element allows the trading partners to uniquely identify each AvailStatusMessage, for tracing of transactions.An identifier used to uniquely reference an object in a system (e.g. an airline reservation reference, customer profile reference, booking confirmation number, or a reference to a previous availability quote). |
| BookingLimit | Number of units of inventory that can be sold. |
| BookingLimitMessageType | An enumerated type defining the function of the booking limit message. Values: RemoveLimit, SetLimit, AdjustLimit. |
| BookingThreshold | Number of units down to which inventory can be sold. |
| LocatorID | Can be used to communicate back to the sender exactly which transaction may have had a problem (e.g. "Message 214 had an invalid date range"). |
| Override | Mechanism to allow the user to override settings at the reservation system and to allow the RMS to replace this overridden values: If value = "false", the reservations system may ignore the settings passed and keep values overridden by the user. If value = "true", the reservations system must replace values overridden by the user. |
| RoomGender | Used to request or specify a gender assignment for a room. Note: Typically used by Hosteliers. |
| SharedRoomInd | If TRUE, the room requires or has sharing available. Note: Typically used by Hosteliers. |