| AdvancePurchaseInd | If true, advanced purchase is required for this seat. |
| AirBookDesigCode | Allows that a seat may be assigned a class code.Used for an Alpha String, length 1 to 2 (for letter codes). |
| AvailableInd | If true, this seat is available. |
| InoperativeInd | If true, this seat is not operational. |
| OccupiedInd | If true, this seat is occupied and/or already reserved. |
| RowNumber | Specifies the actual (physical) row number in the seat map. |
| RPH | A unique ID for this seat that may be used elsewhere in the message. |
| SeatNumber | The seat number that includes row number and seat section, e.g. "2C". |
| SeatSection | Actual seat number within a particular row, typically A, B etc. |
| SeatSequenceNumber | The absolute sequence of seat within a row that describes seats and locations outside the physical sequence, e.g. aisles, galleys or jumpseats. |