| ADA_Requirement | Passenger ADA requirements. Refer to OpenTravel Disability Feature Code (PHY) code list. |
| DefaultStatusCode | The default status from the rail operators. Refer to the OpenTravel Code List named Status (STS). |
| LookupKey | Database key to retrieve the other part of the card number. |
| NumberInParty | Number of passengers that will benefit from the request. |
| PreferLevel | Used to indicate a level of preference for an associated item. |
| Remark | Text that description of the service request. |
| SSR_Code | Code of the special service request to be used for this rail travel situation. Refers to standard industry code list.Used for an Alpha String, length exactly 4. |
| TransferActionType | Indicates in what condition the element must be trasnferred to the booking. |
| VendorCode | Indicates to which rail operator the element is associated. |
| VendorPrefRPH | Reference to one or more rail operators in VendorPref. |