| Description |
| Used for Numeric Strings, length 1 to 16. |
| Type : NumericStringLength1to16 |
| Definition |
| Provides a reference number for the guest. |
| Parents |
| \OTA_CruiseBookRQ\ReservationInfo\GuestDetails\GuestDetail\ContactInfo
\OTA_CruiseBookRS\BookingPayment\GuestPrices\GuestPrice |