Booking Channel Type (BCT)
| Code value | Description |
|---|---|
| 1 | Global distribution system (GDS) |
| 2 | Alternative distribution system (ADS) |
| 3 | Sales and catering system (SCS) |
| 4 | Property management system (PMS) |
| 5 | Central reservation system (CRS) |
| 6 | Tour operator system (TOS) |
| 7 | Internet |
| 8 | Kiosk |
| 9 | Agent |