Domain reference for the freight this plant receives — wagon families, the load-type code key, known codes, railway zones, and the wagon-number scheme. This is the foundation future features build on.
A code like BOXNHL reads left to right:
| B | Bogie wagon — 4-axle system (not the legacy 2-axle design) |
| O | Open top (gondola profile) |
| X | High-sided walls |
| N | Pneumatic / air-brake system |
| C | Covered (weather-protected body) |
| HL | Higher Load — lighter materials (e.g. ferritic stainless steel) cut deadweight |
| S | Specialized / high-capacity 25T axle-load variant |
Painted on every wagon; not in the FOIS feed, but decoded here for numbers captured elsewhere.
| Digits | Field | Note |
|---|---|---|
| 1-2 | Type of wagon | e.g. 10-14 denote open-wagon series like BOXN variants |
| 3-4 | Owning railway zone | e.g. 01 Central Railway, 02 Eastern Railway |
| 5-6 | Year of manufacture | two-digit year |
| 7-10 | Serial number | unique wagon serial identification |
| 11 | Check digit | system integrity check |