A recommended column is missing in the input file.
[1] missing_recommended_column rule reference
| Code | missing_recommended_column |
|---|---|
| Standard | GTFS |
| Source | MobilityData canonical GTFS Schedule validator |
| Category | quality |
| Maturity | deprecated |
| Tags | mobilitydata, gtfs, quality, deprecated |
| Retrieved | 2026-06-12 |
| Reference | https://gtfs-validator.mobilitydata.org/rules.html#missing_recommended_column |
