From the GTFS specification, ["Field types" section] for ID.
An ID field value is an internal ID, not intended to be shown to riders, and is a sequence of any UTF-8 characters. Using only printable ASCII characters is recommended. An ID is labeled "unique ID" when it must be unique within a file.
When the type is marked as Unique ID I think it should be an ERROR severity instead of a WARNING.
From the GTFS specification, ["Field types" section] for
ID.When the type is marked as
Unique IDI think it should be anERRORseverity instead of aWARNING.The relevant code path seems to be here.
https://github.com/etalab/transport-validator/blob/0d120e25e68a4741d156f085f7f04affe51810a7/src/validators/raw_gtfs.rs#L23-L40
a duplicate ID for
stops.idshould be anERROR. Other fields should be reviewed, we could check for more duplicates as well.