My understanding was always that anyone can make up their own tags for their own specialist purposes, but you shouldn't use well-known tags in an unintended way.
Nick ________________________________ From: Michael Tsang <[email protected]> Sent: 16 January 2026 23:45 To: [email protected] <[email protected]> Subject: Re: [Talk-GB] Public transport station mapping quality for use with a journey planner Check the documentation of gtfs:stop_id please. This new tag is totally appropriate that I'm tagging the ID used in a GTFS feed. The feed is currently used in Transitous which serves the routing in Great Britain. OpenStreetMap is a database where everyone can make up tags, including for specialist applications. The other naptan:AtcoCode tags on other railway platforms (e.g. tube and DLR platforms) can be found in the TfL timetable data.
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