Proposed features/Key:gtfs:trip id
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Please, use gtfs:shape_id=* if present in
shapes.txt as it better fits.
gtfs:trip_id=* is evaluated by PTNA to link from the analysis to the GTFS data if additionally network:guid=*, operator:guid=* or gtfs:feed=* is present (example).
Adding the gtfs:route_id=* does not harm but is not needed as it is derivable from gtfs:trip_id:sample=*
Two different name spaces
Currently, two different name spaces are used for GTFS,