pathways.txt | Optional | Pathways linking together locations within stations.
levels.txt | Optional | Levels within stations.
feed_info.txt | Conditionally required | Dataset metadata, including publisher, version, and expiration information.
translations.txt | Optional | Translated information of a transit agency.
attributions.txt | Optional | Specifies the attributions that are applied to the dataset.
Plus some optional fiels are not supported, this could cuase problems when reading a writing GTFS files that have not been produced by UK2GTFS
New files have been added to GTFS spec
pathways.txt | Optional | Pathways linking together locations within stations. levels.txt | Optional | Levels within stations. feed_info.txt | Conditionally required | Dataset metadata, including publisher, version, and expiration information. translations.txt | Optional | Translated information of a transit agency. attributions.txt | Optional | Specifies the attributions that are applied to the dataset.
Plus some optional fiels are not supported, this could cuase problems when reading a writing GTFS files that have not been produced by UK2GTFS