GTFS Schedule is a feed specification that defines a common format for static public transportation information. It is composed of a collection of simple files, mostly text files (.txt) that are contained in a single ZIP file.

Each file describes a particular aspect of transit information such as stops, routes, trips, etc. At its most basic form, a GTFS Schedule dataset is composed of 7 files: agency.txt, routes.txt, trips.txt, stops.txt, stop_times.txt, calendar.txt and calendar_dates.txt.