This document provides definitions and terminology related to producing General Transit Feed Specification (GTFS) data from geospatial vector data. It discusses stops, routes, trips, shapefiles, coordinate reference systems, QGIS, PostgreSQL/PostGIS, and the shp2GTFS tool. The document outlines how to use these tools and technologies to create GTFS feeds from shapefile data in QGIS, store the data in a PostgreSQL/PostGIS database, and convert it to GTFS format using the custom shp2GTFS Python script.