Data Model Here is a rough idea of how the data model is set up. It does not indicate relationships. Content (names, text, images, maps, links, documents) Activity (yes/no) Relationships are outlined here: Organisations Railways Rolling Stock Trains Stations Lines Taxonomic Data Gauges Broad 1445mm – Italian Broad Gauge Narrow 1000mm – Metre 1067mm – Three Foot Six Inch 1219mm – Four Foot 1372mm – Four Foot Six Inch 1432mm 600mm 610mm – Two Foot 686mm – Two Foot Three Inch 750mm 760mm – Bosnian Gauge 762mm – Two Foot Six Inch 891mm – Swedish Three-Foot 900mm 914mm – Three-Foot 950mm – Italian Metre Standard 1435mm Line Types Branch Loop Main Section Organisation Types Manufacturer Operator Owner Railway Regions International Local National Regional Rolling Stock Types Locomotive Diesel and Diesel Electric Electric Other Steam Articulated Fairlie Garratt Mallet Meyer Expansion Compound Simple Fixed Duplex Standard Unpowered Freight Wagons Box Combination Flat Hopper Tank Non-Revenue Ballast Caboose Clearance Crew Guard Passenger Coaches Dining Observation Sleeping Standard Station Facilities Fuel Servicing Workshop Station Types Hault Siding Station Usage Freight Mixed Passenger Specialised Funicular Military Mining Monorails Rack Service and Repair Trams Wrecking