Previous versions of Thema are still available 1.3 1.2 1.1 1.0.
Browse the Thema subject categories hierarchy, or search for a specific term within the hierarchy.
|W||Lifestyle, Hobbies and Leisure
Use all W* codes for: popular accounts for general adult readership. DO NOT USE: code ‘W’ itself, but select specific categories from section W*. Use all W* codes with: other subject categories and qualifiers where appropriate.
Prefer: codes from A*, K*, P*, R*, T*, etc, for specialist, technical and academic works
|WG||Transport: general interest
See also: KNG Transport industries, TR* Transport technology and trades and its subcategories
|WGF||Trains and railways: general interest
Class here: company histories, maps and atlases, general works on railways.
See also: TRF* Railway technology, engineering and trades and its subcategories
|WGFD||Locomotives and rolling stock
Class here: steam, diesel or electric locomotives, wagons, carriages etc
|WGFL||Urban rail transit systems
Class here: underground and light rail systems (metro, subway, tube, etc), trams on rails, monorail, and any urban transit or transport system based on fixed rails
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