Thema Subject Categories 1.3

Previous versions of Thema are still available 1.2 1.1 1.0.

Browse the Thema subject categories hierarchy, or search for a specific term within the hierarchy.

See the search hints below.

Notation Category heading Add Mod ?
W Lifestyle, Hobbies & Leisure
Use for: (all W* codes) popular accounts for general readership. Prefer Sections A*, K*, P*, R*, T*, etc, as appropriate, for specialist & academic works
WN Nature & the natural world: general interest
Use for: (all WN* codes) popular works only. Prefer codes from Sections P*, R*, T* etc, as appropriate for specialist & academic works
WNA Dinosaurs & the prehistoric world: general interest
See also: RBX Palaeontology
WNC Wildlife: general interest
See also: PSV* Zoology & animal sciences and its subcategories
WND The countryside, country life: general interest
WNF Farm & working animals: general interest
Use for: titles about working or service dogs. See also: TVH Animal husbandry
WNG Domestic animals & pets
WNH Zoos & wildlife parks: general interest
WNJ National parks & nature reserves: general interest
Use with: PLACE Qualifiers 1*, plus travel codes WT* for guidebooks to National (state, provincial, regional etc) parks as appropriate
WNP Trees, wildflowers & plants: general interest
See also: WMP Gardening: plants & cultivation guides
WNR Rocks, minerals & fossils: general interest
Use for: popular works on aspects of geology, including guides to gems. Use with: codes for relevant discipline to indicate subject covered. See also: RBX Palaeontology, RBG* Geology, geomorphology & the lithosphere and its subcategories, PNV Chemistry of minerals, crystals & gems
WNW The Earth: natural history: general interest
Use for: popular works on natural history of the Earth as a whole, physical features & systems as well as life on Earth, popular works on volcanoes, earthquakes etc. See also: RB* Earth sciences and its subcategories, PSAF Ecological science, the Biosphere
WNX Popular astronomy & space
Class here: constellation & star guides, non-specialist guides to astronomy & space, including space exploration. See also: PG* Astronomy, space & time and its subcategories, TTD Space science

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