Thema Subject Categories 1.4

Previous versions of Thema are still available 1.3 1.2.

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Notation Category heading Add Mod ?
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
WN Nature and the natural world: general interest
Use all WN* codes for: popular works only.
Prefer: codes from Sections P*, R*, T* etc, as appropriate for specialist and academic works
WNX Popular astronomy and space
Class here: constellation and star guides, non-specialist guides to astronomy and space, including space exploration.
See also: PG* Astronomy, space and time and its subcategories, TTD Space science

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