Thema Subject Categories 1.4

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.

See the search hints below.

Notation Category heading Add Mod ?
R Earth Sciences, Geography, Environment, Planning
Use all R* codes for: academic, technical, specialist and general adult titles. DO NOT USE: code ‘R’ itself, but select specific categories from section R*. Use all R* codes with: other subject categories and qualifiers where appropriate, in particular PLACE 1* Qualifiers
RG Geography
Use all RG* codes with: PLACE 1* Qualifiers as appropriate
RGB Physical geography and topography
See also: RBG Geology, geomorphology and the lithosphere
RGBA Arid zones, deserts
RGBC Plains and grasslands
RGBD Tundra
RGBF Wetlands, swamps, fens
RGBG Rivers and lakes 1.3
RGBL Forests and woodland
RGBP Coastlines
Class here: deltas, estuaries, fjords, beaches, spits, shorelines, cliffs, coastal erosion, etc.
See also: RBK* Hydrology and the hydrosphere and its subcategories
RGBR Coral reefs
RGBS Mountains
RGBU Glaciers and ice caps 1.3

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