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.
| Notation | Category heading | Add | Mod | ? |
|---|---|---|---|---|
| 3 | Time period qualifiers DO NOT USE “3” on individual books, but select qualifiers from section 3* as appropriate |
✽ | ||
| 3M | c 1500 onwards to present day | |||
| 3MP | 20th century, c 1900 to c 1999 | |||
| 3MPB | Early 20th century c 1900 to c 1950 | |||
| 3MPBA | c 1900 to c 1909 | |||
| 3MPBF | c 1910 to c 1919 | |||
| 3MPBG | Inter-war period c 1919 to c 1939 | |||
| 3MPBL | c 1940 to c 1949 | |||
| 3MPB-AR-B | Argentina: period of the Saenz Peña Law & First democratic governments 1916–1930 | 201904 | ||
| 3MPB-ES-A | Spain: End of the Monarchy (c 1900 to c 1931) | 201701 | ||
| 3MPB-FI-A | Finland: period of Russification of 1899–1917 | 201904 | ||
| 3MPB-IT-R | Italy: Giolittian period (1900–1914) | |||
| 3MPB-JP-B | 1912 to 1926 (Japanese Taisho period) | 201910 | ||
| 3MPB-JP-D | 1926 to 1945 (Japanese pre-war Showa period) | 201910 | ||
| 3MPB-US-H | USA: The Progressive Era (c 1890 to c 1929) |
version detail
- An ellipsis indicates a category has more detailed subcategories
- Click on a category description to reveal these ‘descendant’ subcategories
- Indentation indicates the ancestors and descendants of a category
- Click on the ✽ or ? to see or hide the usage notes
- Search for categories (for example ‘celebrity’) using the search field at the top
- Searches are not case-sensitive, and search both the category headings and any notes
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- You can also search for Thema codes – these searches must be exact (eg ‘MFGV’)
- Click on a search result category to see it ‘in context’ with its ancestor and descendant categories
- A click on ‘Category heading’ or a blank search returns you to the top level of the hierarchy
- Click on the notation to copy the code to the clipboard