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 |
✽ | ||
| 3K | CE period up to c 1500 | |||
| 3KL | c 1000 CE to c 1500 | |||
| 3KLY | 15th century, c 1400 to c 1499 | |||
| 3KLY-JP-M | 1392 to 1573 (Japanese Muromachi period) | 201910 |
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
- You don’t need to use complete words (eg ‘celeb’)
- 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