African Studies Thesaurus
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The user tips contain the following sections:
* Descriptors and non-descriptors
* Finding a descriptor
* Country, form and genre lists
* Descriptor component elements
* Descriptor spelling and punctuation

Descriptors and non-descriptors

The African Studies Thesaurus contains 5452 descriptors and 7493 non-descriptors.

Descriptors, or preferred terms, are used to describe or index a publication. Like tags or labels in social media they are there to help you find things. While tags are free and personal, descriptors are part of a controlled vocabulary, the thesaurus, which ensures that the same tag will consistently be used to label the same thing. Descriptors can be used to search the library catalogue for all documents, irrespective of language.

Non-descriptors, or non-preferred terms, are (quasi-)synonyms, variant names or alternative spellings of descriptors. Non-descriptors direct the user to the descriptor, the preferred term for the concept in question. The use of descriptors ensures that the same term is consistently used when referring to a particular concept. For example the West African ethnic group variously known as the Fulani, Foulbe, Fulbe, Haalpular or Peul, amongst others, is always represented by the term Fulani, and the other terms by which this ethnic group is also known all lead to this term. Sometimes a descriptor embodies several related concepts. For example, the descriptor ritual objects is also used for amulets, fetishes, talismans. In the thesaurus, all these terms direct the user to the descriptor ritual objects.


Finding a descriptor

Typing a word or several letters in the search field and clicking the 'search thesaurus' button produces a list of all terms starting with or containing that word or those letters depending on which option - 'starts with' or 'contains' - has been checked. If a term is not found, the alphabetically closest terms are displayed.

Clicking on a letter in the A-Z list produces an alphabetical list of all terms beginning with that letter. In the alphabetical indexes, descriptors are in regular font, non-descriptors in italics. The list may span more than one page.

Clicking on subject categories produces a list of all subject categories, and clicking on a specific category produces a list of descriptors belonging to that category.


Country, form and genre lists

The thesaurus includes a number of broad geographical and form headings which can be used to obtain a list of descriptors per country, material type or genre.

* geographical headings, e.g. Algerian languages, Ghanaian peoples, Cameroonian polities, Kenyan political parties, can be used to generate a list of languages, peoples, polities or political parties in a particular country.

* the descriptor documents (form) groups all material types; clicking on a specific material type produces a corresponding list.
Alternatively go to the following Subject categories
022.012 PRIMARY AND SECONDARY MATERIALS
022.013 BIBLIOGRAPHICAL TOOLS, HANDBOOKS AND REFERENCE WORKS
022.014 AUDIOVISUAL, PICTORIAL AND CARTOGRAPHIC MATERIALS

* the descriptor literature (form) groups literary genres; clicking on a specific genre produces a corresponding list.
Alternatively go to the following Subject categories
019.012 ORAL LITERATURE
019.013 LITERARY GENRES

* the descriptor time periods groups all the time periods.


Descriptor component elements


Descriptor spelling and punctuation

* Spelling is British English, with American English variants as non-preferred terms
* Preferred term for African languages and ethnic groups is the name without a prefix
* Terms are generally plural, exceptions are proper names, abbreviations, acronyms, abstract concepts
* Apostrophes and hyphens are included where appropriate
* Accents are used where applicable, such as in French and Portuguese proper names



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