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Definition
There are a number of definitions of 'thesaurus' provided by different experts and organisations. The most comprehensive one has been provided by the International Standards Organisation (ISO) as the basis of structure and functions of a thesaurus. In terms of functions, it states "a thesaurus is a terminological control device used in translating from the natural language of documents, indexers or users into a more constrained 'system language' (documentation language, information language)". In terms of structure, the Standard says, "a thesaurus is a controlled and dynamic vocabulary of semantically and generically related terms which covers a specific domain of knowledge".
In short, a thesaurus may be defined as a compilation of descriptors for use in an information retrieval system arranged in an alphabetical order and manifesting the various types of relationships existing between the descriptors. An information retrieval thesaurus is a kind of semantic networking of concepts.
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KINDS OF ENTRIES We observed that in a Library Catalogue there is need for several entries. A library catalogue is a time saving device also. It helps us realize the objectiv
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Functions of a Thesaurus The major functions of a thesaurus include the following : a) it provides a standard vocabulary for a given subject field by exercising control o
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ENTRY FORMAT A library catalogue card is of a standard size 12.5cm * 7.5cm.It may be a white blank card or a card with lines printed on it. See the illustrations given below
The story of state formation in North America is similar. One difference is that the struggle for territory after the beginnings of European settlement was initially driven exogeno
Standard Vocabulary As LCSH is the official list of Library of Congress, not only does it give an authority to the standard vocabulary of LC, but also maintains its utility,
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