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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.
Mass Media Mass media here means communication through a number of physical transmission modes such as print, visual, audio, audio-visual and electronic forms to a general mas
Machine-readable Record Format MARC is an acronym for Machine-readable Catalogue or cataloguing. This general description is misleading, implying that MARC is a kind of cat
Multilingual Dictionaries The second type useful for translation are known as multilingual or polyglot dictionaries. They provide similar words in three or more languages
KEY WORD INDEXING MODELS Computers began to be used to aid information retrieval system in the 1950s. The first use of computers in information retrieval was the production
Evaluation of Encyclopaedias A good and useful collection of general and special encyclopaedias form the backbone for the reference work in any library. The strong collectio
VARIOUS TYPES OF ENCYCLOPAEDIAS In the previous section, we have surveyed the genesis and development of encyclopaedia as one of the most popular reference sources. Every lib
Biographical Sources A large part of the literature of reference consists of works that contain information about people, else known as the biographical sources. Their abundan
Economic and Resource Geography- We study in economic geography the locational, behavioral and organizational principles and processes related along with the spatial allocation of
why did the American cause look more helpful after the Battle of Saratoga?
EXPLAIN TRADE UNION PULL AND PUSH HYPOTHESIS
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