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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.
How to Use a Thesaurus The final process of indexing involves translating the relevant subject concepts of the document into the indexing language or the descriptor language
Three Levels of Description The three levels of description are detailed thus: First Level of Description: For the first level of description the following elements are
Controlled Indexing Language In the foregoing paragraphs we have discussed the concept of an indexing language as also, the categories into which it falls. In the process, we
"They went to one of the many restaurants lining the 500-foot-wide avenue leading south from the imperial city . After some discussion about what sort of food they wanted, they
Social Sciences Citation Index a) Social Sciences Citation Index (SSCI). Philadelphia: ISI 1973- It provides access to over 1700 leading Social Sciences journals in various d
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SUBJECT HEADINGS LIST Subject heading has been defined as a word or group of words indicating a subject under which all materials dealing with same theme is entered in a c
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what are the characteristics of humanities?
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