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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.
Systematic or Enumerative This kind of bibliography deals with the enumeration and classification of books. It also takes care of the assembling of bibliographical entries int
Government Publications All the government publications are referred to as the government sources of information. A government publication is that which is issued at governmen
Political Psychology -This Psychology is "An application of what is identified regarding human psychology to the study of politics." This psychology is an interdisciplinary academi
Special Dictionaries Special dictionaries are grouped into four major groups. They are dictionaries dealing with: Linguistic aspects of words Special class of words
Special Subject Encyclopaedia It is rather common for the reference librarian to receive queries regarding specific subjects. The answer of such queries can be searched from t
Differentiate Micro -ethics and Macro -ethics? Micro -ethics : Deals about some typical and everyday problems which play an significant role in the field of engineering and i
Human Body Systems: It is the system of bones, related joints and cartilages of human body. Simultaneously these structures form the human skeleton. Skeleton can be explained as t
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who will be the king in 1066
Levels of Subject Authority Control Subject authority control is exercised at two levels: central and local. At the central level, a central agency (e.g. Library of Congress)
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