Abstract:
The choice of candidate terms from different sources of information such as dictionary, encyclopaedia, textbook, indexing and abstracting periodicals, classification schemes, are discussed. The availability of
such sources in the field of library and information science and their helpfulness in the choice of candidate terms and in fixing the interrelationship between them, have been discussed. It is observed that the reference sources such as dictionary and encyclopaedia, textbooks, and classifica-
tion schemes provide terms which are stabilised in the field, whereas the
indexing and abstracting services provide terms of recent origin and current usage. Thus a thesaurus for information retrieval should judiciously choose candidate terms from a variety of sources.
