Document (#2104)

Author
Fidel, R.
Title
Thesaurus requirements for an intermediary expert system
Source
Classification research for knowledge representation and organization. Proc. 5th Int. Study Conf. on Classification Research, Toronto, Canada, 24.-28.6.1991. Ed. by N.J. Williamson u. M. Hudon
Imprint
Amsterdam : Elsevier
Year
1992
Pages
S.209-213
Series
FID; 698
Abstract
Direct observations and analysis of searching behaviour of professional online searchers shed light on thesaurus requirements for an intermediary expert system - a system that mediates between online databases and end users. Examination of searchers' decisions about the selection of search keys, and of the knowledge about terminological and subject properties that are employed, illuminated the requirements for a thesaurus that will facilitate the selection of search keys. Expert knowledge is needed when: a term occurs very frequently in the database; it has many synonyms; it is ambiguous; it is vague; or its meaning is context dependent. To diagnose such terms and to give advice, a thesaurus would be used together with a variety of text sources such as databases' thesauri, machine-readable dictionaries and glossaries and the databases' text. The thesaurus would be a knowledge structure that indicates frequency data, hedges, and a classificatory structure; both intellectual and automated procedures would be used to create it. Such a knowledge structure in place would require a new approach to text analysis and to the construction of controlled vocabularies

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