Document (#20730)

Author
Hancock-Beaulieu, M.
Walker, S.
Title
¬An evaluation of automatic query expansion in an online library catalogue
Source
Journal of documentation. 48(1992) no.4, S.406-421
Year
1992
Abstract
An automatic query expansion (AQE) facility in anonline catalogue was evaluated in an operational library setting. The OKAPI experimental system had other features including: ranked output 'best match' keyword searching, automatic stemming, spelling normalisation and cross referencing as well as relevance feedback. A combination of transaction log analysis, search replays, questionnaires and interviews was used for data collection. Findings show that contrary to previous results, AQE was beneficial in a substantial number of searches. Use intentions, the effectiveness of the 'best match' search and user interaction were identified as the main factors affecting the take-up of the query expansion facility
Theme
OPAC
Retrievalalgorithmen
Semantisches Umfeld in Indexierung u. Retrieval
Object
OKAPI

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