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Cousins, S.A.: In their own words : an examination of catalogue subject queries (1992)
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- Abstract
- As part of a recent project, a large set of catalogue user's subject queries was collected by interview. Describes the libraries and the data collection procedures. The query set obtained is divided into general categories of subject search. Discusses the category of query and the prblem which face the user when searching. Offers solutions. The most important issues relate to the users' expression of need, access to specific types of materials, interdisciplinary subjects and inappropriate queries. Considers the implications for OPAC design
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Cousins, S.A.: In their own words : an examination of catalogue users' subject queries (1992)
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- Abstract
- As part of a recent research project a large set of catalogue users' subject queries was collected by interview. The libraries and the data collection procedures are briefly described. The query set obtained has been divided into several general categories which illustrate the range of of types of subject search being performed. Each category of query is discussed, with a consideration of the problem which face the user in carrying out each type of search. Possible solutions to some of these problems are considered. The most important issue is the variation in specifity of the queries, whilst other issues relate to the users' expression of need, access to specific types of materials, interdisciplinary subjects, and inappropriate queries. These issues are summarised and the implications for OPAC design are discussed
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Cousins, S.A.: Duplicate detection and record consolidation in large bibliographic databases : the COPAC database experience (1998)
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- Abstract
- COPAC (CURL OPAC) is a union catalogue, based on records supplied by members of the Consortium of University Libraries (CURL), giving access to the online catalogue records of some of the largest academic research libraries in the UK and Ireland. Like all union catalogues, COPAC is supplied with multiple copies of records representing the same document in the contributing library catalogues. To reduce the level of duplication visible to the COPAC user, duplicate detection and record consolidation procedures have been developed. These result in the production of a single record for each document, representing the holdings of several libraries. Discusses the ways in which both the duplicate detection and record consolidation procedures are carried out, and problem areas encountered. Describes the general structure of these procedures, providing a model of the duplicate record handling mechanisms used in COPAC
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Cousins, S.A.: Enhancing subject access to OPACs : controlled vocabulary vs. natural language (1992)
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- Abstract
- Experimental evidence suggests that enhancing the subject content of OPAC records can improve retrieval performance. This is based on the use of natural language index terms derived from the table of contents and back-of-the-book index of documents. The research reported here investigates the alternative approach of translating these natural language terms into controlled vocabulary. Subject queries were collected by interview at the catalogue, and indexing of the queries demonstrated the impressive ability of PRECIS, and to a lesser extent LCSH, to represent users' information needs. DDC performed poorly in this respect. The assumption was made that an index language adequately specific to represent users' queries should be adequate to represent document contents. Searches were carried out on three test databases, and both natural language and PRECIS enhancement of MARC records increased the number of relevant documents found, with PRECIS showing the better performance. However, with weak stemming the advantage of PRECIS was lost. Consideration must also be given to the potential advantages of controlled vocabulary, over and above basic retrieval performance measures
