-
Markey, K.; Atherton, P.; Newton, C.: ¬An analysis of controlled vocabulary and free text search statements in online searches (1980)
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- Source
- Online review. 4(1980), S.225-236
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Wenzel, F.: Semantische Eingrenzung im Freitext-Retrieval auf der Basis morphologischer Segmentierungen (1980)
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- Abstract
- The basic problem in freetext retrieval is that the retrieval language is not properly adapted to that of the author. Morphological segmentation, where words with the same root are grouped together in the inverted file, is a good eliminator of noise and information loss, providing high recall but low precision
-
Tenopir, C.: Full text database retrieval performance (1985)
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- Source
- Online review. 9(1985), S.149-164
-
Dubois, C.P.R.: Free text vs. controlled vocabulary; a reassessment (1987)
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- Abstract
- Free text and controlled vocabulary searching can no longer be viewed as antagonistic techniques in information retrieval since they both display advantages and weaknesses dependent on a fairly wide range of context, with the option to use both increasingly favoured. An attempt is made to present a list of features associated with the two techniques and to suggest a methodology to assist in deciding on the optimal retrieval technique for a particular purpose. The relevance of the techniques in expert systems and full text contexts is also discussed. Finally, recommendations for further research are suggested, concentrating on survey techniques in real-life retrieval situations
- Source
- Online review. 11(1987), S.243-253
-
Schmidt, J.: Full-text searching : as seen from a non-bibliographic searcher's point of view (1989)
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- Abstract
- Examines searching capabilities and search results relating to the same full text data base made available by: a host that offers a command language designed for searching bibliographic data bases and a host that provides search facilities that have been specially designed for full text retrieval. Moreover, the CD-ROM format of an encyclopedia is compared with the equivalent on-line version of the same work, Academic American Encyclopedia. Results reveal that it is easier to search on those systems that offer searching facilities which have been specially designed for full text retrieval.
- Source
- Online Information 89. Proceedings of the 13th International Online Information Meeting, London, 12-14 December 1989
-
Meunier, J.-G.; Bertrand-Gastaldy, S.; Lebel, H.: ¬A call for enhanced representation of content as a means of improving online full-text retrieval (1987)
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- Abstract
- Given the phenomena of growth and diversification which affect both text databases and their users, it is essential to reflect on the nature of textual information and its representation within the very particular framework of interactive retrieval systems. The latter aim to correlate two types of conceptual structures, that of the user and that of the text, by way of a third structure - the interface. A typology of levels, of representation is proposed (typographical, lexical, statistical, linguistic, semiotic, and pragmatic). These representations, obtained by means of a multiplicity of strategies (intra-sentence, intratextual, intertextual) applied to different units of information and interrelated, render the interaction between diverse users and the database more flexible and more adaptable
-
Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989)
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- Abstract
- Searches conducted as part of the MEDLINE/Full-Text Research Project revealed that the full-text data bases of clinical medical journal articles (CCML (Comprehensive Core Medical Library) from BRS Information Technologies, and MEDIS from Mead Data Central) did not retrieve all the relevant citations. An analysis of the data indicated that 204 relevant citations were retrieved only by MEDLINE. A comparison of the strategies used on the full-text data bases with the text of the articles of these 204 citations revealed that 2 reasons contributed to these failure. The searcher often constructed a restrictive strategy which resulted in the loss of relevant documents; and as in other kinds of retrieval, the problems of natural language caused the loss of relevant documents.
- Date
- 9. 1.1996 10:22:31
-
Salton, G.: Another look at automatic text-retrieval systems (1986)
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- Footnote
- Bezugnahme auf: Blair, D.C.: An evaluation of retrieval effectiveness for a full-text document-retrieval system. Comm. ACM 28(1985) S.280-299. - Vgl. auch: Blair, D.C.: Full text retrieval ... Int. Class. 13(1986) S.18-23; Blair, D.C., M.E. Maron: full-text information retrieval ... Inf. Proc. Man. 26(1990) S.437-447.
-
Blair, D.C.; Maron, M.E.: ¬An evaluation of retrieval effectiveness for a full-text document-retrieval system (1985)
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- Footnote
- Vgl. auch : Salton, G.: Another look ... Comm. ACM 29(1986) S.S.648-656; Blair, D.C.: Full text retrieval ... Int. Class. 13(1986) S.18-23: Blair, D.C., M.E. Maron: Full-text information retrieval ... Inf. proc. man. 26(1990) S.437-447.
-
Ro, J.S.: ¬An evaluation of the applicability of ranking algorithms to improve the effectiveness of full-text retrieval : 1. On the effectiveness of full-text retrieval (1988)
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-
Frederick, S.C.: SIRE: full-text retrieval with augmented search (1985)
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-
Ashford, J.H.; Matkin, D.I.: Studies in the application of free text package systems for information storage and retrieval in libraries and related information centres (1982)
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-
Bernstein, L.M.; Williamson, R.E.: Testing of a natural language retrieval system for a full text knowledge base (1984)
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-
Blair, D.C.: Full text retrieval : Evaluation and implications (1986)
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- Abstract
- Recently, a detailed evaluation of a large, operational full-text document retrieval system was reported in the literature. Values of precision and recall were estimated usind traditional statistical sampling methods and blind evaluation procedures. The results of this evaluation demonstrated that the system tested was retrieving less then 20% of the relevant documents when the searchers believed it was retrieving over 75% of the relevant documents. This evaluation is described including some data not reported in the original article. Also discussed are the implications which this study has for how the subjects of documents should be represented, as well as the importance of rigorous retrieval evaluations for the furtherhance of information retrieval research
- Footnote
- Vgl.: Blair, D.C., M.E. Maron: An evaluation ... Comm. ACM 28(1985) S.280-299; Salton, G.: Another look ... Comm. ACM 29(1986) S.648-656; Blair, D.C., M.E. Maron: Full-text information retrieval ... Inf. Proc. Man. 26(1990) S.437-447.
-
Graham, T.: ¬The free language approach to online catalogues : the user (1985)
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-
Cochrane, P.A.: Subject access - free text and controlled : the case of Papua New Guinea (1985)
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- Abstract
- The online catalogue can provide the user with efficient and effective access through a variety of access points. New interests in subject heading is indicated. Keyword access and free text searching are considered alternatice methods. An investigation is suggested into the symbiotic relationship between classification and subject heading
- Source
- Online public access to library files. Conf. Proc. held at the Univ. of Bath, 3.-5.9.1984. Ed.: J. Kinsella
-
Böhle, K.; Riehm, U.: German fulltexts in working contexts : empirical findings on how end-users make use of fulltext databases (1989)
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- Source
- Online Information 89. Proceedings of the 13th International Online Information Meeting, London, 12-14 December 1989
-
Perez, E.: Text enhancement : Controlled vocabulary vs. free text (1982)
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- Abstract
- Full-text databases are becoming increasingly practical for publication and general use, since most publishers now use some form of computerized editorial and publication system. "Free text" retrieval from full-text databases is possible with many existing systems, but some information professionals are doubtful about the quality of information retrieval using this type of access. The "augmentation" or "enrichment" needed for practical operation of these systems is discussed
