-
Walker, S.: ¬The Okapi online catalogue research projects (1989)
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- Date
- 16. 8.1998 11:22:08
- Footnote
- Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.424-435.
- Pages
- S.84-106
-
Online-Benutzerkataloge : Vergleich von OPACs mit Ausleihfunktionen an deutschen Universitätsbibliotheken (1994)
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- Footnote
- Rez. in: ABI-Technik 14(1994) H.3, S.269 (D. Schmidmaier); Mitteilungen VÖB 48(1995) H.1, S.65-66 (K. Niedermair); Bibliothek: Forschung u. Praxis 19(1995) H.1, S.127-128 (J. Nafzger-Glöser)
- Isbn
- 3-924659-22-2
- Pages
- 120 S
- Type
- s
-
Khoo, C.S.G.; Wan, K.-W.: ¬A simple relevancy-ranking strategy for an interface to Boolean OPACs (2004)
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- Abstract
- A relevancy-ranking algorithm for a natural language interface to Boolean online public access catalogs (OPACs) was formulated and compared with that currently used in a knowledge-based search interface called the E-Referencer, being developed by the authors. The algorithm makes use of seven weIl-known ranking criteria: breadth of match, section weighting, proximity of query words, variant word forms (stemming), document frequency, term frequency and document length. The algorithm converts a natural language query into a series of increasingly broader Boolean search statements. In a small experiment with ten subjects in which the algorithm was simulated by hand, the algorithm obtained good results with a mean overall precision of 0.42 and mean average precision of 0.62, representing a 27 percent improvement in precision and 41 percent improvement in average precision compared to the E-Referencer. The usefulness of each step in the algorithm was analyzed and suggestions are made for improving the algorithm.
- Source
- Electronic library. 22(2004) no.2, S.112-120
-
Horn, M.E.: "Garbage" in, "refuse and refuse disposal" out : making the most of the subject authority file in the OPAC (2002)
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- Abstract
- Subject access in the OPAC, as discussed in this article, is predicated on two different kinds of searching: subject (authority, alphabetic, or controlled vocabulary searching) or keyword (uncontrolled, free text, natural language vocabulary). The literature has focused on demonstrating that both approaches are needed, but very few authors address the need to integrate keyword into authority searching. The article discusses this difference and compares, with a query on the term garbage, search results in two online catalogs, one that performs keyword searches through the authority file and one where only bibliographic records are included in keyword searches.
- Date
- 10. 9.2000 17:38:22
- Source
- Library resources and technical services. 46(2002) no.3, S.111-
-
Alonso Lifante, M.P.; Molero Madrid, F.J.: Enhancing OPAC records : evaluating and fitting within cataloguing standards a new proposal of description parameters for historical astronomical resources (2015)
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- Abstract
- Enhancing content description of specialized resources, particularly astronomical resources, is a matter that is still unresolved in library and information science. In this paper, the authors outline deficiencies in some fields and elements of cataloging standards for description of historical astronomical resources, mainly star atlases and catalogs. Furthermore, they review their recent proposal of astronomical parameters for a better description and propose an approach for accommodating these parameters in the current criteria of MARC 21, the International Standard Bibliographic Description, and Resource Description and Access. Fourteen new parameters are considered, and recommendations are provided to standards developers for the addition of elements to accommodate attributes of celestial cartographic resources. This would improve bibliographic records for such resources in astronomical libraries' OPACs, which will have a beneficial effect on information retrieval.
- Date
- 10. 9.2000 17:38:22
- Source
- Library resources and technical services. 59(2015) no.4, S.140-161
-
Walker, S.: Improving subject access painlessly : recent work on the Okapi online catalogue projects (1988)
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- Source
- Program. 22(1988), S.21-31
-
Markey, K.: Users and the online catalog : subject access problems (1986)
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- Pages
- S.35-69
-
Markey, K.: Integrating the machine-readable LCSH into online catalogs (1988)
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- Source
- Information technology and libraries. 7(1988), S.299-312
-
Markey, K.: Subject searching experiences and needs on online catalog users : implications for library classification (1985)
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- Source
- Library resources and technical services. 25(1985), S.34-51
-
Wiest, K.: ¬Der Einsatz von Online-Benutzerkatalogen : Erfahrungsbericht über den Einsatz in der Stadtbücherei Speyer (1987)
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- Source
- Bibliotheksdienst. 21(1987), S.1199-1209
-
Markey, K.: Thus spoke the OPAC user (1983)
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- Source
- Information technology and libraries. 2(1983), S.381-387
-
Beiser, K.: CD-ROM catalogs : the state of the art (1988)
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- Source
- Wilson library bulletin. 1988, Nov., S.25-34
-
Schröder, K.: Zur OPAC-Diskussion, ein britisches Projekt: OKAPI (1990)
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- Bibliotheksdienst. 24(1990), S.1504-1512
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Wilkens, K.: Nur Tricks? : Zu einigen 'Feinheiten' der differenzierten Buchanfrage (1992)
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Chu, C.-K.: ¬A HyperCard map information system (1991)
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Klemperer, K.: New dimensions for the online catalog : The Dartmouth College Library experience (1989)
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Coyle, K.: MELVYL input ten years later : the changing face of our bibliographic file (1992)
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Beiser, K.; Nelson, N.M.: CD-ROM public access catalogs : an assessment (1989)
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Hegarty, K.: Library public access catalogs : on-line vs. CD-ROM (1987)
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Markey, K.: Online assistance in online catalogs (1990)
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