-
Walker, S.: ¬The Okapi online catalogue research projects (1989)
0.07
0.07212787 = product of:
0.14425574 = sum of:
0.14425574 = sum of:
0.07351384 = weight(_text_:k in 1942) [ClassicSimilarity], result of:
0.07351384 = score(doc=1942,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.39440846 = fieldWeight in 1942, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.078125 = fieldNorm(doc=1942)
0.0707419 = weight(_text_:22 in 1942) [ClassicSimilarity], result of:
0.0707419 = score(doc=1942,freq=2.0), product of:
0.1828423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052213363 = queryNorm
0.38690117 = fieldWeight in 1942, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=1942)
0.5 = coord(1/2)
- 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.
-
Khoo, C.S.G.; Wan, K.-W.: ¬A simple relevancy-ranking strategy for an interface to Boolean OPACs (2004)
0.06
0.060980063 = sum of:
0.010490555 = product of:
0.04196222 = sum of:
0.04196222 = weight(_text_:authors in 2509) [ClassicSimilarity], result of:
0.04196222 = score(doc=2509,freq=2.0), product of:
0.23803101 = queryWeight, product of:
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.052213363 = queryNorm
0.17628889 = fieldWeight in 2509, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.02734375 = fieldNorm(doc=2509)
0.25 = coord(1/4)
0.050489508 = sum of:
0.025729846 = weight(_text_:k in 2509) [ClassicSimilarity], result of:
0.025729846 = score(doc=2509,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.13804297 = fieldWeight in 2509, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.02734375 = fieldNorm(doc=2509)
0.024759663 = weight(_text_:22 in 2509) [ClassicSimilarity], result of:
0.024759663 = score(doc=2509,freq=2.0), product of:
0.1828423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052213363 = queryNorm
0.1354154 = fieldWeight in 2509, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02734375 = fieldNorm(doc=2509)
- 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
-
Online-Benutzerkataloge : Vergleich von OPACs mit Ausleihfunktionen an deutschen Universitätsbibliotheken (1994)
0.06
0.057702295 = product of:
0.11540459 = sum of:
0.11540459 = sum of:
0.058811072 = weight(_text_:k in 1242) [ClassicSimilarity], result of:
0.058811072 = score(doc=1242,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.31552678 = fieldWeight in 1242, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.0625 = fieldNorm(doc=1242)
0.05659352 = weight(_text_:22 in 1242) [ClassicSimilarity], result of:
0.05659352 = score(doc=1242,freq=2.0), product of:
0.1828423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052213363 = queryNorm
0.30952093 = fieldWeight in 1242, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=1242)
0.5 = coord(1/2)
- 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
-
Horn, M.E.: "Garbage" in, "refuse and refuse disposal" out : making the most of the subject authority file in the OPAC (2002)
0.05
0.045740776 = sum of:
0.02098111 = product of:
0.08392444 = sum of:
0.08392444 = weight(_text_:authors in 156) [ClassicSimilarity], result of:
0.08392444 = score(doc=156,freq=2.0), product of:
0.23803101 = queryWeight, product of:
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.052213363 = queryNorm
0.35257778 = fieldWeight in 156, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.0546875 = fieldNorm(doc=156)
0.25 = coord(1/4)
0.024759663 = product of:
0.049519327 = sum of:
0.049519327 = weight(_text_:22 in 156) [ClassicSimilarity], result of:
0.049519327 = score(doc=156,freq=2.0), product of:
0.1828423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052213363 = queryNorm
0.2708308 = fieldWeight in 156, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=156)
0.5 = coord(1/2)
- 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
-
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)
0.04
0.03920638 = sum of:
0.017983811 = product of:
0.071935244 = sum of:
0.071935244 = weight(_text_:authors in 2611) [ClassicSimilarity], result of:
0.071935244 = score(doc=2611,freq=2.0), product of:
0.23803101 = queryWeight, product of:
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.052213363 = queryNorm
0.30220953 = fieldWeight in 2611, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.046875 = fieldNorm(doc=2611)
0.25 = coord(1/4)
0.021222569 = product of:
0.042445138 = sum of:
0.042445138 = weight(_text_:22 in 2611) [ClassicSimilarity], result of:
0.042445138 = score(doc=2611,freq=2.0), product of:
0.1828423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052213363 = queryNorm
0.23214069 = fieldWeight in 2611, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=2611)
0.5 = coord(1/2)
- 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
-
Rädler, K.: Kataloganreicherung mit digitalen Inhaltsverzeichnissen eröffnet neue Geschäftsfelder : Erfahrungen aus der Vorarlberger Landesbibliothek (2008)
0.04
0.036063936 = product of:
0.07212787 = sum of:
0.07212787 = sum of:
0.03675692 = weight(_text_:k in 1942) [ClassicSimilarity], result of:
0.03675692 = score(doc=1942,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.19720423 = fieldWeight in 1942, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.0390625 = fieldNorm(doc=1942)
0.03537095 = weight(_text_:22 in 1942) [ClassicSimilarity], result of:
0.03537095 = score(doc=1942,freq=2.0), product of:
0.1828423 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052213363 = queryNorm
0.19345059 = fieldWeight in 1942, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=1942)
0.5 = coord(1/2)
- Date
- 22. 6.2008 17:14:24
-
Markey, K.: Users and the online catalog : subject access problems (1986)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 342) [ClassicSimilarity], result of:
0.117622145 = score(doc=342,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 342, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=342)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Markey, K.: Integrating the machine-readable LCSH into online catalogs (1988)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 356) [ClassicSimilarity], result of:
0.117622145 = score(doc=356,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 356, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=356)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Markey, K.: Subject searching experiences and needs on online catalog users : implications for library classification (1985)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 379) [ClassicSimilarity], result of:
0.117622145 = score(doc=379,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 379, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=379)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Wiest, K.: ¬Der Einsatz von Online-Benutzerkatalogen : Erfahrungsbericht über den Einsatz in der Stadtbücherei Speyer (1987)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 711) [ClassicSimilarity], result of:
0.117622145 = score(doc=711,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 711, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=711)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Markey, K.: Thus spoke the OPAC user (1983)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 785) [ClassicSimilarity], result of:
0.117622145 = score(doc=785,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 785, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=785)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Beiser, K.: CD-ROM catalogs : the state of the art (1988)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 792) [ClassicSimilarity], result of:
0.117622145 = score(doc=792,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 792, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=792)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Schröder, K.: Zur OPAC-Diskussion, ein britisches Projekt: OKAPI (1990)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 1402) [ClassicSimilarity], result of:
0.117622145 = score(doc=1402,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 1402, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=1402)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Markey, K.: Online catalog use : results of surveys and focus group interviews in several libraries (1983)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 1994) [ClassicSimilarity], result of:
0.117622145 = score(doc=1994,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 1994, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=1994)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Wilkens, K.: Nur Tricks? : Zu einigen 'Feinheiten' der differenzierten Buchanfrage (1992)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 2047) [ClassicSimilarity], result of:
0.117622145 = score(doc=2047,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 2047, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=2047)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Chu, C.-K.: ¬A HyperCard map information system (1991)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 2075) [ClassicSimilarity], result of:
0.117622145 = score(doc=2075,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 2075, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=2075)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Klemperer, K.: New dimensions for the online catalog : The Dartmouth College Library experience (1989)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 2158) [ClassicSimilarity], result of:
0.117622145 = score(doc=2158,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 2158, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=2158)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Markey, K.: Subject searching in library catalogs : Before and after the introduction of online catalogs (1984)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 2284) [ClassicSimilarity], result of:
0.117622145 = score(doc=2284,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 2284, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=2284)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Coyle, K.: MELVYL input ten years later : the changing face of our bibliographic file (1992)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 2391) [ClassicSimilarity], result of:
0.117622145 = score(doc=2391,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 2391, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=2391)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Beiser, K.; Nelson, N.M.: CD-ROM public access catalogs : an assessment (1989)
0.03
0.029405536 = product of:
0.058811072 = sum of:
0.058811072 = product of:
0.117622145 = sum of:
0.117622145 = weight(_text_:k in 2429) [ClassicSimilarity], result of:
0.117622145 = score(doc=2429,freq=2.0), product of:
0.18639012 = queryWeight, product of:
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.052213363 = queryNorm
0.63105357 = fieldWeight in 2429, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.569778 = idf(docFreq=3384, maxDocs=44218)
0.125 = fieldNorm(doc=2429)
0.5 = coord(1/2)
0.5 = coord(1/2)
