-
Bates, M.J.: How to use controlled vocabularies more effectively in online searching (1989)
0.12
0.117490746 = product of:
0.23498149 = sum of:
0.041327372 = weight(_text_:retrieval in 2883) [ClassicSimilarity], result of:
0.041327372 = score(doc=2883,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.33085006 = fieldWeight in 2883, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=2883)
0.05186718 = weight(_text_:use in 2883) [ClassicSimilarity], result of:
0.05186718 = score(doc=2883,freq=6.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.4101866 = fieldWeight in 2883, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=2883)
0.025901893 = weight(_text_:of in 2883) [ClassicSimilarity], result of:
0.025901893 = score(doc=2883,freq=22.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.40111488 = fieldWeight in 2883, product of:
4.690416 = tf(freq=22.0), with freq of:
22.0 = termFreq=22.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=2883)
0.11588505 = sum of:
0.01544937 = weight(_text_:on in 2883) [ClassicSimilarity], result of:
0.01544937 = score(doc=2883,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.17010231 = fieldWeight in 2883, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=2883)
0.10043568 = weight(_text_:line in 2883) [ClassicSimilarity], result of:
0.10043568 = score(doc=2883,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.4337094 = fieldWeight in 2883, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0546875 = fieldNorm(doc=2883)
0.5 = coord(4/8)
- Abstract
- Optimal retrieval in on-line searching can be achieved through combined use of both natural language and controlled vocabularies. However, there is a large variety of types of controlled vocabulary in data bases and often more than one in a single data base. Optimal use of these vocabularies requires understanding what types of languages are involved, and taking advantage of the particular mix of vocabularies in a given data base. Examples 4 major types of indexing and classification used in data bases and puts these 4 in the context of 3 other approaches to subject access. Discusses how to evaluate a new data base for various forms of subject access.
- Source
- Online '88. Proceedings of the Online Inc., Conference, New York, 11-12 October 1988
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Bates, M.J.: How to use controlled vocabularies more effectively in online searching (1989)
0.12
0.116888046 = product of:
0.23377609 = sum of:
0.041327372 = weight(_text_:retrieval in 207) [ClassicSimilarity], result of:
0.041327372 = score(doc=207,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.33085006 = fieldWeight in 207, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=207)
0.05186718 = weight(_text_:use in 207) [ClassicSimilarity], result of:
0.05186718 = score(doc=207,freq=6.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.4101866 = fieldWeight in 207, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=207)
0.024696484 = weight(_text_:of in 207) [ClassicSimilarity], result of:
0.024696484 = score(doc=207,freq=20.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.38244802 = fieldWeight in 207, product of:
4.472136 = tf(freq=20.0), with freq of:
20.0 = termFreq=20.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=207)
0.11588505 = sum of:
0.01544937 = weight(_text_:on in 207) [ClassicSimilarity], result of:
0.01544937 = score(doc=207,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.17010231 = fieldWeight in 207, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=207)
0.10043568 = weight(_text_:line in 207) [ClassicSimilarity], result of:
0.10043568 = score(doc=207,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.4337094 = fieldWeight in 207, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0546875 = fieldNorm(doc=207)
0.5 = coord(4/8)
- Abstract
- Optimal retrieval in on-line searching can be achieved through combined use of both natural language and controlled vocabularies. However, there is a large variety of types of controlled vocabulary in data bases and often more than one in a single data base. Optimal use of these vocabularies requires understanding what types of languages are involved, and taking advantage of the particular mix of vocabularies in a given data base. Examples 4 major types of indexing and classification used in data bases and puts these 4 in the context of 3 other approaches to subject access. Discusses how to evaluate a new data base for various forms of subject access.
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Pietris, M.K.D.: Characteristics of LC Subject Headings that should be taken into account when designing on-line catalogues (1987)
0.11
0.11468822 = product of:
0.30583525 = sum of:
0.058445733 = weight(_text_:retrieval in 2902) [ClassicSimilarity], result of:
0.058445733 = score(doc=2902,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.46789268 = fieldWeight in 2902, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.109375 = fieldNorm(doc=2902)
0.015619429 = weight(_text_:of in 2902) [ClassicSimilarity], result of:
0.015619429 = score(doc=2902,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.24188137 = fieldWeight in 2902, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.109375 = fieldNorm(doc=2902)
0.2317701 = sum of:
0.03089874 = weight(_text_:on in 2902) [ClassicSimilarity], result of:
0.03089874 = score(doc=2902,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.34020463 = fieldWeight in 2902, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.109375 = fieldNorm(doc=2902)
0.20087136 = weight(_text_:line in 2902) [ClassicSimilarity], result of:
0.20087136 = score(doc=2902,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.8674188 = fieldWeight in 2902, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.109375 = fieldNorm(doc=2902)
0.375 = coord(3/8)
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Lambert, N.: Of thesauri and computers : reflections on the need for thesauri (1995)
0.10
0.10349586 = product of:
0.20699172 = sum of:
0.033397563 = weight(_text_:retrieval in 3734) [ClassicSimilarity], result of:
0.033397563 = score(doc=3734,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.26736724 = fieldWeight in 3734, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=3734)
0.0154592255 = weight(_text_:of in 3734) [ClassicSimilarity], result of:
0.0154592255 = score(doc=3734,freq=6.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.23940048 = fieldWeight in 3734, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=3734)
0.012484977 = product of:
0.024969954 = sum of:
0.024969954 = weight(_text_:on in 3734) [ClassicSimilarity], result of:
0.024969954 = score(doc=3734,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.27492687 = fieldWeight in 3734, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0625 = fieldNorm(doc=3734)
0.5 = coord(1/2)
0.14564995 = sum of:
0.10089115 = weight(_text_:computers in 3734) [ClassicSimilarity], result of:
0.10089115 = score(doc=3734,freq=2.0), product of:
0.21710795 = queryWeight, product of:
5.257537 = idf(docFreq=625, maxDocs=44218)
0.041294612 = queryNorm
0.464705 = fieldWeight in 3734, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.257537 = idf(docFreq=625, maxDocs=44218)
0.0625 = fieldNorm(doc=3734)
0.0447588 = weight(_text_:22 in 3734) [ClassicSimilarity], result of:
0.0447588 = score(doc=3734,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.30952093 = fieldWeight in 3734, 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=3734)
0.5 = coord(4/8)
- Abstract
- Most indexed databases now include their thesauri and/or coding in their bibliographic files, searchable at the databases' online connect rates. Assesses the searchability of these on the different hosts. Thesauri and classifications are also available as diskette or CD-ROM products. Describes a number of these, highlighting the diskette thesaurus from IFI/Plenum Data for its flexible databases, the CLAIMS Uniterm and Comprehensive indexes to US chemical patents
- Source
- Searcher. 3(1995) no.8, S.18-22
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Boeckx, T.: Onderwerpontsluiting in de on-line publiekscatalogus (1986)
0.09
0.08983567 = product of:
0.3593427 = sum of:
0.09446257 = weight(_text_:retrieval in 145) [ClassicSimilarity], result of:
0.09446257 = score(doc=145,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.75622874 = fieldWeight in 145, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.125 = fieldNorm(doc=145)
0.26488012 = sum of:
0.035312846 = weight(_text_:on in 145) [ClassicSimilarity], result of:
0.035312846 = score(doc=145,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.3888053 = fieldWeight in 145, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.125 = fieldNorm(doc=145)
0.22956727 = weight(_text_:line in 145) [ClassicSimilarity], result of:
0.22956727 = score(doc=145,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.9913358 = fieldWeight in 145, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.125 = fieldNorm(doc=145)
0.25 = coord(2/8)
- Theme
- Verbale Doksprachen im Online-Retrieval
Klassifikationssysteme im Online-Retrieval
-
Keen, E.M.: Aspects of computer-based indexing languages (1991)
0.08
0.07809315 = product of:
0.1561863 = sum of:
0.047231287 = weight(_text_:retrieval in 5072) [ClassicSimilarity], result of:
0.047231287 = score(doc=5072,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.37811437 = fieldWeight in 5072, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=5072)
0.019957775 = weight(_text_:of in 5072) [ClassicSimilarity], result of:
0.019957775 = score(doc=5072,freq=10.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.3090647 = fieldWeight in 5072, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=5072)
0.017656423 = product of:
0.035312846 = sum of:
0.035312846 = weight(_text_:on in 5072) [ClassicSimilarity], result of:
0.035312846 = score(doc=5072,freq=8.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.3888053 = fieldWeight in 5072, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0625 = fieldNorm(doc=5072)
0.5 = coord(1/2)
0.071340814 = product of:
0.14268163 = sum of:
0.14268163 = weight(_text_:computers in 5072) [ClassicSimilarity], result of:
0.14268163 = score(doc=5072,freq=4.0), product of:
0.21710795 = queryWeight, product of:
5.257537 = idf(docFreq=625, maxDocs=44218)
0.041294612 = queryNorm
0.6571921 = fieldWeight in 5072, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.257537 = idf(docFreq=625, maxDocs=44218)
0.0625 = fieldNorm(doc=5072)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Comments on the relative rarity of research articles on theoretical aspects of subject indexing in computerised retrieval systems and the predominance of articles on software packages and hardware. Concludes that controlled indexing still has a future but points to major differences from the past
- Source
- Computers in libraries international 91. Proceedings of the 5th Annual Conference on Computers in Libraries, London, February 1991
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Milstead, J.L.: Thesauri in a full-text world (1998)
0.06
0.060845025 = product of:
0.09735204 = sum of:
0.020873476 = weight(_text_:retrieval in 2337) [ClassicSimilarity], result of:
0.020873476 = score(doc=2337,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.16710453 = fieldWeight in 2337, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.037047986 = weight(_text_:use in 2337) [ClassicSimilarity], result of:
0.037047986 = score(doc=2337,freq=6.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.29299045 = fieldWeight in 2337, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.017640345 = weight(_text_:of in 2337) [ClassicSimilarity], result of:
0.017640345 = score(doc=2337,freq=20.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.27317715 = fieldWeight in 2337, product of:
4.472136 = tf(freq=20.0), with freq of:
20.0 = termFreq=20.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.007803111 = product of:
0.015606222 = sum of:
0.015606222 = weight(_text_:on in 2337) [ClassicSimilarity], result of:
0.015606222 = score(doc=2337,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.1718293 = fieldWeight in 2337, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.5 = coord(1/2)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 2337) [ClassicSimilarity], result of:
0.02797425 = score(doc=2337,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 2337, 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=2337)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- Despite early claims to the contemporary, thesauri continue to find use as access tools for information in the full-text environment. Their mode of use is changing, but this change actually represents an expansion rather than a contrdiction of their utility. Thesauri and similar vocabulary tools can complement full-text access by aiding users in focusing their searches, by supplementing the linguistic analysis of the text search engine, and even by serving as one of the tools used by the linguistic engine for its analysis. While human indexing contunues to be used for many databases, the trend is to increase the use of machine aids for this purpose. All machine-aided indexing (MAI) systems rely on thesauri as the basis for term selection. In the 21st century, the balance of effort between human and machine will change at both input and output, but thesauri will continue to play an important role for the foreseeable future
- Date
- 22. 9.1997 19:16:05
- Imprint
- Urbana-Champaign, IL : Illinois University at Urbana-Champaign, Graduate School of Library and Information Science
- Source
- Visualizing subject access for 21st century information resources: Papers presented at the 1997 Clinic on Library Applications of Data Processing, 2-4 Mar 1997, Graduate School of Library and Information Science, University of Illinois at Urbana-Champaign. Ed.: P.A. Cochrane et al
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Walsh, J.: ¬The use of Library of Congress Subject Headings in digital collections (2011)
0.06
0.0605046 = product of:
0.1210092 = sum of:
0.05009634 = weight(_text_:retrieval in 4549) [ClassicSimilarity], result of:
0.05009634 = score(doc=4549,freq=18.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.40105084 = fieldWeight in 4549, product of:
4.2426405 = tf(freq=18.0), with freq of:
18.0 = termFreq=18.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03125 = fieldNorm(doc=4549)
0.04191501 = weight(_text_:use in 4549) [ClassicSimilarity], result of:
0.04191501 = score(doc=4549,freq=12.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.33148083 = fieldWeight in 4549, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.03125 = fieldNorm(doc=4549)
0.022755362 = weight(_text_:of in 4549) [ClassicSimilarity], result of:
0.022755362 = score(doc=4549,freq=52.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.35238793 = fieldWeight in 4549, product of:
7.2111025 = tf(freq=52.0), with freq of:
52.0 = termFreq=52.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.03125 = fieldNorm(doc=4549)
0.0062424885 = product of:
0.012484977 = sum of:
0.012484977 = weight(_text_:on in 4549) [ClassicSimilarity], result of:
0.012484977 = score(doc=4549,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.13746344 = fieldWeight in 4549, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.03125 = fieldNorm(doc=4549)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Purpose - This paper attempts to explain the wide dissemination of Library of Congress Subject Headings (LCSH) within digital libraries and presents some of the advantages and disadvantages of using this controlled vocabulary in digital collections. The paper also presents other classifications used in digital collections for subject access and explores ways of improving search functionality in digital collections that employ LCSH. Design/methodology/approach - Unlike traditional libraries that use Library of Congress Classification for organization and retrieval, digital libraries use metadata forms for organization and retrieval. The collections exist in cyberspace of the internet which is known for containing the universe of knowledge. The use of LCSH for information retrieval has been widely criticized for its difficulty of use and its information retrieval effectiveness in online environments. The Library of Congress (LOC) has claimed the headings were not based on comprehensive principles nor ever intended to cover the universe of knowledge. Despite these claims and criticisms, LCSH is the most popular choice for subject access in digital libraries. Findings - The number of digital collections increases every year and LCSH is still the most popular choice of controlled vocabulary for subject access. Of the numerous criticisms, difficulties of use and user unfamiliarity are the greatest disadvantages of using LCSH for subject access. Average users only have a vague notion of what they are looking for when initializing a search. More work is required in automated generation of subject headings and increased usage of LCSH in faceted search retrieval systems. This will provide users with better access to the LCSH used in the back end of information retrieval. Originality/value - The Greek researchers who developed the Dissertation DSPace system believe this type of module will eventually replace the traditional keyword-based indexing back ends employed by many information retrieval modules within current digital library systems. The system offers the type of access and interactivity that will acquaint users with how LCSH looks and is used. Faceted search and automated pattern matching using an ontology based on LCSH have the best promise of overcoming the disadvantages that have always plagued the LOC-controlled vocabulary. These retrieval techniques give LCSH an opportunity to finally achieve the optimal precision and recall it has so far failed to deliver.
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Aluri, R.D.; Kemp, A.; Boll, J.J.: Subject analysis in online catalogs (1991)
0.06
0.05558299 = product of:
0.22233196 = sum of:
0.058445733 = weight(_text_:retrieval in 863) [ClassicSimilarity], result of:
0.058445733 = score(doc=863,freq=8.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.46789268 = fieldWeight in 863, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=863)
0.16388622 = sum of:
0.02184871 = weight(_text_:on in 863) [ClassicSimilarity], result of:
0.02184871 = score(doc=863,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.24056101 = fieldWeight in 863, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=863)
0.14203751 = weight(_text_:line in 863) [ClassicSimilarity], result of:
0.14203751 = score(doc=863,freq=4.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.6133578 = fieldWeight in 863, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0546875 = fieldNorm(doc=863)
0.25 = coord(2/8)
- LCSH
- Catalogs, On / line / Subject access
Information retrieval
- Subject
- Catalogs, On / line / Subject access
Information retrieval
- Theme
- Klassifikationssysteme im Online-Retrieval
Verbale Doksprachen im Online-Retrieval
-
Julien, C.-A.; Tirilly, P.; Leide, J.E.; Guastavino, C.: Using the LCSH hierarchy to browse a collection (2012)
0.05
0.05432661 = product of:
0.14487095 = sum of:
0.04174695 = weight(_text_:retrieval in 834) [ClassicSimilarity], result of:
0.04174695 = score(doc=834,freq=8.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.33420905 = fieldWeight in 834, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=834)
0.015778005 = weight(_text_:of in 834) [ClassicSimilarity], result of:
0.015778005 = score(doc=834,freq=16.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.24433708 = fieldWeight in 834, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=834)
0.087345995 = sum of:
0.015606222 = weight(_text_:on in 834) [ClassicSimilarity], result of:
0.015606222 = score(doc=834,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.1718293 = fieldWeight in 834, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=834)
0.07173977 = weight(_text_:line in 834) [ClassicSimilarity], result of:
0.07173977 = score(doc=834,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.30979243 = fieldWeight in 834, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0390625 = fieldNorm(doc=834)
0.375 = coord(3/8)
- Abstract
- The Library of Congress Subject Headings (LCSH) is a subject structure used to index large collections throughout the world. Browsing a collection through LCSH is difficult using current on-line tools in part because they are inadequately integrated with information collections. Users of these LCSH browsing tools are expected to find a promising LCSH string before using it to search for the information itself; many users do not have the patience for such a two-step process. This article proposes a method to fully integrate a specific collection in its subset of the LCSH hierarchy in order to facilitate LCSH browsing as well as information retrieval. Techniques are described to match LCSH strings assigned to the collection with an established string from the authority records, and build their specific LCSH hierarchy. The resulting subset of LCSH structure is described in terms of its size and broader/narrower term statistics, and implications for browsing and information retrieval are discussed. The results of this research have implications for institutions wishing to further capitalize on existing LCSH organization investments for the purpose of subject browsing and information retrieval.
- Source
- Categories, contexts and relations in knowledge organization: Proceedings of the Twelfth International ISKO Conference 6-9 August 2012, Mysore, India. Eds.: Neelameghan, A. u. K.S. Raghavan
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Cousins, S.A.: Enhancing subject access to OPACs : controlled vocabulary vs. natural language (1992)
0.05
0.051275875 = product of:
0.10255175 = sum of:
0.04338471 = weight(_text_:retrieval in 2230) [ClassicSimilarity], result of:
0.04338471 = score(doc=2230,freq=6.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.34732026 = fieldWeight in 2230, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=2230)
0.025667597 = weight(_text_:use in 2230) [ClassicSimilarity], result of:
0.025667597 = score(doc=2230,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.20298971 = fieldWeight in 2230, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.046875 = fieldNorm(doc=2230)
0.024135707 = weight(_text_:of in 2230) [ClassicSimilarity], result of:
0.024135707 = score(doc=2230,freq=26.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.37376386 = fieldWeight in 2230, product of:
5.0990195 = tf(freq=26.0), with freq of:
26.0 = termFreq=26.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=2230)
0.009363732 = product of:
0.018727465 = sum of:
0.018727465 = weight(_text_:on in 2230) [ClassicSimilarity], result of:
0.018727465 = score(doc=2230,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.20619515 = fieldWeight in 2230, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.046875 = fieldNorm(doc=2230)
0.5 = coord(1/2)
0.5 = coord(4/8)
- 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
- Source
- Journal of documentation. 48(1992) no.3, S.291-309
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Losee, R.M.: Improving collection browsing : small world networking and Gray code ordering (2017)
0.05
0.049323633 = product of:
0.13152969 = sum of:
0.029519552 = weight(_text_:retrieval in 5148) [ClassicSimilarity], result of:
0.029519552 = score(doc=5148,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23632148 = fieldWeight in 5148, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=5148)
0.011156735 = weight(_text_:of in 5148) [ClassicSimilarity], result of:
0.011156735 = score(doc=5148,freq=8.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.17277241 = fieldWeight in 5148, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=5148)
0.09085341 = sum of:
0.01911364 = weight(_text_:on in 5148) [ClassicSimilarity], result of:
0.01911364 = score(doc=5148,freq=6.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.21044704 = fieldWeight in 5148, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=5148)
0.07173977 = weight(_text_:line in 5148) [ClassicSimilarity], result of:
0.07173977 = score(doc=5148,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.30979243 = fieldWeight in 5148, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0390625 = fieldNorm(doc=5148)
0.375 = coord(3/8)
- Abstract
- Documents in digital and paper libraries may be arranged, based on their topics, in order to facilitate browsing. It may seem intuitively obvious that ordering documents by their subject should improve browsing performance; the results presented in this article suggest that ordering library materials by their Gray code values and through using links consistent with the small world model of document relationships is consistent with improving browsing performance. Below, library circulation data, including ordering with Library of Congress Classification numbers and Library of Congress Subject Headings, are used to provide information useful in generating user-centered document arrangements, as well as user-independent arrangements. Documents may be linearly arranged so they can be placed in a line by topic, such as on a library shelf, or in a list on a computer display. Crossover links, jumps between a document and another document to which it is not adjacent, can be used in library databases to allow additional paths that one might take when browsing. The improvement that is obtained with different combinations of document orderings and different crossovers is examined and applications suggested.
- Theme
- Klassifikationssysteme im Online-Retrieval
Verbale Doksprachen im Online-Retrieval
-
Connell, T.H.: Use of the LCSH system : realities (1996)
0.05
0.049023453 = product of:
0.09804691 = sum of:
0.029222867 = weight(_text_:retrieval in 6941) [ClassicSimilarity], result of:
0.029222867 = score(doc=6941,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23394634 = fieldWeight in 6941, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=6941)
0.029945528 = weight(_text_:use in 6941) [ClassicSimilarity], result of:
0.029945528 = score(doc=6941,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.23682132 = fieldWeight in 6941, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=6941)
0.02342914 = weight(_text_:of in 6941) [ClassicSimilarity], result of:
0.02342914 = score(doc=6941,freq=18.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.36282203 = fieldWeight in 6941, product of:
4.2426405 = tf(freq=18.0), with freq of:
18.0 = termFreq=18.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=6941)
0.01544937 = product of:
0.03089874 = sum of:
0.03089874 = weight(_text_:on in 6941) [ClassicSimilarity], result of:
0.03089874 = score(doc=6941,freq=8.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.34020463 = fieldWeight in 6941, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=6941)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Explores the question of whether academic libraries keep up with the changes in the LCSH system. Analysis of the handling of 15 subject headings in 50 academic library catalogues available via the Internet found that libraries are not consistently maintaining subject authority control, or making syndetic references and scope notes in their catalogues. Discusses the results from the perspective of the libraries' performance, performance on the headings overall, performance on references, performance on the type of change made to the headings,a nd performance within 3 widely used onlien catalogue systems (DRA, INNOPAC and NOTIS). Discusses the implications of the findings in relationship to expressions of dissatisfaction with the effectiveness of subject cataloguing expressed by discussion groups on the Internet
- Theme
- Verbale Doksprachen im Online-Retrieval
-
O'Neill, E.T.; Chan, L.M.: FAST - a new approach to controlled subject access (2008)
0.05
0.04593989 = product of:
0.09187978 = sum of:
0.025048172 = weight(_text_:retrieval in 2181) [ClassicSimilarity], result of:
0.025048172 = score(doc=2181,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.20052543 = fieldWeight in 2181, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=2181)
0.036299463 = weight(_text_:use in 2181) [ClassicSimilarity], result of:
0.036299463 = score(doc=2181,freq=4.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.2870708 = fieldWeight in 2181, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.046875 = fieldNorm(doc=2181)
0.021168415 = weight(_text_:of in 2181) [ClassicSimilarity], result of:
0.021168415 = score(doc=2181,freq=20.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.32781258 = fieldWeight in 2181, product of:
4.472136 = tf(freq=20.0), with freq of:
20.0 = termFreq=20.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=2181)
0.009363732 = product of:
0.018727465 = sum of:
0.018727465 = weight(_text_:on in 2181) [ClassicSimilarity], result of:
0.018727465 = score(doc=2181,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.20619515 = fieldWeight in 2181, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.046875 = fieldNorm(doc=2181)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Recent trends, driven to a large extent by the rapid proliferation of digital resources, are forcing changes in bibliographic control to make it easier to use, understand, and apply subject data. Subject headings are no exception. The enormous volume and rapid growth of digital libraries and repositories and the emergence of numerous metadata schemes have spurred a reexamination of the way subject data are to be provided for such resources efficiently and effectively. To address this need, OCLC in cooperation with the Library of Congress, has taken a new approach, called FAST (Faceted Application of Subject Terminology). FAST headings are based on the existing vocabulary in Library of Congress Subject Headings (LCSH), but are applied with a simpler syntax than required by Library of Congress application policies. Adapting the LCSH vocabulary in a simplified faceted syntax retains the rich vocabulary of LCSH while making it easier to understand, control, apply, and use.
- Source
- New pespectives on subject indexing and classification: essays in honour of Magda Heiner-Freiling. Red.: K. Knull-Schlomann, u.a
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Mischo, W.H.: ¬A subject retrieval function based on computer manipulated Library of Congress Subject Headings (1982)
0.05
0.045072496 = product of:
0.12019332 = sum of:
0.082654744 = weight(_text_:retrieval in 2841) [ClassicSimilarity], result of:
0.082654744 = score(doc=2841,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.6617001 = fieldWeight in 2841, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.109375 = fieldNorm(doc=2841)
0.022089208 = weight(_text_:of in 2841) [ClassicSimilarity], result of:
0.022089208 = score(doc=2841,freq=4.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.34207192 = fieldWeight in 2841, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.109375 = fieldNorm(doc=2841)
0.01544937 = product of:
0.03089874 = sum of:
0.03089874 = weight(_text_:on in 2841) [ClassicSimilarity], result of:
0.03089874 = score(doc=2841,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.34020463 = fieldWeight in 2841, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.109375 = fieldNorm(doc=2841)
0.5 = coord(1/2)
0.375 = coord(3/8)
- Source
- Proceedings of the ASIS Annual Meeting. 19(1982), S.197-199
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Poynder, R.: Web research engines? (1996)
0.04
0.044530775 = product of:
0.08906155 = sum of:
0.04338471 = weight(_text_:retrieval in 5698) [ClassicSimilarity], result of:
0.04338471 = score(doc=5698,freq=6.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.34732026 = fieldWeight in 5698, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=5698)
0.025667597 = weight(_text_:use in 5698) [ClassicSimilarity], result of:
0.025667597 = score(doc=5698,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.20298971 = fieldWeight in 5698, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.046875 = fieldNorm(doc=5698)
0.013388081 = weight(_text_:of in 5698) [ClassicSimilarity], result of:
0.013388081 = score(doc=5698,freq=8.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.20732689 = fieldWeight in 5698, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=5698)
0.006621159 = product of:
0.013242318 = sum of:
0.013242318 = weight(_text_:on in 5698) [ClassicSimilarity], result of:
0.013242318 = score(doc=5698,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.14580199 = fieldWeight in 5698, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.046875 = fieldNorm(doc=5698)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Describes the shortcomings of search engines for the WWW comparing their current capabilities to those of the first generation CD-ROM products. Some allow phrase searching and most are improving their Boolean searching. Few allow truncation, wild cards or nested logic. They are stateless, losing previous search criteria. Unlike the indexing and classification systems for today's CD-ROMs, those for Web pages are random, unstructured and of variable quality. Considers that at best Web search engines can only offer free text searching. Discusses whether automatic data classification systems such as Infoseek Ultra can overcome the haphazard nature of the Web with neural network technology, and whether Boolean search techniques may be redundant when replaced by technology such as the Euroferret search engine. However, artificial intelligence is rarely successful on huge, varied databases. Relevance ranking and automatic query expansion still use the same simple inverted indexes. Most Web search engines do nothing more than word counting. Further complications arise with foreign languages
- Theme
- Verbale Doksprachen im Online-Retrieval
Klassifikationssysteme im Online-Retrieval
Semantisches Umfeld in Indexierung u. Retrieval
-
Cochrane, P.A.: Improving LCSH for use in online catalogs revisited : What progress has been made? What issues still remain? (2000)
0.04
0.044025455 = product of:
0.08805091 = sum of:
0.025048172 = weight(_text_:retrieval in 5609) [ClassicSimilarity], result of:
0.025048172 = score(doc=5609,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.20052543 = fieldWeight in 5609, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=5609)
0.036299463 = weight(_text_:use in 5609) [ClassicSimilarity], result of:
0.036299463 = score(doc=5609,freq=4.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.2870708 = fieldWeight in 5609, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.046875 = fieldNorm(doc=5609)
0.02008212 = weight(_text_:of in 5609) [ClassicSimilarity], result of:
0.02008212 = score(doc=5609,freq=18.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.3109903 = fieldWeight in 5609, product of:
4.2426405 = tf(freq=18.0), with freq of:
18.0 = termFreq=18.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=5609)
0.006621159 = product of:
0.013242318 = sum of:
0.013242318 = weight(_text_:on in 5609) [ClassicSimilarity], result of:
0.013242318 = score(doc=5609,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.14580199 = fieldWeight in 5609, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.046875 = fieldNorm(doc=5609)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- In 1986 Libraries Unlimited published Cochrane's book, Improving LCSH for Use in Online Catalogs; Exercises for Self-Help with a Selection of Background Readings. This was preceded in 1981 by an ERIC publication (ED 208 900) by Cochrane, with Monika Kirtland Bibliographic and Bibliometric Essay which documented critical views of LCSH and an analysis of vocabulary control in LCSH (parts of which were published in Cataloging & Classification Quarterly' 1(2/3) (1982), 71-94). Three features of LCSH will be re-examined to check on progress since the time of these earlier publications: notes, structure of relationships between headings in the list, and links between Library of Congress classification numbers and LCSH or other vocabularies
- Source
- The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T. Stone
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Geißelmann, F. (Hrsg.): Sacherschließung in Online-Katalogen (1994)
0.04
0.041400407 = product of:
0.11040109 = sum of:
0.014611433 = weight(_text_:retrieval in 4360) [ClassicSimilarity], result of:
0.014611433 = score(doc=4360,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.11697317 = fieldWeight in 4360, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.02734375 = fieldNorm(doc=4360)
0.08194311 = sum of:
0.010924355 = weight(_text_:on in 4360) [ClassicSimilarity], result of:
0.010924355 = score(doc=4360,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.120280504 = fieldWeight in 4360, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.02734375 = fieldNorm(doc=4360)
0.071018755 = weight(_text_:line in 4360) [ClassicSimilarity], result of:
0.071018755 = score(doc=4360,freq=4.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.3066789 = fieldWeight in 4360, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.02734375 = fieldNorm(doc=4360)
0.013846547 = product of:
0.027693095 = sum of:
0.027693095 = weight(_text_:22 in 4360) [ClassicSimilarity], result of:
0.027693095 = score(doc=4360,freq=4.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19150631 = fieldWeight in 4360, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02734375 = fieldNorm(doc=4360)
0.5 = coord(1/2)
0.375 = coord(3/8)
- Date
- 15. 7.2018 16:22:16
- Footnote
- Rez. in: Mitteilungen VÖB 48(1995) H.1, S.66-68 (K. Niedermair) - Vgl. auch Lepsky, K. in: Bibliotheksdienst 29(1995) H.3, S.500-519; Bibliothek: Forschung u. Praxis 19(1995) H.2, S.251-254 (G. Hartwieg; auch in: LDV-Forum Bd. 12, Nr. 2, Jg. 1995, S.22-29 [unter: http://www.jlcl.org/1995_Heft2/Rezensionen_19-27.pdf]) .
- RSWK
- Inhaltserschliessung / On-line-Katalog (ÖVK)
- Subject
- Inhaltserschliessung / On-line-Katalog (ÖVK)
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Broughton, V.: Structural, linguistic and mathematical elements in indexing languages and search engines : implications for the use of index languages in electronic and non-LIS environments (2000)
0.04
0.04119263 = product of:
0.08238526 = sum of:
0.036153924 = weight(_text_:retrieval in 96) [ClassicSimilarity], result of:
0.036153924 = score(doc=96,freq=6.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.28943354 = fieldWeight in 96, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=96)
0.021389665 = weight(_text_:use in 96) [ClassicSimilarity], result of:
0.021389665 = score(doc=96,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 96, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=96)
0.019324033 = weight(_text_:of in 96) [ClassicSimilarity], result of:
0.019324033 = score(doc=96,freq=24.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.2992506 = fieldWeight in 96, product of:
4.8989797 = tf(freq=24.0), with freq of:
24.0 = termFreq=24.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=96)
0.0055176322 = product of:
0.0110352645 = sum of:
0.0110352645 = weight(_text_:on in 96) [ClassicSimilarity], result of:
0.0110352645 = score(doc=96,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.121501654 = fieldWeight in 96, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=96)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- The paper looks at ways in which traditional classification and indexing tools have dealt with the relationships between constituent terms; variations in these are examined and compared with the methods used in machine searching, particularly of the Internet and World Wide Web. Apparent correspondences with features of index languages are identified, and further methods of applying classification and indexing theory to machine retrieval are proposed. There are various ways in which indexing and retrieval systems, both conventional and electronic, deal with the problem of searching for documents on a subject basis, and various approaches to the analysis and processing of a query. There appear to be three basic models; the taxonomic or structural system, in which the user is offered a map of the `universe of knowledge'; the language based system, which offers a vocabulary of the subject and a grammar for dealing with compound statements; and the mathematical model using the language of symbolic logic or the algebra of set theory
- Source
- Dynamism and stability in knowledge organization: Proceedings of the 6th International ISKO-Conference, 10-13 July 2000, Toronto, Canada. Ed.: C. Beghtol et al
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Studwell, W.E.: Of eggs and baskets : getting more access out of LC Subject Headings in an online environment (1991)
0.04
0.040121976 = product of:
0.10699194 = sum of:
0.029222867 = weight(_text_:retrieval in 515) [ClassicSimilarity], result of:
0.029222867 = score(doc=515,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23394634 = fieldWeight in 515, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=515)
0.05186718 = weight(_text_:use in 515) [ClassicSimilarity], result of:
0.05186718 = score(doc=515,freq=6.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.4101866 = fieldWeight in 515, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=515)
0.025901893 = weight(_text_:of in 515) [ClassicSimilarity], result of:
0.025901893 = score(doc=515,freq=22.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.40111488 = fieldWeight in 515, product of:
4.690416 = tf(freq=22.0), with freq of:
22.0 = termFreq=22.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=515)
0.375 = coord(3/8)
- Abstract
- Libraries using the LCSH can increase the effectiveness of their subject access. This can be accomplished through one of four methods for applying an increased number of headings: the addition of subject headings in situations where none have been supplied by LC; the use of pattern secondary headings; the use of major + minor techniques; and the use of minor + major techniques. Each of these methods will provide additional subject access to supplement that produced by the Library of Congress
- Theme
- Verbale Doksprachen im Online-Retrieval
