-
Sauperl, A.: Precoordination or not? : a new view of the old question (2009)
0.05
0.04591843 = product of:
0.10331647 = sum of:
0.0147471 = weight(_text_:information in 3611) [ClassicSimilarity], result of:
0.0147471 = score(doc=3611,freq=10.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.21684799 = fieldWeight in 3611, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0390625 = fieldNorm(doc=3611)
0.033917036 = weight(_text_:retrieval in 3611) [ClassicSimilarity], result of:
0.033917036 = score(doc=3611,freq=6.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.28943354 = fieldWeight in 3611, 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=3611)
0.04153061 = weight(_text_:techniques in 3611) [ClassicSimilarity], result of:
0.04153061 = score(doc=3611,freq=2.0), product of:
0.17065717 = queryWeight, product of:
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.038739666 = queryNorm
0.24335694 = fieldWeight in 3611, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.0390625 = fieldNorm(doc=3611)
0.013121725 = product of:
0.02624345 = sum of:
0.02624345 = weight(_text_:22 in 3611) [ClassicSimilarity], result of:
0.02624345 = score(doc=3611,freq=2.0), product of:
0.13565971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.038739666 = queryNorm
0.19345059 = fieldWeight in 3611, 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=3611)
0.5 = coord(1/2)
0.44444445 = coord(4/9)
- Abstract
- Purpose - This paper aims to discuss some long-standing issues of the development of a subject heading language as pre- or postcoordinated. Design/methodology/approach - In a review of literature on pre- and postcoordination and user behaviour, 20 criteria originally discussed by Svenonius are considered. Findings - The advantages and disadvantages of pre- and postcoordinated systems are on a very similar level. Most subject heading languages developed recently are precoordinated. They all require investments in highly skilled intellectual work, and are therefore expensive and difficult to maintain. Postcoordinated systems seem to have more advantages for information providers, but less for users. However, most of these disadvantages could be overcome by known information retrieval models and techniques. Research limitations/implications - The criteria originally discussed by Svenonius are difficult to evaluate in an exact manner. Some of them are also irrelevant because of changes in information retrieval systems. Practical implications - It was found that the decision on whether to use a pre- or postcoordinated system cannot be taken independent of consideration of the subject authority file and the functions of an information retrieval system, which should support users on one hand and information providers and indexers on the other. Originality/value - This literature review brings together some findings that have not been considered together previously.
- Date
- 20. 6.2010 14:22:43
-
Villiers, L. de: On-line subject retrieval on CPALS : help us choose! (1996)
0.03
0.030891793 = product of:
0.13901307 = sum of:
0.10768185 = weight(_text_:line in 4935) [ClassicSimilarity], result of:
0.10768185 = score(doc=4935,freq=2.0), product of:
0.21724595 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.038739666 = queryNorm
0.4956679 = fieldWeight in 4935, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0625 = fieldNorm(doc=4935)
0.031331215 = weight(_text_:retrieval in 4935) [ClassicSimilarity], result of:
0.031331215 = score(doc=4935,freq=2.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.26736724 = fieldWeight in 4935, 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=4935)
0.22222222 = coord(2/9)
-
Studwell, W.E.: ¬The three camps : the present and possible future status of subject access in online catalogues (1996)
0.02
0.02172893 = product of:
0.09778018 = sum of:
0.031331215 = weight(_text_:retrieval in 6579) [ClassicSimilarity], result of:
0.031331215 = score(doc=6579,freq=2.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.26736724 = fieldWeight in 6579, 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=6579)
0.06644897 = weight(_text_:techniques in 6579) [ClassicSimilarity], result of:
0.06644897 = score(doc=6579,freq=2.0), product of:
0.17065717 = queryWeight, product of:
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.038739666 = queryNorm
0.3893711 = fieldWeight in 6579, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.0625 = fieldNorm(doc=6579)
0.22222222 = coord(2/9)
- Abstract
- Considers the future of LCSH and whether their viability can be maintained through a written standardization code. Until there is an online substitute for LC subject headings which has been tested on a large scale over a period of time, a successor to the present combination of LC's controlled vocabulary headings plus computerized techniques such as keyword searching is unlikely to emerge
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Chan, L.M.; Hodges, T.: Entering the millennium : a new century for LCSH (2000)
0.02
0.01896399 = product of:
0.05689197 = sum of:
0.007914125 = weight(_text_:information in 5920) [ClassicSimilarity], result of:
0.007914125 = score(doc=5920,freq=2.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.116372846 = fieldWeight in 5920, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=5920)
0.033231772 = weight(_text_:retrieval in 5920) [ClassicSimilarity], result of:
0.033231772 = score(doc=5920,freq=4.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.2835858 = fieldWeight in 5920, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=5920)
0.01574607 = product of:
0.03149214 = sum of:
0.03149214 = weight(_text_:22 in 5920) [ClassicSimilarity], result of:
0.03149214 = score(doc=5920,freq=2.0), product of:
0.13565971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.038739666 = queryNorm
0.23214069 = fieldWeight in 5920, 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=5920)
0.5 = coord(1/2)
0.33333334 = coord(3/9)
- Abstract
- Library of Congress Subject Headings (LCSH), a system originally designed as a tool for subject access to the Library's own collection in the late nineteenth century, has become, in the course of the last century, the main subject retrieval tool in library catalogs throughout the United States and in many other countries. It is one of the largest non-specialized controlled vocabularies in the world. As LCSH enters a new century, it faces an information environment that has undergone vast changes from what had prevailed when LCSH began, or, indeed, from its state in the early days of the online age. In order to continue its mission and to be useful in spheres outside library catalogs as well, LCSH must adapt to the multifarious environment. One possible approach is to adopt a series of scalable and flexible syntax and application rules to meet the needs of different user communities
- Date
- 27. 5.2001 16:22:21
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Studwell, W.E.: Why not an 'AACR' for subject headings? (1985)
0.02
0.017002948 = product of:
0.07651326 = sum of:
0.05814285 = weight(_text_:techniques in 363) [ClassicSimilarity], result of:
0.05814285 = score(doc=363,freq=2.0), product of:
0.17065717 = queryWeight, product of:
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.038739666 = queryNorm
0.3406997 = fieldWeight in 363, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.0546875 = fieldNorm(doc=363)
0.018370414 = product of:
0.03674083 = sum of:
0.03674083 = weight(_text_:22 in 363) [ClassicSimilarity], result of:
0.03674083 = score(doc=363,freq=2.0), product of:
0.13565971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.038739666 = queryNorm
0.2708308 = fieldWeight in 363, 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=363)
0.5 = coord(1/2)
0.22222222 = coord(2/9)
- Date
- 7. 1.2007 13:22:01
- Footnote
- Simultaneously published as Computer Software Cataloging: Techniques and Examples
-
Anderson, J.D.; Pérez-Carballo, J.: Library of Congress Subject Headings (LCSH) (2009)
0.02
0.015719537 = product of:
0.047158606 = sum of:
0.007914125 = weight(_text_:information in 3837) [ClassicSimilarity], result of:
0.007914125 = score(doc=3837,freq=2.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.116372846 = fieldWeight in 3837, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=3837)
0.023498412 = weight(_text_:retrieval in 3837) [ClassicSimilarity], result of:
0.023498412 = score(doc=3837,freq=2.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.20052543 = fieldWeight in 3837, 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=3837)
0.01574607 = product of:
0.03149214 = sum of:
0.03149214 = weight(_text_:22 in 3837) [ClassicSimilarity], result of:
0.03149214 = score(doc=3837,freq=2.0), product of:
0.13565971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.038739666 = queryNorm
0.23214069 = fieldWeight in 3837, 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=3837)
0.5 = coord(1/2)
0.33333334 = coord(3/9)
- Date
- 27. 8.2011 14:22:13
- Source
- Encyclopedia of library and information sciences. 3rd ed. Ed.: M.J. Bates
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Bodoff, D.; Kambil, A.: Partial coordination : II. A preliminary evaluation and failure analysis (1998)
0.02
0.015278084 = product of:
0.06875138 = sum of:
0.011192262 = weight(_text_:information in 2323) [ClassicSimilarity], result of:
0.011192262 = score(doc=2323,freq=4.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.16457605 = fieldWeight in 2323, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=2323)
0.057559118 = weight(_text_:retrieval in 2323) [ClassicSimilarity], result of:
0.057559118 = score(doc=2323,freq=12.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.49118498 = fieldWeight in 2323, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=2323)
0.22222222 = coord(2/9)
- Abstract
- Partial coordination is a new method for cataloging documents for subject access. It is especially designed to enhance the precision of document searches in online environments. This article reports a preliminary evaluation of partial coordination that shows promising results compared with full-text retrieval. We also report the difficulties in empirically evaluating the effectiveness of automatic full-text retrieval in contrast to mixed methods such as partial coordination which combine human cataloging with computerized retrieval. Based on our study, we propose research in this area will substantially benefit from a common framework for failure analysis and a common data set. This will allow information retrieval researchers adapting 'library style'cataloging to large electronic document collections, as well as those developing automated or mixed methods, to directly compare their proposals for indexing and retrieval. This article concludes by suggesting guidelines for constructing such as testbed
- Source
- Journal of the American Society for Information Science. 49(1998) no.14, S.1270-1282
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Miller, U.; Teitelbaum, R.: Pre-coordination and post-coordination : past and future (2002)
0.01
0.014655587 = product of:
0.06595014 = sum of:
0.018466292 = weight(_text_:information in 1395) [ClassicSimilarity], result of:
0.018466292 = score(doc=1395,freq=8.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.27153665 = fieldWeight in 1395, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0546875 = fieldNorm(doc=1395)
0.04748385 = weight(_text_:retrieval in 1395) [ClassicSimilarity], result of:
0.04748385 = score(doc=1395,freq=6.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.40520695 = fieldWeight in 1395, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=1395)
0.22222222 = coord(2/9)
- Abstract
- This article deals with the meaningful processing of information in relation to two systems of Information processing: pre-coordination and post-coordination. The different approaches are discussed, with emphasis an the need for a controlled vocabulary in information retrieval. Assigned indexing, which employs a controlled vocabulary, is described in detail. Types of indexing language can be divided into two broad groups - those using pre-coordinated terms and those depending an post-coordination. They represent two different basic approaches in processing and Information retrieval. The historical development of these two approaches is described, as well as the two tools that apply to these approaches: thesauri and subject headings.
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Austin, D.: PRECIS: Introduction (1987)
0.01
0.013961128 = product of:
0.06282508 = sum of:
0.01582825 = weight(_text_:information in 805) [ClassicSimilarity], result of:
0.01582825 = score(doc=805,freq=2.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.23274569 = fieldWeight in 805, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.09375 = fieldNorm(doc=805)
0.046996824 = weight(_text_:retrieval in 805) [ClassicSimilarity], result of:
0.046996824 = score(doc=805,freq=2.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.40105087 = fieldWeight in 805, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.09375 = fieldNorm(doc=805)
0.22222222 = coord(2/9)
- Footnote
- Zusammenfassende kompakte Darstellung des Systems PRECIS, seiner Geschichte, Eigenschaften und Möglichkeiten bis hin zum Online-Retrieval. - Als Einführung zu empfehlen
- Source
- Encyclopedia of library and information science. Vol.42, [=Suppl.7]
-
Dutta, A.: ¬A journey from Cutter to Austin : critical analysis of their contribution in subject indexing (2017)
0.01
0.013561998 = product of:
0.061028987 = sum of:
0.011192262 = weight(_text_:information in 1535) [ClassicSimilarity], result of:
0.011192262 = score(doc=1535,freq=4.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.16457605 = fieldWeight in 1535, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=1535)
0.049836725 = weight(_text_:techniques in 1535) [ClassicSimilarity], result of:
0.049836725 = score(doc=1535,freq=2.0), product of:
0.17065717 = queryWeight, product of:
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.038739666 = queryNorm
0.2920283 = fieldWeight in 1535, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.046875 = fieldNorm(doc=1535)
0.22222222 = coord(2/9)
- Abstract
- This writeup presents the fundamentals of subject indexing in terms of its development, scope, coverage, role in subject indexing techniques and the important elements to design a well-structured and effective subject indexing process, requirements and the infrastructure. From the time of RDC to PRECIS, the developers has been envisaged the problems to expand the flexibility and versatility of indexing technique. Whenever one indexing process is failed to achieve the maximum efficiency another is developed on the basis of failure. It concludes that all the developments of subject indexing processes during that era are leads to the innovation of Artificial Intelligence technique (AI), i.e. Natural Language Processing (NLP) by implementation of Information and Communication Technology (ICT) in present time.
- Source
- International journal of library and information studies. 7(2017) no.4, S.338-350
-
Bodoff, D.; Kambil, A.: Partial coordination : I. The best of pre-coordination and post-coordination (1998)
0.01
0.0108032385 = product of:
0.048614573 = sum of:
0.007914125 = weight(_text_:information in 2322) [ClassicSimilarity], result of:
0.007914125 = score(doc=2322,freq=2.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.116372846 = fieldWeight in 2322, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=2322)
0.040700447 = weight(_text_:retrieval in 2322) [ClassicSimilarity], result of:
0.040700447 = score(doc=2322,freq=6.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.34732026 = fieldWeight in 2322, 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=2322)
0.22222222 = coord(2/9)
- Abstract
- The introduction of computerized post-coordination has solved many of the problems of pre-coordinated subject access. However, the adoption of computerized post-coordination results in the loss of some pre-coordination benefits. Specifically, the effect of hiding terms within the context of others is lost in post-coodination which give lead status to every document term. This results in spurious matches of terms out of context. Library patrons and Internet searchers are increasingly dissatisfied with subject access performance, in part because of unmanageably large retrieval sets. The need to enhance precision and limit the size of retrieval sets motivates this work which proposes partial coordination, an approach which incorporates the advantages of computer search with the ability of pre-coordination to limit spurious partial matches and thereby enhance precision
- Source
- Journal of the American Society for Information Science. 49(1998) no.14, S.1254-1269
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Satija, M.P.; Haynes, D.E.: User's Guide to Sears List of Subject Headings (2008)
0.01
0.010694603 = product of:
0.048125714 = sum of:
0.0065951035 = weight(_text_:information in 3341) [ClassicSimilarity], result of:
0.0065951035 = score(doc=3341,freq=2.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.09697737 = fieldWeight in 3341, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0390625 = fieldNorm(doc=3341)
0.04153061 = weight(_text_:techniques in 3341) [ClassicSimilarity], result of:
0.04153061 = score(doc=3341,freq=2.0), product of:
0.17065717 = queryWeight, product of:
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.038739666 = queryNorm
0.24335694 = fieldWeight in 3341, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.0390625 = fieldNorm(doc=3341)
0.22222222 = coord(2/9)
- Footnote
- Rez. in: KO 36(2009) nos.2/3, S.180-181 (N.K. Swain): " ... The User's Guide will undoubtedly be of great help to practitioners and tutors, as each chapter includes a summary and exercises. The purpose suggested by the title is fulfilled, serving as a companion to the 19th edition of the Sears List. It is designed a a manual for beginners who will realize the importance of vocabulary control and subject analysis, and start to comprehend the structure and organization of the Sears List as well as the methods and techniques to locate, specify, and construct subject headings. The book, however, lacks a good number of examples for practice. The emphasis seems to have been put more on the theoretical than the practical aspects. Despite this criticism, I unreservedly value the authors' efforts. At the same time, I can't help but wonder if the book will have wide access as the place of publication, the cost and the availability will especially affect the users in developing countries. The User's Guide will be a valuable tool to technical services librarians, subject catalogers, students and teachers of library and information science. It is intended for college and university libraries in general, but more particularly for library schools. The authors produced a work of high quality that stands out in its category.
-
Williamson, N.J.: Subject cataloguing and LCSH (1991)
0.01
0.010278719 = product of:
0.046254233 = sum of:
0.014923017 = weight(_text_:information in 7926) [ClassicSimilarity], result of:
0.014923017 = score(doc=7926,freq=4.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.21943474 = fieldWeight in 7926, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0625 = fieldNorm(doc=7926)
0.031331215 = weight(_text_:retrieval in 7926) [ClassicSimilarity], result of:
0.031331215 = score(doc=7926,freq=2.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.26736724 = fieldWeight in 7926, 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=7926)
0.22222222 = coord(2/9)
- Abstract
- Discusses subject headings, in particular. Library of Congress Subject Headings as a standard for subject representation of documents in library catalogues. Addresses: the characteristics of LCSH, its use in subject cataloguing and retrieval and its place in online catalogues. Considers the future of LCSH
- Source
- Standards for the international exchange of bibliographic information: papers presented at a course held at the School of Library, Archive and Information Studies, University College, London, 3-18 August 1990. Ed.: I.C. McIlwaine
-
Yi, K.; Chan, L.M.: Revisiting the syntactical and structural analysis of Library of Congress Subject Headings for the digital environment (2010)
0.01
0.009872008 = product of:
0.044424035 = sum of:
0.011192262 = weight(_text_:information in 3431) [ClassicSimilarity], result of:
0.011192262 = score(doc=3431,freq=4.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.16457605 = fieldWeight in 3431, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=3431)
0.033231772 = weight(_text_:retrieval in 3431) [ClassicSimilarity], result of:
0.033231772 = score(doc=3431,freq=4.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.2835858 = fieldWeight in 3431, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=3431)
0.22222222 = coord(2/9)
- Abstract
- With the current information environment characterized by the proliferation of digital resources, including collaboratively created and shared resources, Library of Congress Subject Headings (LCSH) is facing the challenges of effective and efficient subject-based organization and retrieval of digital resources. To explore the feasibility of utilizing LCSH in a digital environment, we might need to revisit its basic characteristics. The objectives of our study were to analyze LCSH in both syntactic and relational structures, to discover the structural characteristics of LCSH, and to identify problems and issues for the feasibility of LCSH as an effective subject access tool. This study reports and discusses issues raised by the syntactic and hierarchical structures of LCSH that present challenges to its use in a networked environment. Given the results of this study, we recommend a number of provisional future directions for the development of LCSH towards further becoming a viable system for digital and networked resources.
- Source
- Journal of the American Society for Information Science and Technology. 61(2010) no.4, S.677-687
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Prasher, R.G.: Index and indexing (1990)
0.01
0.009229024 = product of:
0.08306122 = sum of:
0.08306122 = weight(_text_:techniques in 4777) [ClassicSimilarity], result of:
0.08306122 = score(doc=4777,freq=2.0), product of:
0.17065717 = queryWeight, product of:
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.038739666 = queryNorm
0.4867139 = fieldWeight in 4777, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.405231 = idf(docFreq=1467, maxDocs=44218)
0.078125 = fieldNorm(doc=4777)
0.11111111 = coord(1/9)
- Abstract
- Reviews the evolution of subject indexing techniques such as: Chain indexing; POPSI; PRECIS, post-coordinate indexing; keyword indexing; and citation indexing. Specific developments that have taken place in India are reviewed
-
Sears' list of subject headings (2007)
0.01
0.008021125 = product of:
0.03609506 = sum of:
0.010552166 = weight(_text_:information in 4617) [ClassicSimilarity], result of:
0.010552166 = score(doc=4617,freq=8.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.1551638 = fieldWeight in 4617, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.03125 = fieldNorm(doc=4617)
0.025542893 = product of:
0.051085785 = sum of:
0.051085785 = weight(_text_:theories in 4617) [ClassicSimilarity], result of:
0.051085785 = score(doc=4617,freq=2.0), product of:
0.21161452 = queryWeight, product of:
5.4624767 = idf(docFreq=509, maxDocs=44218)
0.038739666 = queryNorm
0.24140964 = fieldWeight in 4617, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.4624767 = idf(docFreq=509, maxDocs=44218)
0.03125 = fieldNorm(doc=4617)
0.5 = coord(1/2)
0.22222222 = coord(2/9)
- Footnote
- Rez. in: KO 35(2008) no.1, S.55-58 (M.P. Satija): "The Sears List, first published in 1923, has survived times of destabilizing changes while keeping reasonable continuity with the past. Dr. Joseph Miller, at the helm since 1992 and the longest-serving editor in the eighty-four years of the List's existence, first edited the 15th edition of the Sears (1994). Over the years, the Sears has achieved more than it had hoped for: ever-increasing use the world over. In fact, the turbulent progress of media and information theories has forced the Sears to keep up with the changing times. Knowledge organization is a shifting sand in the electronic era. Vast and varied changes generate not only new information, but also new terms and phrases. It is trite to say that the electronic media have transformed the way in which we access information and knowledge. The new edition of the Sears has absorbed these changes to reflect the times. The 19th edition, released in May 2007, has about 440 new headings, to bring the new total to over 8000 headings, which keeps the growth rate at five percent. Newly-added headings generally fall into one of two categories: a) headings for the new and current subjects and b) headings previously missed. A few more have been modified. New editions are produced regularly to: - incorporate terms for new subjects, - restructure the form of old headings to suit the changing information needs and informationseeking behaviour of the users, - add new terms to old subject headings to reflect current usage, - delete the obsolete subjects, - forge new relations between subjects and their terms. Two major areas of new additions are in the fields of Islam, as might be expected, and the graphic novel- the latter has thirty headings perhaps drawn from the WilsonWeb Database on Graphic Novels Core Collection. ... The lapses are minor and could be forgiven; they in no way detract from this continuously-expanding and well-established tool for subject-cataloguing in small and medium libraries. The handy List and its lucid introduction make Sears an excellent and convenient tool for teaching subject headings' use and principles, as well as methods of vocabulary control. With its glossy and flowery cover, clear typeface and high production standards, the new edition is particularly welcome."
-
Lopes, M.I.: Principles underlying subject heading languages : an international approach (1996)
0.01
0.0052759834 = product of:
0.04748385 = sum of:
0.04748385 = weight(_text_:retrieval in 5608) [ClassicSimilarity], result of:
0.04748385 = score(doc=5608,freq=6.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.40520695 = fieldWeight in 5608, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=5608)
0.11111111 = coord(1/9)
- Abstract
- Discusses the problems in establishing commonly accepted principles for subject retrieval between different bibliographic systems. The Working Group on Principles Underlying Subject Heading Languages was established to devise general principles for any subject retrieval system and to review existing real systems in the light of such principles and compare them in order to evaluate the extent of their coverage and their application in current practices. Provides a background and history of the Working Group. Discusses the principles underlying subject headings and their purposes and the state of the work and major findings
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Hartley, J.; Sydes, M.: Which layout do you prefer? : an analysis of readers' preferences for different typographic layouts of structured abstracts (1996)
0.01
0.005257821 = product of:
0.023660194 = sum of:
0.007914125 = weight(_text_:information in 4411) [ClassicSimilarity], result of:
0.007914125 = score(doc=4411,freq=2.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.116372846 = fieldWeight in 4411, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=4411)
0.01574607 = product of:
0.03149214 = sum of:
0.03149214 = weight(_text_:22 in 4411) [ClassicSimilarity], result of:
0.03149214 = score(doc=4411,freq=2.0), product of:
0.13565971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.038739666 = queryNorm
0.23214069 = fieldWeight in 4411, 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=4411)
0.5 = coord(1/2)
0.22222222 = coord(2/9)
- Source
- Journal of information science. 22(1996) no.1, S.27-37
-
Geißelmann, F.: RSWK für den Online-Katalog : Werkstattbericht zur 3. Auflage (1997)
0.01
0.0052218693 = product of:
0.046996824 = sum of:
0.046996824 = weight(_text_:retrieval in 411) [ClassicSimilarity], result of:
0.046996824 = score(doc=411,freq=2.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.40105087 = fieldWeight in 411, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.09375 = fieldNorm(doc=411)
0.11111111 = coord(1/9)
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Frommeyer, J.: Zeitbegriffe und Zeitcodierungen in allgemeinbibliographischen Datenbanken : eine Analyse von RSWK, LCSH und RAMEAU sowie Entwicklung eines theoretischen Modells für ein Zeitretrieval (2003)
0.00
0.0048048804 = product of:
0.021621961 = sum of:
0.0046634427 = weight(_text_:information in 2203) [ClassicSimilarity], result of:
0.0046634427 = score(doc=2203,freq=4.0), product of:
0.06800663 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.038739666 = queryNorm
0.068573356 = fieldWeight in 2203, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.01953125 = fieldNorm(doc=2203)
0.016958518 = weight(_text_:retrieval in 2203) [ClassicSimilarity], result of:
0.016958518 = score(doc=2203,freq=6.0), product of:
0.1171842 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.038739666 = queryNorm
0.14471677 = fieldWeight in 2203, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.01953125 = fieldNorm(doc=2203)
0.22222222 = coord(2/9)
- Footnote
- - Retrievalmöglichkeiten - Ein Test der Retrievalmöglichkeiten von Zeitangaben in den Online-Katalogen der LoC, BnF und DDB zeigte, dass für ein optimales Suchergebnis viele Recherche-Schritte und Regelwerkskenntnisse notwendig sind, eine aus Nutzersicht unbefriedigende Bilanz. Zum Beispiel muss für Suchanfragen nach Jahreszahlen der Zeitraum genauso angegeben werden, wie es bei der Indexierung geschah, oder eine Suche mit Epochenbegriffen und zeitimmanenten Schlagwörtern erfordert die genaue Kenntnis der Ansetzungsregeln für solche Deskriptoren. Die angebotenen Schlagwortketten sind eine Suchhilfe, erlauben aber keine Sortierung nach der Zeitenabfolge. Der größte Mangel ist, dass alle Zeitcodierungen nur als Zeichen, nicht als Zahlen, erkennbar sind, sodass bei der Suche nur ein Zeichenabgleich erfolgt und keine Sortierung nach Zahlen möglich ist. Jutta Frommeyer stellt die Retrievalmöglichkeiten der drei genannten Bibliothekskataloge verschiedenen anderen Datenbanken gegenüber, die eine Suche nach Zeitangaben anbieten. Die Suchmöglichkeiten bei den Allgemeinenzyklopädien (»Encyclopedia Britannica«, »Brockhaus-Enzyklopädie«, »Encarta«) sind vielfältig und elaboriert. Zeitimmanente Begriffe sind chronologisch angeordnet und auch grafisch durch Zeitschienen dargestellt, von denen aus auf ein Jahr oder einen Zeitbegriff gesprungen werden kann. Die Datenbank »Historical abstracts« bietet den Zeitraum, der in einem Dokument behandelt wird, über eine spezielle Codierung an. Die »Jahresberichte für deutsche Geschichte« bieten für das Zeitretrieval eine Tabelle mit 14 verschiedenen Möglichkeiten; die weitere Differenzierung der Suchanfrage erfolgt hier durch andere Sacherschließungselemente wie eine ausgefeilte Klassifikation und eine Schlagwortliste. - Modell zum optimalen Zeitretrieval - Aufgrund ihrer Untersuchungen entwickelt die Autorin ein theoretisches Modell für ein optimales Zeitretrieval in allgemeinbibliografischen Datenbanken mit den drei Elementen Zeitcode, Chronikcode und Chroniknormdatei. Damit die Zeitcodierungen als Zahlen und nicht als Zeichen erkennbar sind, müssen sie in einem besonderen numerischen Feld (Zeitcode) abgelegt werden; mit der Möglichkeit, nach Zeiträumen zu suchen (Größer-, Kleiner- und Gleichoperatoren). Die Zeitspannen von Zeitbegriffen werden als Chronikcode in der gleichen Datenstruktur wie der Zeitcode bei den Normdatensätzen ergänzt. Für bestimmte Zeitbegriffe ist eine Normierung notwendig (z. B. Mittelalter). Bei kulturkreisabhängigen Zeitbegriffen kann die zeitliche Codierung verschieden aussehen. Die Chroniknormdatei soll die chronologische Relation der zeitimmanenten Begriffe darstellen und bei umfassenden Zeitspannen große Trefferzahlen vermeiden. Da zeitimmanente Begriffe über alle Sachgebiete streuen, muss für das Retrieval eine sachliche Einschränkung gegeben sein. Jutta Frommeyer schlägt dafür eine international angewandte Klassifikation vor. Die Autorin stellt ein Retrievalmodell dar, um das Zusammenwirken von Zeitcode,Chronikcode und Chroniknormdatei zu demonstrieren. Dabei hat sie sich an der heutigen Menü-Oberfläche für OPACs orientiert und ein neues Suchfeld »Zeitabschnitt« mit verschiedenen Unterteilungen eingeführt. Ihre Beispiele sind nachvollziehbar und verdeutlichen ihren Vorschlag. Die Umsetzung eines solchen Modells hat Auswirkungen auf die vorhandenen Datenstrukturen; auch wird eine Annäherung der Regeln für die Schlagwortvergabe nach RSWK, Rameau und LCSH notwendig sein, wenn so eine Suche international angeboten werden soll.
- RSWK
- Information Retrieval / Zeitraum (21)
- Subject
- Information Retrieval / Zeitraum (21)
