-
Voorbij, H.: ¬Een goede titel behoeft geen trefwoord, of toch wel? : een vergelijkend oderzoek titelwoorden - trefwoorden (1997)
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- Abstract
- A recent survey at the Royal Library in the Netherlands showed that subject headings are more efficient than title keywords for retrieval purposes. 475 Dutch publications were selected at random and assigned subject headings. The study showed that subject headings provided additional useful information in 56% of titles. Subsequent searching of the library's online catalogue showed that 88% of titles were retrieved via subject headings against 57% through title keywords. Further precision may be achieved with the help of indexing staff, but at considerable cost
- Footnote
- Übers. d. Titels: A good title has no need of subject headings, or does it?: a comparative study of title keywords against subject headings
-
McJunkin, M.C.: Precision and recall in title keyword searching (1995)
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- Abstract
- Investigates the extent to which title keywords convey subject content and compares the relative effectiveness of searching title keywords using 2 search strategies to examine whether adjacency operators in title keyword searches are effective in improving recall and precision of online searching. Title keywords from a random sample of titles in the field of economics were searched on FirstSearch, using the WorldCat database, which is equivalent in coverage to the OCLC OLUC, with and without adjacency of the keywords specified. The LCSH of the items retrieved were compared with the sample title subject headings to determine the degree of match or relevance and the values for precision and recall were calculated. Results indicated that, when keywords were discipline specific, adjacency operators improved precision with little degradation of recall. Systems that allow positional operators or rank output by proximity of terms may increase search success
-
Schabas, A.H.: Postcoordinate retrieval : a comparison of two retrieval languages (1982)
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- Abstract
- This article reports on a comparison of the postcoordinate retrieval effectiveness of two indexing languages: LCSH and PRECIS. The effect of augmenting each with title words was also studies. The database for the study was over 15.000 UK MARC records. Users returned 5.326 relevant judgements for citations retrieved for 61 SDI profiles, representing a wide variety of subjects. Results are reported in terms of precision and relative recall. Pure/applied sciences data and social science data were analyzed separately. Cochran's significance tests for ratios were used to interpret the findings. Recall emerged as the more important measure discriminating the behavior of the two languages. Addition of title words was found to improve recall of both indexing languages significantly. A direct relationship was observed between recall and exhaustivity. For the social sciences searches, recalls from PRECIS alone and from PRECIS with title words were significantly higher than those from LCSH alone and from LCSH with title words, respectively. Corresponding comparisons for the pure/applied sciences searches revealed no significant differences
-
Pirmann, C.: Tags in the catalogue : insights from a usability study of LibraryThing for libraries (2012)
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- Abstract
- Library of Congress Subject Headings (LCSH), the standard subject language used in library catalogues, are often criticized for their lack of currency, biased language, and atypical syndetic structure. Conversely, folksonomies (or tags), which rely on the natural language of their users, offer a flexibility often lacking in controlled vocabularies and may offer a means of augmenting more rigid controlled vocabularies such as LCSH. Content analysis studies have demonstrated the potential for folksonomies to be used as a means of enhancing subject access to materials, and libraries are beginning to integrate tagging systems into their catalogues. This study examines the utility of tags as a means of enhancing subject access to materials in library online public access catalogues (OPACs) through usability testing with the LibraryThing for Libraries catalogue enhancements. Findings indicate that while they cannot replace LCSH, tags do show promise for aiding information seeking in OPACs. In the context of information systems design, the study revealed that while folksonomies have the potential to enhance subject access to materials, that potential is severely limited by the current inability of catalogue interfaces to support tag-based searches alongside standard catalogue searches.
-
Drabenstott, K.M.; Weller, M.S.: ¬The exact-display approach for online catalog subject searching (1996)
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- Abstract
- Introducess a new approach to display retrieved subject headings in subject searching designed to encourage users to browse bibliographic information. Emphasizes the importance of the exact display approach by showing how many user queries could be candidates for this approach, demonstrates an implementation of the exact-display approach in an experimental online catalogue. End user experiences gives opportunities to make recommendations for enhancing the original design of the exact display approach so that future implementations of this approach in operational online catalogues are responsive to the needs of online catalogue users
-
Connell, T.H.: Subject cataloging (1996)
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- Abstract
- Discusses established approaches to subject access using subject headings (such as LCSH), and the demands for improved subject access associated with the widespread availability of OPACs and the evidence of problems experienced by catalogue users in subject searching
-
Intelligent information systems: progress and prospects (1986)
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- Content
- Enthält die Beiträge: SOMMERVILLE, I., M. WOOD: A software components catalogue; COELHO, H.: Library manager: a case study in knowledge engineering; DAVIES, R.: Cataloguing as a domain for an expert system; POLLITT, A.S.: A rule-base system as an intermediary for searching cancer therapy literature on MEDLINE; LEBOWITZ, M.: An experiment in intelligent information systems: RESEARCHER; VICKERY, A., H.M. BROOKS u. B.C. VICKERY: An expert system for referral: the PLEXUS project; RICH, E.: Users are individuals: individualizing user models; INGWERSEN, P.: Cognitive analysis and the role of the intermediary in information retrieval; SHAW, M.L.G. u. B.R. GAINES: A cognitive model for intelligent information systems; DAVIES, R.: Classification and ratiocination: a perennial quest
-
Connell, T.H.: Use of the LCSH system : realities (1996)
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- 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
-
Cousins, S.A.: Enhancing subject access to OPACs : controlled vocabulary vs. natural language (1992)
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- 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
-
Julien, C.-A.; Guastavino, C.; Bouthillier, F.: Capitalizing on information organization and information visualization for a new-generation catalogue (2012)
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-
Lambert, N.: Of thesauri and computers : reflections on the need for thesauri (1995)
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- Source
- Searcher. 3(1995) no.8, S.18-22
-
Stone, A.T.: Up-ending Cutter's pyramid : the case for making subject references to broader terms (1996)
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- Date
- 22. 4.1997 20:43:23
-
Chan, L.M.; Hodges, T.: Entering the millennium : a new century for LCSH (2000)
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- Date
- 27. 5.2001 16:22:21
-
Frommeyer, J.: Chronological terms and period subdivisions in LCSH, RAMEAU, and RSWK : development of an integrative model for time retrieval across various online catalogs (2004)
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- Date
- 10. 9.2000 17:38:22
-
Leissing, U.; Rädler, K.; Hauer, M.: Query-Expansion durch Fachthesauri : Erfahrungsbericht zu dandelon.com, Vorarlberger Parlamentsinformationssystem und vorarlberg.at (2010)
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- Source
- Wissensspeicher in digitalen Räumen: Nachhaltigkeit - Verfügbarkeit - semantische Interoperabilität. Proceedings der 11. Tagung der Deutschen Sektion der Internationalen Gesellschaft für Wissensorganisation, Konstanz, 20. bis 22. Februar 2008. Hrsg.: J. Sieglerschmidt u. H.P.Ohly
-
Anderson, J.D.; Pérez-Carballo, J.: Library of Congress Subject Headings (LCSH) (2009)
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- Date
- 27. 8.2011 14:22:13
-
Nuovo soggettario : guida al sistema italiano di indicizzazione per soggetto, prototipo del thesaurus (2007)
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- Footnote
- Rez. in: Knowledge organization 34(2007) no.1, S.58-60 (P. Buizza): "This Nuovo soggettario is the first sign of subject indexing renewal in Italy. Italian subject indexing has been based until now on Soggettario per i cataloghi delle biblioteche italiane (Firenze, 1956), a list of preferred terms and see references, with suitable hierarchical subdivisions and cross references, derived from the subject catalogue of the National Library in Florence (BNCF). New headings later used in Bibliografia nazionale italiana (BNI) were added without references, nor indeed with any real maintenance. Systematic instructions on how to combine the terms are lacking: the indexer using this instrument is obliged to infer the order of terms absent from the lists by consulting analogous entries. Italian libraries are suffering from the limits of this subject catalogue: vocabulary is inadequate, obsolete and inconsistent, the syndetic structure incomplete and inaccurate, and the syntax ill-defined, poorly explained and unable to reflect complex subjects. In the nineties, the Subject Indexing Research Group (Gruppo di ricerca sull'indicizzazione per soggetto, GRIS) of the AIB (Italian Library Association) developed the indexing theory and some principles of PRECIS and drew up guidelines based on consistent principles for vocabulary, semantic relationships and subject string construction, the latter according to role syntax (Guida 1997). In overhauling the Soggettario, the National Library in Florence aimed at a comprehensive indexing system. (A report on the method and evolution of the work has been published in Knowledge Organization (Lucarelli 2005), while the feasibility study is available in Italian (Per un nuovo Soggettario 2002). Any usable terms from the old Soggettario will be transferred to the new system, while taking into consideration international norms and interlinguistic compatibility, as well as applications outside the immediate library context. The terms will be accessible via a suitable OPAC operating on the most advanced software.
-
Milstead, J.L.: Thesauri in a full-text world (1998)
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- Date
- 22. 9.1997 19:16:05
-
Wiesenmüller, H.: Verbale Erschließung in Katalogen und Discovery-Systemen : Überlegungen zur Qualität (2021)
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- Date
- 24. 9.2021 12:22:02
-
Geißelmann, F. (Hrsg.): Sacherschließung in Online-Katalogen (1994)
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- 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]) .
