-
Chen, H.; Ng, T.: ¬An algorithmic approach to concept exploration in a large knowledge network (automatic thesaurus consultation) : symbolic branch-and-bound search versus connectionist Hopfield Net Activation (1995)
0.06
0.05899654 = product of:
0.11799308 = sum of:
0.022096837 = weight(_text_:for in 2203) [ClassicSimilarity], result of:
0.022096837 = score(doc=2203,freq=8.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.24892932 = fieldWeight in 2203, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.046875 = fieldNorm(doc=2203)
0.095896244 = weight(_text_:computing in 2203) [ClassicSimilarity], result of:
0.095896244 = score(doc=2203,freq=2.0), product of:
0.26151994 = queryWeight, product of:
5.5314693 = idf(docFreq=475, maxDocs=44218)
0.047278564 = queryNorm
0.36668807 = fieldWeight in 2203, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5314693 = idf(docFreq=475, maxDocs=44218)
0.046875 = fieldNorm(doc=2203)
0.5 = coord(2/4)
- Abstract
- Presents a framework for knowledge discovery and concept exploration. In order to enhance the concept exploration capability of knowledge based systems and to alleviate the limitation of the manual browsing approach, develops 2 spreading activation based algorithms for concept exploration in large, heterogeneous networks of concepts (eg multiple thesauri). One algorithm, which is based on the symbolic AI paradigma, performs a conventional branch-and-bound search on a semantic net representation to identify other highly relevant concepts (a serial, optimal search process). The 2nd algorithm, which is absed on the neural network approach, executes the Hopfield net parallel relaxation and convergence process to identify 'convergent' concepts for some initial queries (a parallel, heuristic search process). Tests these 2 algorithms on a large text-based knowledge network of about 13.000 nodes (terms) and 80.000 directed links in the area of computing technologies
- Source
- Journal of the American Society for Information Science. 46(1995) no.5, S.348-369
-
Chen, H.; Martinez, J.; Kirchhoff, A.; Ng, T.D.; Schatz, B.R.: Alleviating search uncertainty through concept associations : automatic indexing, co-occurence analysis, and parallel computing (1998)
0.05
0.053472333 = product of:
0.106944665 = sum of:
0.0110484185 = weight(_text_:for in 5202) [ClassicSimilarity], result of:
0.0110484185 = score(doc=5202,freq=2.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.12446466 = fieldWeight in 5202, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.046875 = fieldNorm(doc=5202)
0.095896244 = weight(_text_:computing in 5202) [ClassicSimilarity], result of:
0.095896244 = score(doc=5202,freq=2.0), product of:
0.26151994 = queryWeight, product of:
5.5314693 = idf(docFreq=475, maxDocs=44218)
0.047278564 = queryNorm
0.36668807 = fieldWeight in 5202, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5314693 = idf(docFreq=475, maxDocs=44218)
0.046875 = fieldNorm(doc=5202)
0.5 = coord(2/4)
- Source
- Journal of the American Society for Information Science. 49(1998) no.3, S.206-216
-
Byrne, C.C.; McCracken, S.A.: ¬An adaptive thesaurus employing semantic distance, relational inheritance and nominal compound interpretation for linguistic support of information retrieval (1999)
0.03
0.030265197 = product of:
0.060530394 = sum of:
0.022096837 = weight(_text_:for in 4483) [ClassicSimilarity], result of:
0.022096837 = score(doc=4483,freq=2.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.24892932 = fieldWeight in 4483, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.09375 = fieldNorm(doc=4483)
0.038433556 = product of:
0.07686711 = sum of:
0.07686711 = weight(_text_:22 in 4483) [ClassicSimilarity], result of:
0.07686711 = score(doc=4483,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.46428138 = fieldWeight in 4483, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=4483)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Date
- 15. 3.2000 10:22:37
-
Z39.19-1993: Guidelines for the construction, format, and management of monolingual thesauri (1993)
0.03
0.025568802 = product of:
0.051137604 = sum of:
0.02551523 = weight(_text_:for in 4092) [ClassicSimilarity], result of:
0.02551523 = score(doc=4092,freq=6.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.28743884 = fieldWeight in 4092, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0625 = fieldNorm(doc=4092)
0.025622372 = product of:
0.051244743 = sum of:
0.051244743 = weight(_text_:22 in 4092) [ClassicSimilarity], result of:
0.051244743 = score(doc=4092,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.30952093 = fieldWeight in 4092, 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=4092)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- This 1993 edition is the authoritative guide constructing single-language thesauri, one of the most powerful tools for information retrieval. Written by experts, Z39.19 shows how to formulate descriptors, establish relationships among terms, and present the information in print and on a screen. Also included are thesaurus maintenance procedures and recommended features for thesaurus management systems
- Footnote
- Rez. in: Knowledge organization 22(1995) no.3/4, S.180-181 (M. Hudon)
-
Dextre Clarke, S.G.: Evolution towards ISO 25964 : an international standard with guidelines for thesauri and other types of controlled vocabulary (2007)
0.02
0.024099609 = product of:
0.048199218 = sum of:
0.025779642 = weight(_text_:for in 749) [ClassicSimilarity], result of:
0.025779642 = score(doc=749,freq=8.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.29041752 = fieldWeight in 749, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0546875 = fieldNorm(doc=749)
0.022419576 = product of:
0.04483915 = sum of:
0.04483915 = weight(_text_:22 in 749) [ClassicSimilarity], result of:
0.04483915 = score(doc=749,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.2708308 = fieldWeight in 749, 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=749)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- Die geschichtliche Entwicklung von ISO 2788: Documentation - Guidelines for the establishment and development of monolingual thesauri und ISO 5964: Documentation - Guidelines for the establishment and development of multilingual thesauri wird kurz beschrieben. 2001 begann die Arbeit an der Entwicklung von BS 8723: Structured Vocabularies for Information Retrieval - Guide, einer fünfteiligen Norm, die konzipiert wurde, um die internationalen Normen zu aktualisieren, insbesondere mit Hinblick auf Interoperabilität. Der Verfahrensablauf zur Übernahme von BS 8723 als internationale Norm hat begonnen.
- Date
- 8.12.2007 19:25:22
-
Dupuis, P.; Lapointe, J.: Developpement d'un outil documentaire à Hydro-Quebec : le Thesaurus HQ (1997)
0.02
0.023227734 = product of:
0.04645547 = sum of:
0.020833097 = weight(_text_:for in 3173) [ClassicSimilarity], result of:
0.020833097 = score(doc=3173,freq=4.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.23469281 = fieldWeight in 3173, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0625 = fieldNorm(doc=3173)
0.025622372 = product of:
0.051244743 = sum of:
0.051244743 = weight(_text_:22 in 3173) [ClassicSimilarity], result of:
0.051244743 = score(doc=3173,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.30952093 = fieldWeight in 3173, 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=3173)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- Describes the backgroud to the construction of a thesaurus at Hydro-Quebec, Quebec, Canada. Several information units, linked to form a network, share the same bibliographic database. The need for coherence and efficiency was the principle motive for the construction of the multidisciplinary thesaurus. Describes the construction process, discusses the specifity of the tool, its circulation, and considers its use on a partnership basis with other information services
- Source
- Argus. 26(1997) no.3, S.16-22
-
Lambert, N.: Of thesauri and computers : reflections on the need for thesauri (1995)
0.02
0.023227734 = product of:
0.04645547 = sum of:
0.020833097 = weight(_text_:for in 3734) [ClassicSimilarity], result of:
0.020833097 = score(doc=3734,freq=4.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.23469281 = fieldWeight in 3734, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0625 = fieldNorm(doc=3734)
0.025622372 = product of:
0.051244743 = sum of:
0.051244743 = weight(_text_:22 in 3734) [ClassicSimilarity], result of:
0.051244743 = score(doc=3734,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = 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(1/2)
0.5 = coord(2/4)
- 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
-
Heinzelin, D. de; ¬d'¬Hautcourt, F.; Pols, R.: ¬Un nouveaux thesaurus multilingue informatise relatif aux instruments de musique (1998)
0.02
0.023227734 = product of:
0.04645547 = sum of:
0.020833097 = weight(_text_:for in 932) [ClassicSimilarity], result of:
0.020833097 = score(doc=932,freq=4.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.23469281 = fieldWeight in 932, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0625 = fieldNorm(doc=932)
0.025622372 = product of:
0.051244743 = sum of:
0.051244743 = weight(_text_:22 in 932) [ClassicSimilarity], result of:
0.051244743 = score(doc=932,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.30952093 = fieldWeight in 932, 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=932)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- Describes the development and structure of a multilingual thesaurus for classifying and defining musical instruments, designed at the Brussels Theatre de la Monnaie as part of a project to create a multimedia database of theatre and musical arts
- Date
- 1. 8.1996 22:01:00
- Footnote
- Übers. d. Titels: A new multilingual thesaurus for musical instruments
-
Berti, Jr., D.W.; Lima, G.; Maculan, B.; Soergel, D.: Computer-assisted checking of conceptual relationships in a large thesaurus (2018)
0.02
0.023227734 = product of:
0.04645547 = sum of:
0.020833097 = weight(_text_:for in 4721) [ClassicSimilarity], result of:
0.020833097 = score(doc=4721,freq=4.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.23469281 = fieldWeight in 4721, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0625 = fieldNorm(doc=4721)
0.025622372 = product of:
0.051244743 = sum of:
0.051244743 = weight(_text_:22 in 4721) [ClassicSimilarity], result of:
0.051244743 = score(doc=4721,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.30952093 = fieldWeight in 4721, 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=4721)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Date
- 17. 1.2019 19:04:22
- Source
- Challenges and opportunities for knowledge organization in the digital age: proceedings of the Fifteenth International ISKO Conference, 9-11 July 2018, Porto, Portugal / organized by: International Society for Knowledge Organization (ISKO), ISKO Spain and Portugal Chapter, University of Porto - Faculty of Arts and Humanities, Research Centre in Communication, Information and Digital Culture (CIC.digital) - Porto. Eds.: F. Ribeiro u. M.E. Cerveira
-
Eastman, C.M.: Overlaps in postings to thesaurus terms : a preliminary study (1988)
0.02
0.0223727 = product of:
0.0447454 = sum of:
0.022325827 = weight(_text_:for in 3555) [ClassicSimilarity], result of:
0.022325827 = score(doc=3555,freq=6.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.25150898 = fieldWeight in 3555, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0546875 = fieldNorm(doc=3555)
0.022419576 = product of:
0.04483915 = sum of:
0.04483915 = weight(_text_:22 in 3555) [ClassicSimilarity], result of:
0.04483915 = score(doc=3555,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.2708308 = fieldWeight in 3555, 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=3555)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- The patterns of overlap between terms which are closely related in a thesaurus are considered. The relationships considered are parent/child, in which one term is a broader term of the other, and sibling in which to 2 terms share the same broader term. The patterns of overlap observed in the MeSH thesaurus with respect to selected MEDLINE postings are examined. The implications of the overlap patterns are discussed, in particular, the impact of the overlap patterns on the potential effectiveness of a proposed algorithm for handling negation is considered.
- Date
- 25.12.1995 22:52:34
- Source
- ASIS'88. Information technology: planning for the next fifty years. Proceedings of the 51st Annual Meeting of the Americal Society for Information Science, Atlanta, Georgia, 23.-27.10.1988. Vol.25. Ed. by C.L. Borgman and E.Y.H. Pai
-
Dextre Clarke, S.G.: Thesaural relationships (2001)
0.02
0.0223727 = product of:
0.0447454 = sum of:
0.022325827 = weight(_text_:for in 1149) [ClassicSimilarity], result of:
0.022325827 = score(doc=1149,freq=6.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.25150898 = fieldWeight in 1149, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0546875 = fieldNorm(doc=1149)
0.022419576 = product of:
0.04483915 = sum of:
0.04483915 = weight(_text_:22 in 1149) [ClassicSimilarity], result of:
0.04483915 = score(doc=1149,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.2708308 = fieldWeight in 1149, 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=1149)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- A thesaurus in the controlled vocabulary environment is a tool designed to support effective infonnation retrieval (IR) by guiding indexers and searchers consistently to choose the same terms for expressing a given concept or combination of concepts. Terms in the thesaurus are linked by relationships of three well-known types: equivalence, hierarchical, and associative. The functions and properties of these three basic types and some subcategories are described, as well as some additional relationship types conunonly found in thesauri. Progressive automation of IR processes and the capability for simultaneous searching of vast networked resources are creating some pressures for change in the categorization and consistency of relationships.
- Date
- 22. 9.2007 15:45:57
-
Schmitz-Esser, W.: Thesaurus and beyond : an advanced formula for linguistic engineering and information retrieval (1999)
0.02
0.020656807 = product of:
0.041313615 = sum of:
0.022096837 = weight(_text_:for in 4116) [ClassicSimilarity], result of:
0.022096837 = score(doc=4116,freq=8.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.24892932 = fieldWeight in 4116, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.046875 = fieldNorm(doc=4116)
0.019216778 = product of:
0.038433556 = sum of:
0.038433556 = weight(_text_:22 in 4116) [ClassicSimilarity], result of:
0.038433556 = score(doc=4116,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.23214069 = fieldWeight in 4116, 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=4116)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- This paper describes a proposal for a new approach to thesaurus design and construction that could have significant implicantions for change in the way multilingual thesauri are handled and integrated with each other. The formula presented here has its origin in the work of the German Thesaurus Committee and has had input from a number of scientists and practitioners int he field. The emphasis is on the various types of relationships found among concepts, notiions and universals in languages. These relationships are analysed and refined beyond the approach taken in existing thesauri. This proposal is very much at the discussion stage and the author invites the assistance of interested readers through criticisms, discussion and dialogue. Applications of the proposed thesaurus are included and the major goal of this proposal is to provide the basis for improved desing and integration of multilingual thesauri
- Source
- Knowledge organization. 26(1999) no.1, S.10-22
-
Busch, J.A.: Building and accessing vocabulary resources for networked resource discovery and navigation (1998)
0.02
0.020324267 = product of:
0.040648535 = sum of:
0.01822896 = weight(_text_:for in 2346) [ClassicSimilarity], result of:
0.01822896 = score(doc=2346,freq=4.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.20535621 = fieldWeight in 2346, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0546875 = fieldNorm(doc=2346)
0.022419576 = product of:
0.04483915 = sum of:
0.04483915 = weight(_text_:22 in 2346) [ClassicSimilarity], result of:
0.04483915 = score(doc=2346,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.2708308 = fieldWeight in 2346, 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=2346)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Date
- 22. 9.1997 19:16:05
- 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
-
Milstead, J.L.: Thesauri in a full-text world (1998)
0.02
0.020186728 = product of:
0.040373456 = sum of:
0.024359472 = weight(_text_:for in 2337) [ClassicSimilarity], result of:
0.024359472 = score(doc=2337,freq=14.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.27441877 = fieldWeight in 2337, product of:
3.7416575 = tf(freq=14.0), with freq of:
14.0 = termFreq=14.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.016013984 = product of:
0.032027967 = sum of:
0.032027967 = weight(_text_:22 in 2337) [ClassicSimilarity], result of:
0.032027967 = score(doc=2337,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = 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)
0.5 = coord(2/4)
- 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
- 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
-
Curras, E.: Ontologies, taxonomy and thesauri in information organisation and retrieval (2010)
0.02
0.019978384 = product of:
0.079913534 = sum of:
0.079913534 = weight(_text_:computing in 3276) [ClassicSimilarity], result of:
0.079913534 = score(doc=3276,freq=2.0), product of:
0.26151994 = queryWeight, product of:
5.5314693 = idf(docFreq=475, maxDocs=44218)
0.047278564 = queryNorm
0.3055734 = fieldWeight in 3276, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5314693 = idf(docFreq=475, maxDocs=44218)
0.0390625 = fieldNorm(doc=3276)
0.25 = coord(1/4)
- Content
- Inhalt: 1. From classifications to ontologies Knowledge - A new concept of knowledge - Knowledge and information - Knowledge organisation - Knowledge organisation and representation - Cognitive sciences - Talent management - Learning systematisation - Historical evolution - From classification to knowledge organisation - Why ontologies exist - Ontologies - The structure of ontologies 2. Taxonomies and thesauri From ordering to taxonomy - The origins of taxonomy - Hierarchical and horizontal order - Correlation with classifications - Taxonomy in computer science - Computing taxonomy - Definitions - Virtual taxonomy, cybernetic taxonomy - Taxonomy in Information Science - Similarities between taxonomies and thesauri - ifferences between taxonomies and thesauri 3. Thesauri Terminology in classification systems - Terminological languages - Thesauri - Thesauri definitions - Conditions that a thesaurus must fulfil - Historical evolution - Classes of thesauri 4. Thesauri in (cladist) systematics Systematics - Systematics as a noun - Definitions and historic evolution over time - Differences between taxonomy and systematics - Systematics in thesaurus construction theory - Classic, numerical and cladist systematics - Classic systematics in information science - Numerical systematics in information science - Thesauri in cladist systematics - Systematics in information technology - Some examples 5. Thesauri in systems theory Historical evolution - Approach to systems - Systems theory applied to the construction of thesauri - Components - Classes of system - Peculiarities of these systems - Working methods - Systems theory applied to ontologies and taxonomies
-
Aitchison, J.; Dextre Clarke, S.G.: ¬The Thesaurus : a historical viewpoint, with a look to the future (2004)
0.02
0.0191766 = product of:
0.0383532 = sum of:
0.019136423 = weight(_text_:for in 5005) [ClassicSimilarity], result of:
0.019136423 = score(doc=5005,freq=6.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.21557912 = fieldWeight in 5005, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.046875 = fieldNorm(doc=5005)
0.019216778 = product of:
0.038433556 = sum of:
0.038433556 = weight(_text_:22 in 5005) [ClassicSimilarity], result of:
0.038433556 = score(doc=5005,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.23214069 = fieldWeight in 5005, 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=5005)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- After a period of experiment and evolution in the 1950s and 1960s, a fairly standard format for thesauri was established with the publication of the influential Thesaurus of Engineering and Scientific Terms (TEST) in 1967. This and other early thesauri relied primarily an the presentation of terms in alphabetical order. The value of a classified presentation was subsequently realised, and in particular the technique of facet analysis has profoundly influenced thesaurus evolution. Thesaurofacet and the Art & Architecture Thesaurus have acted as models for two distinct breeds of thesaurus using faceted displays of terms. As of the 1990s, the expansion of end-user access to vast networked resources is imposing further requirements an the style and structure of controlled vocabularies. The international standards for thesauri, first conceived in a print-based era, are badly in need of updating. Work is in hand in the UK and the USA to revise and develop standards in support of electronic thesauri.
- Date
- 22. 9.2007 15:46:13
-
Bagheri, M.: Development of thesauri in Iran (2006)
0.02
0.0191766 = product of:
0.0383532 = sum of:
0.019136423 = weight(_text_:for in 260) [ClassicSimilarity], result of:
0.019136423 = score(doc=260,freq=6.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.21557912 = fieldWeight in 260, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.046875 = fieldNorm(doc=260)
0.019216778 = product of:
0.038433556 = sum of:
0.038433556 = weight(_text_:22 in 260) [ClassicSimilarity], result of:
0.038433556 = score(doc=260,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.23214069 = fieldWeight in 260, 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=260)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- The need for Persian thesauri became apparent during the late 1960s with the advent of documentation centres in Iran. The first Persian controlled vocabulary was published by IRANDOC in 1977. Other centres worked on translations of existing thesauri, but it was soon realised that these efforts did not meet the needs of the centres. After the Islamic revolution in 1979, the foundation of new centres intensified the need for Persian thesauri, especially in the fields of history and government documents. Also, during the Iran-Iraq war, Iranian research centres produced reports in scientific and technical fields, both to support military requirements and to meet society's needs. In order to provide a comprehensive thesaurus, the Council of Scientific Research of Iran approved a project for the compilation of such a work. Nowadays, 12 Persian thesauri are available and others are being prepared, based on the literary corpus and conformity with characteristics of Iranian culture.
- Source
- Indexer. 25(2006) no.1, S.19-22
-
Cheti, A.; Viti, E.: Functionality and merits of a faceted thesaurus : the case of the Nuovo soggettario (2023)
0.02
0.0191766 = product of:
0.0383532 = sum of:
0.019136423 = weight(_text_:for in 1181) [ClassicSimilarity], result of:
0.019136423 = score(doc=1181,freq=6.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.21557912 = fieldWeight in 1181, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.046875 = fieldNorm(doc=1181)
0.019216778 = product of:
0.038433556 = sum of:
0.038433556 = weight(_text_:22 in 1181) [ClassicSimilarity], result of:
0.038433556 = score(doc=1181,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.23214069 = fieldWeight in 1181, 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=1181)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- The Nuovo soggettario, the official Italian subject indexing system edited by the National Central Library of Florence, is made up of interactive components, the core of which is a general thesaurus and some rules of a conventional syntax for subject string construction. The Nuovo soggettario Thesaurus is in compliance with ISO 25964: 2011-2013, IFLA LRM, and FAIR principle (findability, accessibility, interoperability, and reusability). Its open data are available in the Zthes, MARC21, and in SKOS formats and allow for interoperability with l library, archive, and museum databases. The Thesaurus's macrostructure is organized into four fundamental macro-categories, thirteen categories, and facets. The facets allow for the orderly development of hierarchies, thereby limiting polyhierarchies and promoting the grouping of homogenous concepts. This paper addresses the main features and peculiarities which have characterized the consistent development of this categorical structure and its effects on the syntactic sphere in a predominantly pre-coordinated usage context.
- Date
- 26.11.2023 18:59:22
-
Nielsen, M.L.: Thesaurus construction : key issues and selected readings (2004)
0.02
0.017654698 = product of:
0.035309397 = sum of:
0.012889821 = weight(_text_:for in 5006) [ClassicSimilarity], result of:
0.012889821 = score(doc=5006,freq=2.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.14520876 = fieldWeight in 5006, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.0546875 = fieldNorm(doc=5006)
0.022419576 = product of:
0.04483915 = sum of:
0.04483915 = weight(_text_:22 in 5006) [ClassicSimilarity], result of:
0.04483915 = score(doc=5006,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.2708308 = fieldWeight in 5006, 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=5006)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- The purpose of this selected bibliography is to introduce issues and problems in relation to thesaurus construction and to present a set of readings that may be used in practical thesaurus design. The concept of thesaurus is discussed, the purpose of the thesaurus and how the concept has evolved over the years according to new IR technologies. Different approaches to thesaurus construction are introduced, and readings dealing with specific problems and developments in the collection, formation and organisation of thesaurus concepts and terms are presented. Primarily manual construction methods are discussed, but the bibliography also refers to research about techniques for automatic thesaurus construction.
- Date
- 18. 5.2006 20:06:22
-
Mooers, C.N.: ¬The indexing language of an information retrieval system (1985)
0.02
0.015795194 = product of:
0.031590387 = sum of:
0.020380598 = weight(_text_:for in 3644) [ClassicSimilarity], result of:
0.020380598 = score(doc=3644,freq=20.0), product of:
0.08876751 = queryWeight, product of:
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.047278564 = queryNorm
0.22959523 = fieldWeight in 3644, product of:
4.472136 = tf(freq=20.0), with freq of:
20.0 = termFreq=20.0
1.8775425 = idf(docFreq=18385, maxDocs=44218)
0.02734375 = fieldNorm(doc=3644)
0.011209788 = product of:
0.022419576 = sum of:
0.022419576 = weight(_text_:22 in 3644) [ClassicSimilarity], result of:
0.022419576 = score(doc=3644,freq=2.0), product of:
0.16556148 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.047278564 = queryNorm
0.1354154 = fieldWeight in 3644, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02734375 = fieldNorm(doc=3644)
0.5 = coord(1/2)
0.5 = coord(2/4)
- Abstract
- Calvin Mooers' work toward the resolution of the problem of ambiguity in indexing went unrecognized for years. At the time he introduced the "descriptor" - a term with a very distinct meaning-indexers were, for the most part, taking index terms directly from the document, without either rationalizing them with context or normalizing them with some kind of classification. It is ironic that Mooers' term came to be attached to the popular but unsophisticated indexing methods which he was trying to root out. Simply expressed, what Mooers did was to take the dictionary definitions of terms and redefine them so clearly that they could not be used in any context except that provided by the new definition. He did, at great pains, construct such meanings for over four hundred words; disambiguation and specificity were sought after and found for these words. He proposed that all indexers adopt this method so that when the index supplied a term, it also supplied the exact meaning for that term as used in the indexed document. The same term used differently in another document would be defined differently and possibly renamed to avoid ambiguity. The disambiguation was achieved by using unabridged dictionaries and other sources of defining terminology. In practice, this tends to produce circularity in definition, that is, word A refers to word B which refers to word C which refers to word A. It was necessary, therefore, to break this chain by creating a new, definitive meaning for each word. Eventually, means such as those used by Austin (q.v.) for PRECIS achieved the same purpose, but by much more complex means than just creating a unique definition of each term. Mooers, however, was probably the first to realize how confusing undefined terminology could be. Early automatic indexers dealt with distinct disciplines and, as long as they did not stray beyond disciplinary boundaries, a quick and dirty keyword approach was satisfactory. The trouble came when attempts were made to make a combined index for two or more distinct disciplines. A number of processes have since been developed, mostly involving tagging of some kind or use of strings. Mooers' solution has rarely been considered seriously and probably would be extremely difficult to apply now because of so much interdisciplinarity. But for a specific, weIl defined field, it is still weIl worth considering. Mooers received training in mathematics and physics from the University of Minnesota and the Massachusetts Institute of Technology. He was the founder of Zator Company, which developed and marketed a coded card information retrieval system, and of Rockford Research, Inc., which engages in research in information science. He is the inventor of the TRAC computer language.
- Footnote
- Original in: Information retrieval today: papers presented at an Institute conducted by the Library School and the Center for Continuation Study, University of Minnesota, Sept. 19-22, 1962. Ed. by Wesley Simonton. Minneapolis, Minn.: The Center, 1963. S.21-36.
