-
Dykstra, M.: PRECIS: a primer (1985)
0.18
0.18079904 = product of:
0.30133173 = sum of:
0.09683614 = weight(_text_:context in 664) [ClassicSimilarity], result of:
0.09683614 = score(doc=664,freq=2.0), product of:
0.17622331 = queryWeight, product of:
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.04251826 = queryNorm
0.54950815 = fieldWeight in 664, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.09375 = fieldNorm(doc=664)
0.107641 = weight(_text_:index in 664) [ClassicSimilarity], result of:
0.107641 = score(doc=664,freq=2.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.5793543 = fieldWeight in 664, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.09375 = fieldNorm(doc=664)
0.09685459 = weight(_text_:system in 664) [ClassicSimilarity], result of:
0.09685459 = score(doc=664,freq=6.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.72326225 = fieldWeight in 664, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.09375 = fieldNorm(doc=664)
0.6 = coord(3/5)
- LCSH
- PRECIS (Indexing system)
- Subject
- PRECIS (Indexing system)
- Theme
- Preserved Context Index System (PRECIS)
-
Austin, D.: PRECIS: Introduction (1987)
0.16
0.15623769 = product of:
0.26039615 = sum of:
0.09683614 = weight(_text_:context in 805) [ClassicSimilarity], result of:
0.09683614 = score(doc=805,freq=2.0), product of:
0.17622331 = queryWeight, product of:
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.04251826 = queryNorm
0.54950815 = fieldWeight in 805, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.09375 = fieldNorm(doc=805)
0.107641 = weight(_text_:index in 805) [ClassicSimilarity], result of:
0.107641 = score(doc=805,freq=2.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.5793543 = fieldWeight in 805, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.09375 = fieldNorm(doc=805)
0.055919025 = weight(_text_:system in 805) [ClassicSimilarity], result of:
0.055919025 = score(doc=805,freq=2.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.41757566 = fieldWeight in 805, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.09375 = fieldNorm(doc=805)
0.6 = coord(3/5)
- Theme
- Preserved Context Index System (PRECIS)
-
Austin, D.; Digger, J.A.: PRECIS: The Preserved Context Index System (1985)
0.11
0.11030447 = product of:
0.18384077 = sum of:
0.059299782 = weight(_text_:context in 3652) [ClassicSimilarity], result of:
0.059299782 = score(doc=3652,freq=12.0), product of:
0.17622331 = queryWeight, product of:
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.04251826 = queryNorm
0.33650362 = fieldWeight in 3652, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.0234375 = fieldNorm(doc=3652)
0.07611368 = weight(_text_:index in 3652) [ClassicSimilarity], result of:
0.07611368 = score(doc=3652,freq=16.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.40966535 = fieldWeight in 3652, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.0234375 = fieldNorm(doc=3652)
0.048427295 = weight(_text_:system in 3652) [ClassicSimilarity], result of:
0.048427295 = score(doc=3652,freq=24.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.36163113 = fieldWeight in 3652, product of:
4.8989797 = tf(freq=24.0), with freq of:
24.0 = termFreq=24.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0234375 = fieldNorm(doc=3652)
0.6 = coord(3/5)
- Abstract
- Probably the most interesting, original and controversial indexing system of the 1970s has been PRECIS (the Preserved Context Index System) developed by Derek Austin. It attracted such attention that the short courses given at the British National Bibliography offices in London -initiated as a means of teaching the staff of BNB who did subject indexing-were repeated all over the world, in the form of three-day or three-week sessions. A few fortunate non-BNB indexers were taken into London classes, taught by Austin and Digger, and had the advantage of a week's work with the regular staff theresomething that could not be done elsewhere. In addition, descriptions of the system were published from time to time as progress was made an the system itself and clarification or updating were needed. This article has been selected as an example of clarification. A second edition of the original 1974 Manual describing PRECIS appeared in early 1984, so the system may now be regarded as fully mature. PRECIS, which is the culmination of Austin's research for the Classification Research Group plus considerable additional input from the science of linguistics, is a highly sophisticated indexing system, deliberately created to be used with a computer. The motive behind it was that the indexer should do the brain work and the computer the nitty-gritty work of manipulating index terms. Chosen combinations and permutations are used as head words under strict rules to ensure that the context which defines the specific meaning of these words is always present, thus avoiding the ambiguity problem in indexing. The system also has classifi ation features, in part drawn from the Group's long interest in faceted classification. The actual index produces a large number of index entries, each carrying with it the basic context of the item being described. A weIl-defined terminology, in addition to contextdependency, is a feature of PRECIS. Role operators define the types of terms used and control the manipulations of the terms, which are originally entered as a string. The indexer is able to analyze and reduce to string form any document, process, or material that can be described in words, making it ideal for most audiovisual material.
The system itself has two major aspects: - a syntactic approach in which relationships between terms are identified and tagged. Suitable algorithms for manipulation produce a very thorough index in which each head word is kept in context. - a semantic approach in which terminology is weIl defined by ensuring that the relationships of equivalence, hierarchy, and association are clearly established. Charts of relationships are created by inductive means (i.e., from the ground up). A special code for computer manipulation is used with each line of the string. This translates the string format into one that, with specially derived algorithms, can be used by the computer, to produce the actual index headings with all parts rotated by following the algorithm. The PRECIS system has been translated and utilized for languages other than English, notably French, German, and Danish. Modifications needed for idiosyncracies of each language have been made. Some, such as those modifications needed for German, have turned out to have usefulness with English as weIl. All in all, the system has such advanced indexing concepts that it provides a kind of indexing not possible before the computer came into common usage. Austin, who joined the staff of the British National Bibliography in 1963, is currently a member of the British Library staff. His early work included a NATO-sponsored research assignment for the Classification Research Group (q.v.). This, in turn, led to the development of PRECIS.
- Theme
- Preserved Context Index System (PRECIS)
-
Kanjilal, A.: Permuted keyword index using CDS/ISIS : a tutorial (1992)
0.06
0.058114816 = product of:
0.14528704 = sum of:
0.05648775 = weight(_text_:context in 5810) [ClassicSimilarity], result of:
0.05648775 = score(doc=5810,freq=2.0), product of:
0.17622331 = queryWeight, product of:
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.04251826 = queryNorm
0.32054642 = fieldWeight in 5810, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.0546875 = fieldNorm(doc=5810)
0.08879929 = weight(_text_:index in 5810) [ClassicSimilarity], result of:
0.08879929 = score(doc=5810,freq=4.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.4779429 = fieldWeight in 5810, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.0546875 = fieldNorm(doc=5810)
0.4 = coord(2/5)
- Abstract
- Describes a utility program designed to generate a permuted keyword index from a CDS/ISIS database. The different keywords which are used to describe the subject content of documents are presented together in a string, thus showing the context in which the lead term is used. Indexes can also be generated for any repeatable field, such as author and report number. The string is rotated from left to right to provide an access from each of the terms used. Pascal is the language used and a step by step tutorial is given to create the necessary databases
-
Devadason, F.J.: Computerization of Deep Structure Based Indexes (1985)
0.05
0.053972054 = product of:
0.13493013 = sum of:
0.08879929 = weight(_text_:index in 1636) [ClassicSimilarity], result of:
0.08879929 = score(doc=1636,freq=4.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.4779429 = fieldWeight in 1636, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.0546875 = fieldNorm(doc=1636)
0.04613084 = weight(_text_:system in 1636) [ClassicSimilarity], result of:
0.04613084 = score(doc=1636,freq=4.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.34448233 = fieldWeight in 1636, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0546875 = fieldNorm(doc=1636)
0.4 = coord(2/5)
- Abstract
- The Deep Structure Indexing System is based on: (1) a set of postulated elementary categories of the elements fit to form componentes of names of subjects; (2) a set of syntax rules with reference to the categories; (3) a vocabulary control tool such as Classaurus; (4) a set of indicator digits to denote the categories and their subdivisions; and (5) a set of codes to denote a few of the decisions of the indexer. Names of subjects formulated on the basis mentioned above are input to a set of computer programs to generate several different types of subject index entires. This paper describes briefly the Deep Structure Index System
-
Cheti, A.; Viti, E.: Functionality and merits of a faceted thesaurus : the case of the Nuovo soggettario (2023)
0.05
0.05273932 = product of:
0.08789886 = sum of:
0.04841807 = weight(_text_:context in 1181) [ClassicSimilarity], result of:
0.04841807 = score(doc=1181,freq=2.0), product of:
0.17622331 = queryWeight, product of:
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.04251826 = queryNorm
0.27475408 = fieldWeight in 1181, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.14465 = idf(docFreq=1904, maxDocs=44218)
0.046875 = fieldNorm(doc=1181)
0.027959513 = weight(_text_:system in 1181) [ClassicSimilarity], result of:
0.027959513 = score(doc=1181,freq=2.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.20878783 = fieldWeight in 1181, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=1181)
0.011521274 = product of:
0.03456382 = sum of:
0.03456382 = weight(_text_:22 in 1181) [ClassicSimilarity], result of:
0.03456382 = score(doc=1181,freq=2.0), product of:
0.1488917 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04251826 = 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)
0.33333334 = coord(1/3)
0.6 = coord(3/5)
- 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
-
Biswas, S.C.; Smith, F.: Efficiency and effectiveness of deep structure based indexing languages : PRECIS vs. DSIS (1991)
0.05
0.049060576 = product of:
0.122651435 = sum of:
0.08970083 = weight(_text_:index in 2187) [ClassicSimilarity], result of:
0.08970083 = score(doc=2187,freq=8.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.48279524 = fieldWeight in 2187, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.0390625 = fieldNorm(doc=2187)
0.032950602 = weight(_text_:system in 2187) [ClassicSimilarity], result of:
0.032950602 = score(doc=2187,freq=4.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.24605882 = fieldWeight in 2187, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0390625 = fieldNorm(doc=2187)
0.4 = coord(2/5)
- Abstract
- A subject indexing language (SIL) is an artificial language used for formulating names of subjects and is composed of (a) a vocabulary, (b) a list of elementary categories, and (c) the rules of syntax. A string indexing language is an SIL, whose expressions are multiple overlappimg index entries, constructed accordingly to explicit syntax rules. PRECIS, developed by Austin, and POPSI, developed by Bhattacharyya, are two such string indexing languages. DSIS is a more versatile version of the POPSI system, developed by Devadason. There have been several attempts to compare and evaluate the superiority of one system over another, with the exception that none of these tried to compare their performances from the searcher's point of view. This present study tries to compare the efficiency and effectiveness of printed subject indexes produced by PRECIS and DSIS on a non-empirical basis and based on the following five major characteristics of index entries identified by Craven as desirable from the searcher's viewpoint: (1) predicitibility, (2) collocation, (3) clarity, (4) succinctness, and (5) eliminability. A representative sample of 600 documents (both macro and micro), chosen from three different social science subject fields, has been used as the test data. The main points of discussion are (a) the term structure, (b) the term relationships, and (c) the entry structure, generated by the two systems. On the whole, a PRECIS index performs better than a DSIS index in terms of most of the above characteristics. It has been concluded that the user will search the former more efficiently and effectively than the latter
-
MacEwan, A.: Crossing language barriers in Europe : Linking LCSH to other subject heading languages (2000)
0.04
0.040885318 = product of:
0.10221329 = sum of:
0.055919025 = weight(_text_:system in 5618) [ClassicSimilarity], result of:
0.055919025 = score(doc=5618,freq=8.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.41757566 = fieldWeight in 5618, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=5618)
0.046294264 = product of:
0.06944139 = sum of:
0.034877572 = weight(_text_:29 in 5618) [ClassicSimilarity], result of:
0.034877572 = score(doc=5618,freq=2.0), product of:
0.14956595 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.04251826 = queryNorm
0.23319192 = fieldWeight in 5618, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=5618)
0.03456382 = weight(_text_:22 in 5618) [ClassicSimilarity], result of:
0.03456382 = score(doc=5618,freq=2.0), product of:
0.1488917 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04251826 = queryNorm
0.23214069 = fieldWeight in 5618, 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=5618)
0.6666667 = coord(2/3)
0.4 = coord(2/5)
- Abstract
- A study group representing four European national libraries (the Swiss National Library, Die Deutsche Bibliothek, the Bibliothèque nationale de France and The British Library) recently conducted a study on the possibility of establishing multilingual thesaural links between the headings in the LCSH authority file and the authority files of the German indexing system SWD/RSWK and the French indexing system RAMEAU. The study demonstrated a high level of correspondence in main headings, but also revealed a number of issues requiring further investigation. The study group's findings led to recommendations on the scope for the development of a prototype system for linking the three Subject Heading Languages (SHLs) in the databases of the four institutions
- Date
- 27. 5.2001 16:22:10
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Source
- The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T.Stone
-
MacEwan, A.: LCSH and the British Library : an international subject authority database? (1996)
0.04
0.038164005 = product of:
0.09541001 = sum of:
0.06279058 = weight(_text_:index in 7412) [ClassicSimilarity], result of:
0.06279058 = score(doc=7412,freq=2.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.33795667 = fieldWeight in 7412, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.0546875 = fieldNorm(doc=7412)
0.03261943 = weight(_text_:system in 7412) [ClassicSimilarity], result of:
0.03261943 = score(doc=7412,freq=2.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.2435858 = fieldWeight in 7412, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0546875 = fieldNorm(doc=7412)
0.4 = coord(2/5)
- Abstract
- The LCSH system is still an important part of the future for subject access to catalogues of bibliographic records. The British Library has decided to reinstate LCSH to records created for the BNB, because of the economic necessity of cooperation and because it provides an available common standard. Outlines development plans for the LCSH, and the British Library's involvement through its participation in the Subject Authorities Cooperative programme. It will also be involved in: training in the application of LCSH, and indexing of works of literature and fiction. The cooperative trend is now towards the creation of an international subject authority database
- Source
- Catalogue and index. 1996, no.120, S.1-6
-
Ganendran, J.: Learn Library of Confress subject access (2000)
0.04
0.038164005 = product of:
0.09541001 = sum of:
0.06279058 = weight(_text_:index in 1368) [ClassicSimilarity], result of:
0.06279058 = score(doc=1368,freq=2.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.33795667 = fieldWeight in 1368, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.0546875 = fieldNorm(doc=1368)
0.03261943 = weight(_text_:system in 1368) [ClassicSimilarity], result of:
0.03261943 = score(doc=1368,freq=2.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.2435858 = fieldWeight in 1368, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0546875 = fieldNorm(doc=1368)
0.4 = coord(2/5)
- Abstract
- This book provides the necessary skills for a cataloger in a library or other information agency, whether a professional or paraprofessional level. It is also suitable for university students studying librarianship and those independently learning subject cataloging. Reviews the various parts of the LCSH cataloging system and contains use practice exercises and tests. A glossary, bibliography and index complete this fourth study guide in the library basics series
-
Chan, L.M.; Hodges, T.: Entering the millennium : a new century for LCSH (2000)
0.03
0.034333993 = product of:
0.08583498 = sum of:
0.03954072 = weight(_text_:system in 5920) [ClassicSimilarity], result of:
0.03954072 = score(doc=5920,freq=4.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.29527056 = fieldWeight in 5920, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=5920)
0.046294264 = product of:
0.06944139 = sum of:
0.034877572 = weight(_text_:29 in 5920) [ClassicSimilarity], result of:
0.034877572 = score(doc=5920,freq=2.0), product of:
0.14956595 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.04251826 = queryNorm
0.23319192 = fieldWeight in 5920, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=5920)
0.03456382 = weight(_text_:22 in 5920) [ClassicSimilarity], result of:
0.03456382 = score(doc=5920,freq=2.0), product of:
0.1488917 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04251826 = 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)
0.6666667 = coord(2/3)
0.4 = coord(2/5)
- 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
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Source
- The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T.Stone
-
Da Silva, A.M.; Azevedo, L.M. de; Nogueira, M.D.L.R.: ¬A aplicacao do SIPORbase : uma proposta de indexacao do manuscrito e do livro antigo (1995)
0.02
0.024021262 = product of:
0.060053155 = sum of:
0.048427295 = weight(_text_:system in 1639) [ClassicSimilarity], result of:
0.048427295 = score(doc=1639,freq=6.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.36163113 = fieldWeight in 1639, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=1639)
0.011625858 = product of:
0.034877572 = sum of:
0.034877572 = weight(_text_:29 in 1639) [ClassicSimilarity], result of:
0.034877572 = score(doc=1639,freq=2.0), product of:
0.14956595 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.04251826 = queryNorm
0.23319192 = fieldWeight in 1639, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=1639)
0.33333334 = coord(1/3)
0.4 = coord(2/5)
- Abstract
- SIPORbase, the System for Indexing in Portuguese, was developed by the National Library of Portugal, based on the LCSH. In contrast to the Brunet-Parguez system used in France, SIPORbase is a coextensive indexing language. Its initial application in 1989 to current bibliography has been extended to the collection of codices. Experience with manuscripts only indicates a high degree of relevance in retrieval, from the several hundred subject headings created so far
- Content
- Revised version of a presentation given at a LIBER workshop on The Brunet-Parguez system for subject indexing of ancient books, held in Toulouse in Feb 1994
- Date
- 29. 7.1998 13:16:16
-
Mineur, B.W.: Relations in chains (1973)
0.02
0.021751298 = product of:
0.10875649 = sum of:
0.10875649 = weight(_text_:index in 7927) [ClassicSimilarity], result of:
0.10875649 = score(doc=7927,freq=6.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.5853582 = fieldWeight in 7927, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.0546875 = fieldNorm(doc=7927)
0.2 = coord(1/5)
- Abstract
- The criticisms made against chain indexing are reviewed, and PRECIS briefly considered as a possible (but improbable) general substitute for indexing. The failures of chain indexing arise mainly from an inherited overemphasis on generic relationships, encouraged by careless use of the term 'chain'. The use of symbols to represent relations between terms is suggested for the chain index, to emphasize syntagmatic relations and prevent ambiguity. These relationships can be used to manipulate the index terms into likely additional index approaches, employing the logical concepts of symmetry and transitivity which derive from a structure inherent between relations, a sort of 'metarelations'. The transitivityy of the relations of action or property to object over the relation of material to object are particularly considered, and clues to this relational structure obtained from Aristotle's theory of causation
-
Hoerman, H.L.; Furniss, K.A.: Turning practice into principles : a comparison of the IFLA Principles underlying Subject Heading Languages (SHLs) and the principles underlying the Library of Congress Subject Headings system (2000)
0.02
0.020466631 = product of:
0.05116658 = sum of:
0.03954072 = weight(_text_:system in 5611) [ClassicSimilarity], result of:
0.03954072 = score(doc=5611,freq=4.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.29527056 = fieldWeight in 5611, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=5611)
0.011625858 = product of:
0.034877572 = sum of:
0.034877572 = weight(_text_:29 in 5611) [ClassicSimilarity], result of:
0.034877572 = score(doc=5611,freq=2.0), product of:
0.14956595 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.04251826 = queryNorm
0.23319192 = fieldWeight in 5611, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=5611)
0.33333334 = coord(1/3)
0.4 = coord(2/5)
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Source
- The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T. Stone
-
Mann, T.: Teaching Library of Congress Subject Headings (2000)
0.02
0.020466631 = product of:
0.05116658 = sum of:
0.03954072 = weight(_text_:system in 5919) [ClassicSimilarity], result of:
0.03954072 = score(doc=5919,freq=4.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.29527056 = fieldWeight in 5919, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=5919)
0.011625858 = product of:
0.034877572 = sum of:
0.034877572 = weight(_text_:29 in 5919) [ClassicSimilarity], result of:
0.034877572 = score(doc=5919,freq=2.0), product of:
0.14956595 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.04251826 = queryNorm
0.23319192 = fieldWeight in 5919, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=5919)
0.33333334 = coord(1/3)
0.4 = coord(2/5)
- Abstract
- An understanding of the workings of Library of Congress Subject Headings (LCSH) is one of the most valuable conceptual tools a researcher can have. The subject heading system is by no means obvious or self-evident, however; it must be taught, explained, and exemplified by librarians. Several points must be covered explicitly. The cross-reference notation of UF, BT, RT, SA, and NT has to be explained; the importance of choosing the most specific heading available, rather than a general term, must also be emphasized. There are four ways to find the most specific LCSH terms for a particular topic; two of them come from using the red books, two from using the online catalog itself. All four ways are important; none is obvious. Each must be taught
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Source
- The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T.Stone
-
Anderson, J.D.; Pérez-Carballo, J.: Library of Congress Subject Headings (LCSH) (2009)
0.02
0.020424798 = product of:
0.051061995 = sum of:
0.03954072 = weight(_text_:system in 3837) [ClassicSimilarity], result of:
0.03954072 = score(doc=3837,freq=4.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.29527056 = fieldWeight in 3837, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=3837)
0.011521274 = product of:
0.03456382 = sum of:
0.03456382 = weight(_text_:22 in 3837) [ClassicSimilarity], result of:
0.03456382 = score(doc=3837,freq=2.0), product of:
0.1488917 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04251826 = 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)
0.33333334 = coord(1/3)
0.4 = coord(2/5)
- Abstract
- Library of Congress Subject Headings (LSCH), which celebrated its 100th birthday in 1998, is the largest cataloging and indexing language in the world for the indication of the topics and formats of books and similar publications. It consists of a controlled list of main headings, many with subdivisions, with a rich system of cross references. It is supported by the U.S. government, and undergoes systematic revision. In recent decades its managers have begun to confront challenges such as biased terminology, complicated syntax (how terms are put together to form headings), and effective displays in electronic media. Many suggestions have been made for its improvement, including moving to a fully faceted system.
- Date
- 27. 8.2011 14:22:13
-
Hearn, S.: Machine-assisted validation of LC Subject Headings : implications for authority file structure (2000)
0.02
0.018473173 = product of:
0.04618293 = sum of:
0.03261943 = weight(_text_:system in 5607) [ClassicSimilarity], result of:
0.03261943 = score(doc=5607,freq=2.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.2435858 = fieldWeight in 5607, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0546875 = fieldNorm(doc=5607)
0.013563501 = product of:
0.0406905 = sum of:
0.0406905 = weight(_text_:29 in 5607) [ClassicSimilarity], result of:
0.0406905 = score(doc=5607,freq=2.0), product of:
0.14956595 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.04251826 = queryNorm
0.27205724 = fieldWeight in 5607, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0546875 = fieldNorm(doc=5607)
0.33333334 = coord(1/3)
0.4 = coord(2/5)
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Source
- The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T.Stone
-
Olson, H.A.: Difference, culture and change : the untrapped potential of LCSH (2000)
0.02
0.018473173 = product of:
0.04618293 = sum of:
0.03261943 = weight(_text_:system in 5610) [ClassicSimilarity], result of:
0.03261943 = score(doc=5610,freq=2.0), product of:
0.13391352 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.04251826 = queryNorm
0.2435858 = fieldWeight in 5610, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.0546875 = fieldNorm(doc=5610)
0.013563501 = product of:
0.0406905 = sum of:
0.0406905 = weight(_text_:29 in 5610) [ClassicSimilarity], result of:
0.0406905 = score(doc=5610,freq=2.0), product of:
0.14956595 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.04251826 = queryNorm
0.27205724 = fieldWeight in 5610, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0546875 = fieldNorm(doc=5610)
0.33333334 = coord(1/3)
0.4 = coord(2/5)
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Source
- The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T. Stone
-
Coates, E.J.: Subject catalogues : headings and structure (1988)
0.02
0.017940167 = product of:
0.08970083 = sum of:
0.08970083 = weight(_text_:index in 1058) [ClassicSimilarity], result of:
0.08970083 = score(doc=1058,freq=2.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.48279524 = fieldWeight in 1058, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.078125 = fieldNorm(doc=1058)
0.2 = coord(1/5)
- Abstract
- This is a reissue of a book originally published in 1960. The new release includes a preface by the author reviewing automation's impact on subject cataloging sind 1960, with emphasis on the BNB and British Technology Index
-
Prasher, R.G.: Index and indexing (1990)
0.02
0.017940167 = product of:
0.08970083 = sum of:
0.08970083 = weight(_text_:index in 4777) [ClassicSimilarity], result of:
0.08970083 = score(doc=4777,freq=2.0), product of:
0.18579477 = queryWeight, product of:
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.04251826 = queryNorm
0.48279524 = fieldWeight in 4777, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.369764 = idf(docFreq=1520, maxDocs=44218)
0.078125 = fieldNorm(doc=4777)
0.2 = coord(1/5)
