-
Chan, L.M.; Hodges, T.: Entering the millennium : a new century for LCSH (2000)
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- 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
-
MacEwan, A.: Crossing language barriers in Europe : Linking LCSH to other subject heading languages (2000)
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- 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
-
Heiner-Freiling, M.: Survey on subject heading languages used in national libraries and bibliographies (2000)
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- Abstract
- Surveys conducted during the last four years under the auspices of the International Federation of Library Associations and Organizations (IFLA) reveal that the Library of Congress Subject Headings is heavily used in national libraries outside of the United States, particularly in English-speaking countries. Many other countries report using a translation or adaptation of LCSH as their principal subject heading language. Magda Heiner-Freiling presents an analysis of the IFLA data, which also includes information on the classification schemes used by the libraries and whether or not the libraries have produced a manual on the creation and application of subject headings. The paper concludes with an Appendix showing the complete data from the 88 national libraries that respond to the surveys
- Content
- Mit einer tabellarischen Übersicht der eingesetzten Systeme und Regeln
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
-
McIlwaine, I.C.: Subject control : the British viewpoint (1995)
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- Footnote
- Enthält das Ergebnis einer Befragung. 0 hielten das System für sehr gut; 13 für gut; 11 für halbwegs gut; 7 für halbwegs gut; 11 für schlecht. 8,9% der Befragten würden das System übernehmen, 47,5% nicht, 43,6% vielleicht
- Source
- Subject indexing: principles and practices in the 90's. Proceedings of the IFLA Satellite Meeting Held in Lisbon, Portugal, 17-18 August 1993, and sponsored by the IFLA Section on Classification and Indexing and the Instituto da Biblioteca Nacional e do Livro, Lisbon, Portugal. Ed.: R.P. Holley et al
-
Miller, U.; Teitelbaum, R.: Pre-coordination and post-coordination : past and future (2002)
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- 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.
- Source
- Knowledge organization. 29(2002) no.2, S.87-93
-
Cochrane, P.A.: Improving LCSH for use in online catalogs revisited : What progress has been made? What issues still remain? (2000)
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- Abstract
- In 1986 Libraries Unlimited published Cochrane's book, Improving LCSH for Use in Online Catalogs; Exercises for Self-Help with a Selection of Background Readings. This was preceded in 1981 by an ERIC publication (ED 208 900) by Cochrane, with Monika Kirtland Bibliographic and Bibliometric Essay which documented critical views of LCSH and an analysis of vocabulary control in LCSH (parts of which were published in Cataloging & Classification Quarterly' 1(2/3) (1982), 71-94). Three features of LCSH will be re-examined to check on progress since the time of these earlier publications: notes, structure of relationships between headings in the list, and links between Library of Congress classification numbers and LCSH or other vocabularies
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
-
Dutta, A.: ¬A journey from Cutter to Austin : critical analysis of their contribution in subject indexing (2017)
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- 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.
- Theme
- Geschichte der Sacherschließung
-
Cheti, A.; Viti, E.: Functionality and merits of a faceted thesaurus : the case of the Nuovo soggettario (2023)
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- 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
- Footnote
- Beitrag in Themenheft: Implementation of Faceted Vocabularies.
-
Hearn, S.: Machine-assisted validation of LC Subject Headings : implications for authority file structure (2000)
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- Abstract
- Many kinds of structure can be discerned in the headings and rules governing the Library of Congress Subject Headings. By addressing these structures at different levels, librarians can develop different approaches to the machine-assisted validation of subject headings, from the checking of individual words to the validation of complex forms of heading/subdivision compatibility. Using computer programs to assist with maintenance of subject headings is becoming increasingly necessary as technical services librarians strive to create consistent and useful patterns of subject collocation in library catalogs
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
-
Olson, H.A.: Difference, culture and change : the untrapped potential of LCSH (2000)
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- Abstract
- The Library of Congress Subject Headings have traditionally attempted to reflect reality neutrally. The result is bias in representing cultural margins. While neutrality is one of the ethical stances espoused by librarianship, another is universal and equitable access to information for the betterment of humanity. This paper views LCSH as a potential tool for cultural change using Homi Bhabha's postcolonial concept of a Third Space as a model. LCSH functions as a Third Space where the meanings of documents are constructed and enunciated for library users. Therefore, it is in LCSH that there is potential for instigating change
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
-
Hartley, J.; Sydes, M.: Which layout do you prefer? : an analysis of readers' preferences for different typographic layouts of structured abstracts (1996)
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- Abstract
- Structured abstracts are abstracts which include subheadings such as: background, aims, participants methods and results. These are rapidly replacing traditional abstracts in medical periodicals, but the number and detail of the subheadings used varies, and there is a range of different typographic settings. Reviews a number of studies designed to investigate readers' preferences for different typographic settings and layout. Over 400 readers took part in the study: students; postgraduates; research workers and academics in the social sciences. The most preferred version emerged from the last of 3 studies and 2 additional studies were then carried out to determine preferences for the overall position and layout of this most preferred version on a A4 page. The most preferred version for the setting of the subheadings are printed in bold capital letters
- Source
- Journal of information science. 22(1996) no.1, S.27-37
-
O'Neill, E.T.; Chan, L.M.; Childress, E.; Dean, R.; El-Hoshy, L.M.; Vizine-Goetz, D.: Form subdivisions : their identification and use in LCSH (2001)
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- Abstract
- Form subdivisions have always been an important part of the Library of Congress Subject Headings. However, when the MARC format was developed, no separate subfield code to identify form subdivisions was defined. Form and topical subdivisions were both included within a general subdivision category. In 1995, the USMARC Advisory Group approved a proposal defining subfield v for form subdivisions, and in 1999 the Library of Congress (LC) began identifying form subdivisions with the new code. However, there are millions of older bibliographic records lacking the explicit form subdivision coding. Identifying form subdivisions retrospectively is not a simple task. An algorithmic method was developed to identify form subdivisions coded as general subdivisions. The algorithm was used to identify 2,563 unique form subdivisions or combinations of form subdivisions in OCLC's WorldCat. The algorithm proved to be highly accurate with an error rate estimated to be less than 0.1%. The observed usage of the form subdivisions was highly skewed with the 100 most used form subdivisions or combinations of subdivisions accounting for 90% of the assignments.
- Date
- 10. 9.2000 17:38:22
-
Anderson, J.D.; Pérez-Carballo, J.: Library of Congress Subject Headings (LCSH) (2009)
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- 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
-
Sauperl, A.: Precoordination or not? : a new view of the old question (2009)
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- 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.
- Content
- Bezug zu: Svenonius, E.: Precoordination or not?. In: Subject indexing: principles and practices in the 90's. Proceedings of the IFLA Satellite Meeting Held in Lisbon, Portugal, 17-18 August 1993, and sponsored by the IFLA Section on Classification and Indexing and the Instituto da Biblioteca Nacional e do Livro, Lisbon, Portugal. Ed.: R.P. Holley et al. München: Saur 1995. S.231-255.
- Date
- 20. 6.2010 14:22:43
-
Wool, G.: Filing and precoordination : how subject headings are displayed in online catalogs and why it matters (2000)
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- Abstract
- Library of Congress Subjecl Headings retrieved as the results of a search in an online catalog are likely to be filed in straight alphabetical, word-by-word order, ignoring the semantic structures of these headings and scattering headings of a similar type. This practice makes LC headings unnecessarily difficult to use and negates much of their indexing power. Enthusiasm for filing simplicity and postcoordinate indexing are likely contributing factors to this phenomenon. Since the report Headings for Tomorrow (1992) first raised this issue, filing practices favoring postcoordination over precoordination appear to have become more widespread and more entrenched
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
-
Quijano-Solís, A.; Moreno-Jiménex, P.M.; Figueroa-Servín, R.: Automated authority files of Spanish-language subject headings (2000)
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- Abstract
- Authority control of Spanish-language subject headings is described, with a special focus on Mexico. Efforts currently underway in Colombia, Chile, Spain and Mexico, although they share the same language, are somewhat lacking in standardization and cooperation among countries. In the absence of a national authority for bibliographic control in Mexico, a group of university libraries has initiated a cooperative project to build in the near future a national file of Spanish subject headings for the Social Sciences. The project, based upon the experience and rich collections of El Colegio de Mexico, has attracted support from the U.S. Library of Congress and is being partially financed by the U.S.-Mexican Fund for Culture (sponsored by the Rockefeller and Bancomer Foundations). The paper mentions some of the difficulties found in translating LCSH, which is the main resource for the project. These difficulties can include semantics, syndetic structure, or pragmatic problems; most have been solved by supplementing the LCSH with Spanish-language subject heading lists or thesauri
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
-
Fischer, K.S.: Critical views of LCSH, 1990-2001 : the third bibliographic essay (2005)
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- Abstract
- This classified critical bibliography continues the work initiated by Monika Kirtland and Pauline Cochrane, and furthered by Steven Blake Shubert. Kirtland and Cochrane published a bibliography surveying the literature critical of LCSH from 1944-1979 titled "Critical Views of LCSH - Library of Congress Subject Headings, A Bibliographic and Bibliometric Essay." Shubert analyzed another decade of literature in his article titled "Critical Views of LCSH-Ten Years Later: A Bibliographic Essay." This current bibliography compiles the next twelve years of critical literature from 1990-2001. Persistent concerns of the past fifty-seven years include inadequate syndetic structure, currency or bias of the headings, and lack of specificity in the subject heading list. New developments and research are in the areas of subdivisions, mapping, indexer inconsistency, and post-coordination. LCSH must become more flexible and easier to use in order to increase its scalability and interoperability as an online subject searching tool.
- Date
- 29. 9.2008 19:07:48
- Footnote
- Vgl. auch die Vorgänger: Kirtland, M., P.A. Cochrane: Critical views of LCSH - Library of Congress Subject Headings: a bibliographic and bibliometric essay. In: Cataloging and classification quarterly. 1(1982) no.2/3, S.71-93. Shubert, S.B.: Critical views of LCSH - ten years later: a bibliographic essay. In: Cataloging and classification quarterly. 15(1992) no.2, S.37-97.
-
Studwell, W.E.: Why not an 'AACR' for subject headings? (1985)
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- Abstract
- Although the rules for descriptive cataloging have been recodified twice in the past twenty years, there never has been any kind of comprehensive theoretical code for subject headings, despite some suggestions for a code over the years. This essay explains the need for a code, provides historical background, and presents some broad proposals as to the philosophy, structure, and form of the code and what the code should cover. Included is the relation between the proposed code and the Library of Congress' 1984 Subject Cataloging Manual.
- Date
- 7. 1.2007 13:22:01
-
Hearn, S.: Comparing catalogs : currency and consistency of controlled headings (2009)
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- Abstract
- Evaluative and comparative studies of catalog data have tended to focus on methods that are labor intensive, demand expertise, and can examine only a limited number of records. This study explores an alternative approach to gathering and analyzing catalog data, focusing on the currency and consistency of controlled headings. The resulting data provide insight into libraries' use of changed headings and their success in maintaining currency and consistency, and the systems needed to support the current pace of heading changes.
- Date
- 10. 9.2000 17:38:22
-
Svenonius, E.: LCSH: semantics, syntax and specifity (2000)
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- Abstract
- This paper looks at changes affecting LCSH over its 100-year history. Adopting a linguistic conceptualization, it frames these changes as relating to the semantics, syntax and pragmatics of the LCSH language. While its category semantics has remained stable over time, the LCSH relational semantics underwent a significant upheaval when a thesaural structure was imposed upon its traditional See and See also structure. Over time the LCSH syntax has become increasingly complex as it has moved from being largely enumerative to in large part synthetic. Until fairly recently the LCSH pragmatics consisted of only one rule, viz, the injunction to assign specific headings. This rule, always controversial, has become even more debated and interpreted with the move to the online environment
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
