-
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
-
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
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Bodoff, D.; Kambil, A.: Partial coordination : I. The best of pre-coordination and post-coordination (1998)
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- Abstract
- The introduction of computerized post-coordination has solved many of the problems of pre-coordinated subject access. However, the adoption of computerized post-coordination results in the loss of some pre-coordination benefits. Specifically, the effect of hiding terms within the context of others is lost in post-coodination which give lead status to every document term. This results in spurious matches of terms out of context. Library patrons and Internet searchers are increasingly dissatisfied with subject access performance, in part because of unmanageably large retrieval sets. The need to enhance precision and limit the size of retrieval sets motivates this work which proposes partial coordination, an approach which incorporates the advantages of computer search with the ability of pre-coordination to limit spurious partial matches and thereby enhance precision
- Theme
- Verbale Doksprachen im Online-Retrieval
-
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
- Theme
- Verbale Doksprachen im Online-Retrieval
-
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.
- Date
- 20. 6.2010 14:22:43
-
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)
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- 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
- Date
- 29. 7.1998 13:16:16
-
Svenonius, E.: LCSH: semantics, syntax and specifity (2000)
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- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Svenonius, E.: LCSH: semantics, syntax and specifity (2000)
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- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Theme
- Verbale Doksprachen im Online-Retrieval
-
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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- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Theme
- Verbale Doksprachen im Online-Retrieval
-
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)
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- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Wool, G.: Filing and precoordination : how subject headings are displayed in online catalogs and why it matters (2000)
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- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Kreider, L.J.: LCSH works! : Subject searching effectiveness at the Cleveland Public Library and the growth of Library of Congress Subject Headings through cooperation (2000)
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- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Anderson, J.D.; Pérez-Carballo, J.: Library of Congress Subject Headings (LCSH) (2009)
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- Date
- 27. 8.2011 14:22:13
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Bodoff, D.; Kambil, A.: Partial coordination : II. A preliminary evaluation and failure analysis (1998)
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- Abstract
- Partial coordination is a new method for cataloging documents for subject access. It is especially designed to enhance the precision of document searches in online environments. This article reports a preliminary evaluation of partial coordination that shows promising results compared with full-text retrieval. We also report the difficulties in empirically evaluating the effectiveness of automatic full-text retrieval in contrast to mixed methods such as partial coordination which combine human cataloging with computerized retrieval. Based on our study, we propose research in this area will substantially benefit from a common framework for failure analysis and a common data set. This will allow information retrieval researchers adapting 'library style'cataloging to large electronic document collections, as well as those developing automated or mixed methods, to directly compare their proposals for indexing and retrieval. This article concludes by suggesting guidelines for constructing such as testbed
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Frommeyer, J.: Zeitbegriffe und Zeitcodierungen in allgemeinbibliographischen Datenbanken : eine Analyse von RSWK, LCSH und RAMEAU sowie Entwicklung eines theoretischen Modells für ein Zeitretrieval (2003)
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- Footnote
- Rez. in: ZfBB 50(2003) H.5, S.295-297 (E. Scheven):"In ihrem Buch »Zeitbegriffe und Zeitcodierungen in allgemeinbibliographischen Datenbanken« entwickelt die Autorin ein theoretisches Modell für ein Zeitretrieval in allgemeinbibliografischen Datenbanken. Dafür untersucht sie die Verwendung von Zeitbegriffen (Epochenbezeichnungen, historiografischen Begriffen) und Zeitcodierungen (Jahreszahlen, Datumsangaben) bei der Indexierung von Dokumenten in allgemeinbibliografischen Datenbanken und deren Retrievalmöglichkeiten. Durch Globalisierung und Internet ist der Zugang zu den Katalogen unterschiedlichster lnstitutionen weit überdie Landesgrenzen hinaus möglich geworden. Dadurch ist der Zwang zur Standardisierung der bibliothekarischen Regeln weltweit verschärft, um Daten-Interoperabilität zu gewährleisten. Hauptziel der Sacherschließung muss immer die optimale Befriedigung der Benutzerbedürfnisse sein. - Kompetente Einführung - Nach einer kurzen geschichtlichen Darstellung der Zeitrechnung an sich und der bibliothekarischen Regelentwicklung wendet sich die Autorin den wichtigsten Sacherschließungswerkzeugen der westlichen WeIt zu, zum einen den beiden internationalen Universalklassifikationen, DDC und UDK, und zum anderen den drei Schlagwortsystemen LCSH, Rameau und SWD,wobei sieden Schwerpunkt auf die verbalen Sacherschließungssysteme legt. LCSH, Rameau und SWD mit RSWK werden kompetent und ausführlich in 164 von 316 Seiten mit ihrer Entwicklungsgeschichte und ihren Unterschieden dargestellt. Jutta Frommeyer ist hier eine gute vergleichende Einführung in die großen verbalen Sacherschließungssysteme gelungen und zwar nicht nur für Anfänger, sondern auch für praxis-erfahrene Sacherschließer. Die Darstellung von Zeitaspekten nach LCSH kann nach sechs verschiedenen Varianten erfolgen. Es gibt keine allgemeinen subdivisions für Zeitangaben. Rameau stimmt in seiner Struktur mit den LCSH überein, weicht aber bei der Indexierung bezüglich der subdivisions von den LCSH ab. Rameau hat eine allgemein zu verwendende Liste (subdivision) mit ca. 40 Unterteilungen für den Zeitaspekt. Nach RSWK wird der Zeitaspekt durch so genannte Zeitschlagwörter wiedergegeben, die wie auch bestimmte Formalschlagwörter durch Jahreszahlen erweitert werden können. Der im Dokument behandelte Zeitabschnitt wird für die Beschlagwortung herangezogen. Vorgegebene Zeituntergliederungen für bestimmte Themenbereiche wie bei LCSH und Rameau gibt es bei RSWK nicht. Zwischen den Schlagwortsystemen gibt es unterschiedliche Indexierungsregeln, wann ein Zeitschlagwort benutzt werden soll oder nicht.
- Retrievalmöglichkeiten - Ein Test der Retrievalmöglichkeiten von Zeitangaben in den Online-Katalogen der LoC, BnF und DDB zeigte, dass für ein optimales Suchergebnis viele Recherche-Schritte und Regelwerkskenntnisse notwendig sind, eine aus Nutzersicht unbefriedigende Bilanz. Zum Beispiel muss für Suchanfragen nach Jahreszahlen der Zeitraum genauso angegeben werden, wie es bei der Indexierung geschah, oder eine Suche mit Epochenbegriffen und zeitimmanenten Schlagwörtern erfordert die genaue Kenntnis der Ansetzungsregeln für solche Deskriptoren. Die angebotenen Schlagwortketten sind eine Suchhilfe, erlauben aber keine Sortierung nach der Zeitenabfolge. Der größte Mangel ist, dass alle Zeitcodierungen nur als Zeichen, nicht als Zahlen, erkennbar sind, sodass bei der Suche nur ein Zeichenabgleich erfolgt und keine Sortierung nach Zahlen möglich ist. Jutta Frommeyer stellt die Retrievalmöglichkeiten der drei genannten Bibliothekskataloge verschiedenen anderen Datenbanken gegenüber, die eine Suche nach Zeitangaben anbieten. Die Suchmöglichkeiten bei den Allgemeinenzyklopädien (»Encyclopedia Britannica«, »Brockhaus-Enzyklopädie«, »Encarta«) sind vielfältig und elaboriert. Zeitimmanente Begriffe sind chronologisch angeordnet und auch grafisch durch Zeitschienen dargestellt, von denen aus auf ein Jahr oder einen Zeitbegriff gesprungen werden kann. Die Datenbank »Historical abstracts« bietet den Zeitraum, der in einem Dokument behandelt wird, über eine spezielle Codierung an. Die »Jahresberichte für deutsche Geschichte« bieten für das Zeitretrieval eine Tabelle mit 14 verschiedenen Möglichkeiten; die weitere Differenzierung der Suchanfrage erfolgt hier durch andere Sacherschließungselemente wie eine ausgefeilte Klassifikation und eine Schlagwortliste. - Modell zum optimalen Zeitretrieval - Aufgrund ihrer Untersuchungen entwickelt die Autorin ein theoretisches Modell für ein optimales Zeitretrieval in allgemeinbibliografischen Datenbanken mit den drei Elementen Zeitcode, Chronikcode und Chroniknormdatei. Damit die Zeitcodierungen als Zahlen und nicht als Zeichen erkennbar sind, müssen sie in einem besonderen numerischen Feld (Zeitcode) abgelegt werden; mit der Möglichkeit, nach Zeiträumen zu suchen (Größer-, Kleiner- und Gleichoperatoren). Die Zeitspannen von Zeitbegriffen werden als Chronikcode in der gleichen Datenstruktur wie der Zeitcode bei den Normdatensätzen ergänzt. Für bestimmte Zeitbegriffe ist eine Normierung notwendig (z. B. Mittelalter). Bei kulturkreisabhängigen Zeitbegriffen kann die zeitliche Codierung verschieden aussehen. Die Chroniknormdatei soll die chronologische Relation der zeitimmanenten Begriffe darstellen und bei umfassenden Zeitspannen große Trefferzahlen vermeiden. Da zeitimmanente Begriffe über alle Sachgebiete streuen, muss für das Retrieval eine sachliche Einschränkung gegeben sein. Jutta Frommeyer schlägt dafür eine international angewandte Klassifikation vor. Die Autorin stellt ein Retrievalmodell dar, um das Zusammenwirken von Zeitcode,Chronikcode und Chroniknormdatei zu demonstrieren. Dabei hat sie sich an der heutigen Menü-Oberfläche für OPACs orientiert und ein neues Suchfeld »Zeitabschnitt« mit verschiedenen Unterteilungen eingeführt. Ihre Beispiele sind nachvollziehbar und verdeutlichen ihren Vorschlag. Die Umsetzung eines solchen Modells hat Auswirkungen auf die vorhandenen Datenstrukturen; auch wird eine Annäherung der Regeln für die Schlagwortvergabe nach RSWK, Rameau und LCSH notwendig sein, wenn so eine Suche international angeboten werden soll.
- RSWK
- Information Retrieval / Zeitraum (21)
- Subject
- Information Retrieval / Zeitraum (21)
-
Lopes, M.I.: Principles underlying subject heading languages : an international approach (1996)
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- Abstract
- Discusses the problems in establishing commonly accepted principles for subject retrieval between different bibliographic systems. The Working Group on Principles Underlying Subject Heading Languages was established to devise general principles for any subject retrieval system and to review existing real systems in the light of such principles and compare them in order to evaluate the extent of their coverage and their application in current practices. Provides a background and history of the Working Group. Discusses the principles underlying subject headings and their purposes and the state of the work and major findings
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Geißelmann, F.: RSWK für den Online-Katalog : Werkstattbericht zur 3. Auflage (1997)
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- Theme
- Verbale Doksprachen im Online-Retrieval
-
Austin, D.: PRECIS: Introduction (1987)
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- Footnote
- Zusammenfassende kompakte Darstellung des Systems PRECIS, seiner Geschichte, Eigenschaften und Möglichkeiten bis hin zum Online-Retrieval. - Als Einführung zu empfehlen
-
¬The LCSH century : One hundred years with the Library of Congress Subject Headings system (2000)
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- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
- Theme
- Verbale Doksprachen im Online-Retrieval
-
¬The LCSH century : One hundred years with the Library of Congress Subject Headings system (2000)
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- Source
- Cataloging and classification quarterly. 29(2000) nos.1/2, S.1-249
- Theme
- Verbale Doksprachen im Online-Retrieval
