-
Smith, D.A.: Use of a thesaurus in two-stage information retrieval of electronic records (1996)
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- Form
- Elektronische Dokumente
-
Schenkel, M.: Vom Leitkartenthesaurus zum Online-Bibliotheksthesaurus : Die Revision des Dokumentationssystems der Bibliothek des Deutschen Bundestages (1949-1998) (1998)
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- Source
- Information und Märkte: 50. Deutscher Dokumentartag 1998, Kongreß der Deutschen Gesellschaft für Dokumentation e.V. (DGD), Rheinische Friedrich-Wilhelms-Universität Bonn, 22.-24. September 1998. Hrsg. von Marlies Ockenfeld u. Gerhard J. Mantwill
-
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)
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- Date
- 15. 3.2000 10:22:37
- Source
- Journal of information science. 25(1999) no.2, S.113-131
-
Lopez-Huertas, M.J.: Thesaurus structure design : a conceptual approach for improved interaction (1997)
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- Abstract
- The need for thesauri to help users in their search for information in online information systems has been discussed for several decades. Many wide-ranging contributions have been made to solve this problem. Nevertheless, investigation is needed to design a thesaurus structure based on what is relevant for users and generators of information within a specific subject domain. Explores the possibility of creating a thesaurus from the cognitive viewpoint. This approach is based on a system that organizes its representation of knowledge or its classification as closely as possible to the authors' and users' images of the subject domain with the objective of increasing the interaction between users and texts, and thus the communication in a given information retrieval system. Discourse analysis is used as a main method to identify the categories and its relevance for building such a structure is discussed
-
Milstead, J.L.: Specifications for thesaurus software (1991)
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- Abstract
- Specifications are presented for software designed to support manual development and maintenance of information retrieval thesauri. The specifications are intended to support both evaluation of existing packages for acquisition and design of custom software. Specialized requirements of thesaurus support are emphasized over more general database management requirements. Requirements for integration with larger systems and for the user interface are summarized. Relationships specified by the ANSI standard should be supported, and the relationships should be validated to avoid introduction of conflicting relationships. Flexibility in availability of note and date fields is important, and where required, term classifications should be available. Maintenance procedures should include provision for feedback on the impact of changes, as well as appropriate levels of approval for changes. A wide variety of online displays and printed reports are required, including but not limited to alphabetical, hierarchical, and rotated. In addition, it is desirable to be absle to search the thesaurus database with such capabilities as Boolean logic and proximity operators
- Source
- Information processing and management. 27(1991) no.2/3, S.165-175
-
Schwarz, I.; Umstätter, W.: ¬Die vernachlässigten Aspekte des Thesaurus : Dokumentarische, pragmatische, semantische und syntaktische Einblicke (1999)
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- Abstract
- Neuentwicklungen in der realen Welt ziehen Veränderungen in der Begriffswelt nach sich. So haben wir es derzeit beispielsweise nicht mehr nur mit Bibliotheken zu tun, vielmehr hat sich das Anwendungsspektrum des Begriffs in neuer Zeit so erweitert, daß wir von der elektronischen, der virtuellen und der digitalen Bibliothek sprechen, wobei diese Bezeichnungen nicht etwa identisch sind, sondern das jeweils Spezifische zu ihrer Entstehungszeit kennzeichnen. Die genaue Reflektion und Einordnung der modernen Thesaurusentwicklungen auf dem Gebiet der Information und Dokumentation zwingt ebenso zu eindeutigen begrifflichen Abgrenzungen und Benennungen. Bislang hat dies u.a. zu den Begriffen 'Information Retrieval Thesaurus', 'Metathesaurus', 'Macrothesaurus' und nicht zuletzt 'semantischer Thesaurus' geführt, die den Begriff des dokumentarischen Thesaurus jeweils spezifizieren. Mit dem Begriff des semiotischen Thesaurus, der den semantischen, den syntaktischen und insbesondere auch den pragmatischen Aspekt berücksichtigt, kennzeichnen wir nun eine neue Entwicklung, die den Thesaurus stärker auf das Begriffssystem des Endnutzers apliziert und damit einen bisher völlig vernachlässigten Bereich der Thesaurusforschung in das Zentrum der Betrachtung rückt. Angeregt von der Bezeichnung 'semantischer Thesaurus' hat uns die Morris'sche Dreistrahligkeit des Zeichenbegriffs zu dieser Benennung geführt, und wir haben den Begriff des pragmatischen Thesaurus aus der semiotischen Perspektive hergeleitet
- Source
- nfd Information - Wissenschaft und Praxis. 50(1999) H.4, S.197-203
-
Crouch, C.J.: ¬An approach to the automatic construction of global thesauri (1990)
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- Abstract
- The benefits of a well constructed thesaurus to an information retrieval system have long been recognised by both researchers and practitioners in the field. Examines both early and current approaches to automatic thesaurus construction and describes an approach to the automatic generation of global thesauri based on the term discrimination value model of Salton Yang, and Yu and on an appropriate clustering algorithm. This method has been implemented and applied to 2 document collections. Preliminary results indicate that this method, which produces improvements in retrieval performance in excess of 10 and 15% in the test collections, is viable and worthy of continued investigation.
- Date
- 22. 4.1996 3:39:53
- Source
- Information processing and management. 26(1990), no.5, S.629-640
-
Osigwe, C.C.: ¬The effect of semantic and syntactic relationships in the choice of descriptor elements for precision in document indexing and information retrieval (1992)
0.01
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- Abstract
- Examines some of the problems arising from the interaction between semantic and syntactic relationships in the working of information retrieval systems and proposes the introduction of a generalised thesaurus, universal programs for database storage and retrieval and for the construction of a common data input format for international information exchange
- Source
- Quarterly bulletin of the International Association of Agricultural Information Specialists. 37(1992) no.4, S.205-208
-
Shapiro, C.D.; Yan, P.-F.: Generous tools : thesauri in digital libraries (1996)
0.01
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- Abstract
- The Electronic Libraries and Information Highways MITRE Sponsored Research project aims to help searchers working in digital libraries increase their chance of matching the language of authors. Focuses on whether query formulation can be improved through the addition of semantic knowledge that is interactively gathered from a thesaurus that exists in a distributed, interoperating, cooperative environment. A prototype, ELVIS, was built that improves information retrieval through query expansion and is based on publicly available Z39.50 standard thesauri integrated with networked information discovery and retrieval tools
- Imprint
- Medford, NJ : Information Today
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Schmitz-Esser, W.: Thesaurus and beyond : an advanced formula for linguistic engineering and information retrieval (1999)
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- Source
- Knowledge organization. 26(1999) no.1, S.10-22
-
Milstead, J.L.: Thesauri in a full-text world (1998)
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- 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
- Imprint
- Urbana-Champaign, IL : Illinois University at Urbana-Champaign, Graduate School of Library and Information Science
- 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
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Rahmstorf, G.: Information retrieval using conceptual representations of phrases (1994)
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- Abstract
- The information retrieval problem is described starting from an analysis of the concepts 'user's information request' and 'information offerings of texts'. It is shown that natural language phrases are a more adequate medium for expressing information requests and information offerings than character string based query and indexing languages complemented by Boolean oprators. The phrases must be represented as concepts to reach a language invariant level for rule based relevance analysis. The special type of representation called advanced thesaurus is used for the semantic representation of natural language phrases and for relevance processing. The analysis of the retrieval problem leads to a symmetric system structure
- Source
- Information systems and data analysis: prospects - foundations - applications. Proc. of the 17th Annual Conference of the Gesellschaft für Klassifikation, Kaiserslautern, March 3-5, 1993. Ed.: H.-H. Bock et al
-
Srinivasan, P.: Thesaurus construction (1992)
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- Abstract
- Thesauri are valuable structures for Information Retrieval systems. A thesaurus provides a precise and controlled vocabulary which serves to coordinate dacument indexing and document retrieval. In both indexing and retrieval, a thesaurus may be used to select the most appropriate terms. Additionally, the thesaurus can assist the searcher in reformulating search strategies if required. Examines the important features of thesauri. This should allow the reader to differentiate between thesauri. Next, a brief overview of the manual thesaurus construction process is given. 2 major approaches for automatic thesaurus construction have been selected for detailed examination. The first is on thesaurus construction from collections of documents,a nd the 2nd, on thesaurus construction by merging existing thesauri. These 2 methods were selected since they rely on statistical techniques alone and are also significantly different from each other. Programs written in C language accompany the discussion of these approaches
- Source
- Information retrieval: data structures and algorithms. Ed.: W.B. Frakes u. R. Baeza-Yates
-
Pollard, R.: ¬A hypertext-based thesaurus as a subject browsing aid for bibliographic databases (1993)
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- Abstract
- Part of a special issue on hypertext and information retrieval. Conventional information retrieval systems provide little support for browsing. Browsing is the major method of searching in hypertext system but users can become disoriented even when browsing small information space. If hypertext is to be used to support browsing in bibliographic databases navigational assistance will be required. Examines the role of thesauri as navigational aids for subject domains of Bibliographic databases. Presents the design of an experimental hypertext-based browsing inference for a thesaurus and its implementation using a commercially available hypertext program. Examines strategies for linking the thesaurus to a database
- Source
- Information processing and management. 29(1993) no.3, S.345-357
-
Schmitz-Esser, W.: ¬Ein Thesaurus als Teil eines terminologischen Lexikons (1995)
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- Abstract
- Der Beitrag enthält die Vorstellung des Entwurfs eines neuen Thesaurus-Konzepts, der vom Komitee für Thesaurusforschung der Deutschen Gesellschaft für Dokumentation entwickelt worden ist. In diesem Konzept soll der Thesaurus nicht allein dem Information Retrieval dienen, es soll als terminologisches Werkzeug auf möglichst allen Feldern des 'Linguistic engineering' eingesetzt werden können.
- Source
- Konstruktion und Retrieval von Wissen: 3. Tagung der Deutschen ISKO-Sektion einschließlich der Vorträge des Workshops "Thesauri als terminologische Lexika", Weilburg, 27.-29.10.1993. Hrsg.: N. Meder u.a
-
Zimmermann, H.H.: Überlegungen zu einem multilingualen Thesaurus-Konzept (1995)
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- Abstract
- Die Thesaurus-Thematik wird zunächst in den Zusammenhang der gesamten Erschließungs- und Retrievalmöglichkeiten eines Information-Retrieval-Systems gestellt. Auf dieser Grundlage wird ein multilinguales Thesaurus-Konzept entwickelt. Wichtige Elemente sind: die Ermöglichung des Zugangs anhand des Benutzervokabulars, eine systematische, transparente Bedeutungsdifferenzierung und eine Basis-Relationierung anhand einer einzigen ("ausgezeichneten") natürlichen Sprache.
- Source
- Konstruktion und Retrieval von Wissen: 3. Tagung der Deutschen ISKO-Sektion einschließlich der Vorträge des Workshops "Thesauri als terminologische Lexika", Weilburg, 27.-29.10.1993. Hrsg.: N. Meder u.a
-
Urdiciain, B.G.: Evaluacion del rendimiento de tesauros Espanoles en sistemas de recuperacion de informacion (1998)
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- Footnote
- Übers. d. Titels: Evaluation of Spanish thesauri for information retrieval
-
Spiteri, L.F.: ¬The essential elements of faceted thesauri (1999)
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- Abstract
- The goal of this study is to evaluate, compare, and contrast how facet analysis is used to construct the systematic or faceted displays of a selection of information retrieval thesauri. More specifically, the study seeks to examine which principles of facet analysis are used in the thesauri, and the extent to which different thesauri apply these principles in the same way. A measuring instrument was designed for the purpose of evaluating the structure of faceted thesauri. This instrument was applied to fourteen faceted information retrieval thesauri. The study reveals that the thesauri do not share a common definition of what constitutes a facet. In some cases, the thesauri apply both enumerative-style classification and facet analysis to arrange their indexing terms. A number of the facets used in the thesauri are not homogeneous or mutually exclusive. The principle of synthesis is used in only 50% of the thesauri, and no one citation order is used consistently by the thesauri.
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Spiteri, L.F.: ¬The use of facet analysis in information retrieval thesauri : an examination of selected guidelines for thesaurus construction (1997)
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- Abstract
- Facet analysis has been used in the construction of faceted thesauri since the publication of the Information Retrieval Thesaurus of Education Terms in 1968. In spite of the growth in the number of faceted thesauri since then, there appears to be little consensus among thesaurus designers regarding how the principles of facet analysis are to be used in thesauri. An examination of various national and international guidelines for thesaurus construction reveals that they emphasize primarily the construction of alphabetical thesauri, but provide little guidance in the use of facet analysis in thesauri.
-
Alonso, M.A.L.: ¬Un tesauro conceptual para la recuperacion de la informacion juridica comercial (1998)
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- Abstract
- The Commercial Law Thesaurus was elaborated as an application of a doctoral investigation into the application of a conceptual model to legal information retrieval. Justifies the need for such a thesaurus, briefly describes the genesis of its construction, and outlines conclusions obtained. Validates the efficiency of the thesaurus in the monitoring carried out in the legal database Juridoc and comments on the display of results as categorized, alphabetical, permuted and conceptual indexes
- Footnote
- Übers. d. Titels: A cognitive thesaurus for retrieval of legal commercial information
