Search (70 results, page 1 of 4)

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Abstract

Considers some structural features of UDC which may be of some importance to on-line information retrieval with synthesised UDC notations

Theme

Klassifikationssysteme im Online-Retrieval

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Theme

Klassifikationssysteme im Online-Retrieval

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Abstract

Facettenklassifikationen wurden bislang vorwiegend im Hinblick auf ihre Verwendungsmöglichkeiten in präkombinierten systematischen Katalogen bzw. Bibliographien betrachtet, nicht so sehr unter dem Aspekt eines möglichen Einsatzes in postkoordinierenden Retrievalsystemen. Im vorliegenden Beitrag soll nachgewiesen werden, daß Facettenklassifikationen anderen Techniken des Online Retrievals überlegen sein können. Hierzu sollten Begriffs- und Facettenanalyse mit einem strukturabbildenden Notationssystem kombiniert werden, um mit Hilfe Boolescher Operatoren (zur Verknüpfung von Facetten unabhängig von einer definierten Citation order) und Truncierung hierarchisch differenzierte Dokumentenmengen für komplexe Fragestellungen zu erhalten. Die Methode wird an zwei Beispielen illustriert: das erste nutzt eine kleine, von B. Buchanan entwickelte Klassifikation, das zweite das für Library and Information Science Abstracts (LISA) verwendete Klassifikationssystem. Weiter wird am Beispiel PRECIS diskutiert, welche Möglichkeiten des syntaktischen Retrievals Rollenoperatoren bieten können.

Theme

Klassifikationssysteme im Online-Retrieval

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Theme

Klassifikationssysteme im Online-Retrieval

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Abstract

Since the introduction of Regeln fur den Schlagwortkatalog (RSWK - Subject Cataloguing Rules) and the arrival of online public catalogues, librarians might ask whether number building is essential or whether the same result could be achieved with Boolean operators. Descriptive categories could be prepared, with word or phrase inversion, as a retrieval system component. The role of syntactic indexing in online retrieval and consequences for service interface ...

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Theme

Semantisches Umfeld in Indexierung u. Retrieval
Klassifikationssysteme im Online-Retrieval

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Theme

Semantisches Umfeld in Indexierung u. Retrieval
Klassifikationssysteme im Online-Retrieval

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Theme

Verbale Doksprachen im Online-Retrieval

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Source

Wissensorganisation im Wandel: Dezimalklassifikation - Thesaurusfragen - Warenklassifikation. Proc. 11. Jahrestagung der Gesellschaft für Klassifikation, Aachen, 29.6.-1.7.1987

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Footnote

Rez. in: Philosophisch-ethische Rezensionen vom 09.11.2019 (Jürgen Czogalla), Unter: https://philosophisch-ethische-rezensionen.de/rezension/Goedert1.html. In: B.I.T. online 23(2020) H.3, S.345-347 (W. Sühl-Strohmenger) [Unter: https%3A%2F%2Fwww.b-i-t-online.de%2Fheft%2F2020-03-rezensionen.pdf&usg=AOvVaw0iY3f_zNcvEjeZ6inHVnOK]. In: Open Password Nr. 805 vom 14.08.2020 (H.-C. Hobohm) [Unter: https://www.password-online.de/?mailpoet_router&endpoint=view_in_browser&action=view&data=WzE0MywiOGI3NjZkZmNkZjQ1IiwwLDAsMTMxLDFd].

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Abstract

The study of faceted classification systems has primarily been directed towards application for precombined catalogues or bibliographies, not so much for use in post coordinated retrieval systems. Argues that faceted classification systems in some respects are superior to other techniques of on-line retrieval as far as facet and concept analysis is combined with an expressive notational system in order to guide a form of retrieval which will use Boolean operators (for combining the facets regardless of one special citation order) and truncation for retrieving hierarchically different sets of documents. This point of view is demonstrated by 2 examples. The 1st one uses a short classification system derived from B. Buchanan and the 2nd is built upon the classification system used by Library and Information Science Abstracts (LISA). Further discussion is concerned with some possible consequences which could be derived from a retrieval with PRECIS strings
"Online retrieval" conjures up a very different mental image now than in 1991, the year this article was written, and the year Tim Berners-Lee first revealed the new hypertext system he called the World Wide Web. Gödert shows that truncation and Boolean logic, combined with notation from a faceted classification system, will be a powerful way of searching for information. It undoubtedly is, but no system built now would require a user searching for material on "nervous systems of bone fish" to enter "Fdd$ and Leaa$". This is worth reading for someone interested in seeing how searching and facets can go together, but the web has made this article quite out of date.

Theme

Klassifikationssysteme im Online-Retrieval

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Abstract

Der Umfang und die Heterogenität des Informationsangebotes erfordert immer differenzierte Methoden und Hilfsmittel für das gezielte und möglichst ballastfreie Auffinden von Informationsquellen im Kontext eines bestimmten Fachgebietes oder einer wissenschaftlichen Disziplin. Um dieses Ziel zu erreichen, wurden in der letzten Zeit eine Reihe sog. Subject Gateways entwickelt. Bislang liegen weder viele Untersuchungen zur Qualität derartiger Hilfsmittel vor noch ist eine differenzierte Methodik für solche Bewertungen entwickelt worden. Das Projekt Evaluation von Subject Gateways des Internet (EJECT) verfolgte daher die Ziele: durch Analyse bereits realisierter Subject Gateways die Verwendungsvielfalt des Begriffes aufzuzeigen und zu einer Präzisierung der Begriffsbildung beizutragen; einen methodischen Weg zur qualitativen Bewertung von Subject Gateways aufzuzeigen; diesen Weg anhand einer Evaluation des Subject Gateways EULER zu testen, das im Rahmen eines EU-Projektes für das Fachgebiet Mathematik entwickelt wurde. Die Resultate der Evaluation werden hier in verkürzter Form vorgestellt und es wird aufgezeigt, inwieweit eine Übertragung auf die Bewertung anderer Gateways möglich ist

Date

22. 6.2002 19:42:22

Source

Information Research & Content Management: Orientierung, Ordnung und Organisation im Wissensmarkt; 23. DGI-Online-Tagung der DGI und 53. Jahrestagung der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis e.V. DGI, Frankfurt am Main, 8.-10.5.2001. Proceedings. Hrsg.: R. Schmidt

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Abstract

Free text searching with keywords in a complete data store is not necessarily the best automatic retrieval method. There must be a proper classification of documents and concepts and the use of a proper classification system avoids problems of terminological deficiency. The dialogue search form makes the on-line catalogue a new information medium. A bibliographic unit must be created with as many search access points as possible, using verbal and classificatory search elements. Verbal search categories must include free text elements for individual search access requirements and a controlled vocabulary with syntactic connections. Classified data should consist of a universal classification system with clear structural notation for access and surface searching, together with several specialist subject classifications for differentiated documentation and retrieval. The universal classification needs no detailed subdivision: it serves mainly as a guide and entry to the detailed sub-systems

Theme

Klassifikationssysteme im Online-Retrieval

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Abstract

Sachliche Suchen in bibliothekarischen Online-Katalogen enden häufig mit unbefriedigenden Ergebnissen. Als eine Ursache dafür kann angesehen werden, daß die Gestaltung des Suchprozesses das semantische Umfeld einer Suchanfrage nicht mit einbezieht, daß in Übertragung der Verhältnisse in konventionellen Katalogen am Paradigma des Wort-Matching zwischen Suchwort und Indexat festgehalten wird. Es wird statt dessen das Konzept einer semantischen Umfeldsuche entwickelt und gezeigt, welche Rolle die Verwendung strukturierten Vokabulars dafür spielen kann. Insbesondere wird dargestellt, welche Möglichkeiten Verfahren der wörterbuchgestützten maschinellen Indexierung in diesem Zusammenhang spielen können. Die Ausführungen werden durch Beispiele illustriert

Theme

Semantisches Umfeld in Indexierung u. Retrieval

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Source

Sacherschließung im Verbund: Vorträge, Materialien und Arbeitsergebnisse eines Fortbildungskurses ... Oberwolfach-Walke vom 6.-11.11.1989. Hrsg. G. Römer

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Abstract

Die Schlagwortnormdatei (SWD) ist mit einem Umfang von ca. 150.000 Sachschlagwörtern das umfangreichste terminologisch kontrollierte deutschsprachige Vokabular, das zur verbalen Inhaltserschließung von Dokumenten genutzt werden und somit prinzipiell auch als Kandidat für den Aufbau semantischer Navigationsstrukturen im Online-Retrieval angesehen werden kann. Die Strukturierung der Schlagwörter in der SWD folgt den Vorgaben zur Ausweisung begrifflicher Strukturen in einem Thesaurus. Durch Veränderungen des der Erstellung der SWD zu Grunde liegenden Regelwerkes RSWK hat sich im Verlauf der Zeit ein Nebeneinander von unterschiedlich dichten Beziehungsnetzen ergeben, ohne dass hierzu bislang Details erhoben und dokumentiert wären. In dieser Studie werden Aussagen über den Aufwand gemacht, der erforderlich wäre, die semantische Relationenstruktur der Schlagwortnormdatei (SWD) zu homogenisieren. Hierzu wird eine quantitative und qualitative Analyse am Beispiel mehrerer Themengebiete vorgenommen. Die Berücksichtigung mehrerer Gebiete soll es gestatten, möglichst repräsentative Aussagen für das gesamte Vokabular abzuleiten. Die Autorinnen und Autoren der Studien sind sich angesichts der zur Verfügung stehenden begrenzten Ressourcen bewusst, dass dieser Anspruch nur mit Einschränkungen eingelöst werden kann. Die für die Analyse der Relationenstruktur benutzten Kriterien orientieren sich an Grundsätzen zur Gestaltung strukturierten Vokabulars sowie insbesondere der Eignung der SWD, zum Aufbau bestandsunabhängiger semantischer Navigationssysteme im Online-Retrieval, für Zwecke des wörterbuchgestützten automatischen Indexierens.

Footnote

Diese Studie wurde im Auftrag der Deutschen Bibliothek durchgeführt und nicht veröffentlicht.

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Abstract

Es wird ein Überblick gegeben, wie sich die Veränderungen sich im Bereich der Informationsverarbeitung und -technik auf die Gestaltung von Studienkonzepten im Bereich Wissensorganisation und Information Retrieval in deutschen bibliothekarischen Ausbildungseinrichtungen ausgewirkt haben. Dabei wird unterschieden in Bereiche der Veränderungen und in Bereiche der Stabilität. Die Bereiche der Veränderungen lassen sich den Verfahren und Anwendungen in der Praxis zuordnen. Sie sind zum einen geprägt durch eine integrative Sicht auf Indexierung und Information Retrieval und lassen sich zum anderen durch folgende Trends charakterisieren: - Von Katalogen zu OPACs und WebOPACs - Von der Katalogisierung zum intelligenten Information Retrieval und Suchmaschinen mit benutzerfreundlichen Interaktionsschnittstellen - Vom lokalen Katalog zum kooperativen Erschließen und Retrieval in heterogenen Netzen - Von intellektueller zu automatischer Indexierung - Von Regelwerken zu strukturierten Beschreibungsebenen (z.B. Metadaten) - Von Beschreibung und Bewertung zu Entwicklungen und Produktdesign Die Bereiche der Stabilität lassen sich der Theorie und den Methoden zuordnen und sind durch folgende Themen beschreibbar: - Grundlagen der Wissensorganisation und Informationserschließung (z.B. in Philosophie, Linguistik, Informatik, Kognitionspsychologie) - Grundlagen der Gestaltung von Dokumentationssprachen - Grundlagen des Information Retrieval

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Content

Vortrag, gehalten anläßlich der Tagung 'Begriffliche Wissensverarbeitung - Methoden und Anwendungen' im Ernst Schröder Zentrum für Begriffliche Wissensverarbeitung an der TH Darmstadt, 22.-25.2.1995

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Abstract

Die Verwendung von Erschließungsinstrumenten zur Beschreibung von Informationsressourcen kann Effizienz und Effektivität thematischer Recherchen wesentlich steigern: standardisierte Begriffe unterstützen Recall und Precision begrifflicher Suchen; Ausweisung von Relationen bietet die Grundlage für explorative Suchprozesse. Eine zusätzliche Steigerung der Funktionalitäten des Retrievals kann mittels einer Ausdifferenzierung und Spezifizierung der in Normdaten enthaltenen semantischen Informationen erreicht werden, die über die in Thesauri und Klassifikationen verbreiteten grundlegenden Relationstypen (äquivalent, hierarchisch, assoziativ) hinausgehen. In modernen Informationsräumen, in denen Daten verschiedener Institutionen über eine Plattform zeit- und ortsunabhängig zugänglich gemacht werden, können einzelne Wissenssysteme indes nur unzureichend das Information Retrieval unterstützen. Zu unterschiedlich sind die für thematische Suchanfragen relevanten Indexierungsdaten. Eine Verbesserung kann mittels Herstellung von Interoperabilität zwischen den verschiedenen Dokumentationssprachen erreicht werden. Im Vortrag wird dargelegt, in welcher Art und Weise die in Wissenssystemen enthaltenen semantischen Informationen zur Unterstützung thematischer Recherchen optimiert werden können und inwiefern Interoperabilität zwischen Systemen geschaffen werden kann, die gleichwertige Funktionalitäten in heterogenen Informationsräumen gewährleisten. In diesem Zusammenhang wird auch auf aktuelle Mappingprojekte wie das DFG-Projekt CrissCross oder das RESEDA-Projekt, welches sich mit den Möglichkeiten der semantischen Anreicherung bestehender Dokumentationssprachen befasst, eingegangen.

Source

https://opus4.kobv.de/opus4-bib-info/frontdoor/index/index/searchtype/authorsearch/author/%22Hubrich%2C+Jessica%22/docId/703/start/0/rows/20