Search (135 results, page 2 of 7)

0.03823962 = product of:
  0.15295848 = sum of:
    0.15295848 = weight(_text_:headings in 3192) [ClassicSimilarity], result of:
      0.15295848 = score(doc=3192,freq=4.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.4549126 = fieldWeight in 3192, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.046875 = fieldNorm(doc=3192)
  0.25 = coord(1/4)

Abstract

Work in establishing interoperability between Subject Heading Languages (SHLs) in Europe is fairly recent and much work is still needed before users can successfully conduct subject searches across information resources in European libraries. Over the last 25 years many subject heading lists were created or developed from existing ones. Obstacles for effective interoperability have been progressively lifted which has paved the way for interoperability projects to achieve some encouraging results. This paper will look at interoperability approaches in the area of subject indexing tools and will present a short overview of the development of European SHLs. It will then look at the conditions necessary for effective and comprehensive interoperability using the method of linking subject headings, as used by the »Multilingual Access to Subject Headings project« (MACS).

0.03823962 = product of:
  0.15295848 = sum of:
    0.15295848 = weight(_text_:headings in 2886) [ClassicSimilarity], result of:
      0.15295848 = score(doc=2886,freq=4.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.4549126 = fieldWeight in 2886, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.046875 = fieldNorm(doc=2886)
  0.25 = coord(1/4)

Abstract

This article presents an Italian experience of developing streamlined semantic interoperability between the Italian Thesaurus of Nuovo soggettario and the Library of Congress Subject Headings (LCSH). This ongoing project must take into consideration the differences between the two indexing tools, while the criteria on which the resulting actions are based are being clarified continually. Reciprocal interoperability, thanks to the Simple Knowledge Organization System format, enables us to create links with English language subject headings. The National Central Library of Florence is studying methods of automatically catching LCSH equivalents and the question of how to take advantage of both Semantic Web outputs and the multilingual dataset of Wikidata.

0.03605266 = product of:
  0.14421064 = sum of:
    0.14421064 = weight(_text_:headings in 3787) [ClassicSimilarity], result of:
      0.14421064 = score(doc=3787,freq=2.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.4288957 = fieldWeight in 3787, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.0625 = fieldNorm(doc=3787)
  0.25 = coord(1/4)

Abstract

The MACS project aims at providing multilingual subject access to library catalogues through the use of concordances between subject headings from LCSH, RAMEAU and SWD. The manual approach, as used by MACS, has been up to now the most reliable method for ensuring accurate multilingual subject access to bibliographic data. The presentation will give an overview on the development of the project and will outline the strategy and methods used by the MACS project. The presentation will also include a demonstration of the search interface developed by The European Library (TEL).

0.031866353 = product of:
  0.12746541 = sum of:
    0.12746541 = weight(_text_:headings in 787) [ClassicSimilarity], result of:
      0.12746541 = score(doc=787,freq=4.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.37909386 = fieldWeight in 787, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.0390625 = fieldNorm(doc=787)
  0.25 = coord(1/4)

Abstract

This study considers the expressiveness (that is the expressive power or expressivity) of different types of Knowledge Organization Systems (KOS) and discusses its potential to be machine-processable in the context of the Semantic Web. For this purpose, the theoretical foundations of KOS are reviewed based on conceptualizations introduced by the Functional Requirements for Subject Authority Data (FRSAD) and the Simple Knowledge Organization System (SKOS); natural language processing techniques are also implemented. Applying a comparative analysis, the dataset comprises a thesaurus (Eurovoc), a subject headings system (LCSH) and a classification scheme (DDC). These are compared with an ontology (CIDOC-CRM) by focusing on how they define and handle concepts and relations. It was observed that LCSH and DDC focus on the formalism of character strings (nomens) rather than on the modelling of semantics; their definition of what constitutes a concept is quite fuzzy, and they comprise a large number of complex concepts. By contrast, thesauri have a coherent definition of what constitutes a concept, and apply a systematic approach to the modelling of relations. Ontologies explicitly define diverse types of relations, and are by their nature machine-processable. The paper concludes that the potential of both the expressiveness and machine processability of each KOS is extensively regulated by its structural rules. It is harder to represent subject headings and classification schemes as semantic networks with nodes and arcs, while thesauri are more suitable for such a representation. In addition, a paradigm shift is revealed which focuses on the modelling of relations between concepts, rather than the concepts themselves.

0.031866353 = product of:
  0.12746541 = sum of:
    0.12746541 = weight(_text_:headings in 1979) [ClassicSimilarity], result of:
      0.12746541 = score(doc=1979,freq=4.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.37909386 = fieldWeight in 1979, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.0390625 = fieldNorm(doc=1979)
  0.25 = coord(1/4)

Abstract

The research study as reported here is an attempt to explore the possibilities of an AI/ML-based semi-automated indexing system in a library setup to handle large volumes of documents. It uses the Python virtual environment to install and configure an open source AI environment (named Annif) to feed the LOD (Linked Open Data) dataset of Library of Congress Subject Headings (LCSH) as a standard KOS (Knowledge Organisation System). The framework deployed the Turtle format of LCSH after cleaning the file with Skosify, applied an array of backend algorithms (namely TF-IDF, Omikuji, and NN-Ensemble) to measure relative performance, and selected Snowball as an analyser. The training of Annif was conducted with a large set of bibliographic records populated with subject descriptors (MARC tag 650$a) and indexed by trained LIS professionals. The training dataset is first treated with MarcEdit to export it in a format suitable for OpenRefine, and then in OpenRefine it undergoes many steps to produce a bibliographic record set suitable to train Annif. The framework, after training, has been tested with a bibliographic dataset to measure indexing efficiencies, and finally, the automated indexing framework is integrated with data wrangling software (OpenRefine) to produce suggested headings on a mass scale. The entire framework is based on open-source software, open datasets, and open standards.

0.03154608 = product of:
  0.12618431 = sum of:
    0.12618431 = weight(_text_:headings in 2734) [ClassicSimilarity], result of:
      0.12618431 = score(doc=2734,freq=2.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.37528375 = fieldWeight in 2734, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.0546875 = fieldNorm(doc=2734)
  0.25 = coord(1/4)

Abstract

BARTOC, http://bartoc.org, is a bibliographic database that provides metadata of as many Knowledge Organization Systems (KOS) as possible and offers a faceted, responsive web design search interface in 20 languages. With more than 1100 interdisciplinary items (Thesauri, Ontologies, Classifications, Glossaries, Controlled Vocabularies, Taxonomies) in 70 languages, BARTOC is the largest database of its kind, multilingual both by content and features, and will still be growing. Metadata are being enriched with DDC-numbers down to the third level, and subject headings from EuroVoc, the EU's multilingual thesaurus. BARTOC has been developed by the University Library of Basel, Switzerland, and continues in the tradition of library and information science to collect bibliographic records of controlled and structured vocabularies.

0.027039494 = product of:
  0.10815798 = sum of:
    0.10815798 = weight(_text_:headings in 1918) [ClassicSimilarity], result of:
      0.10815798 = score(doc=1918,freq=2.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.32167178 = fieldWeight in 1918, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.046875 = fieldNorm(doc=1918)
  0.25 = coord(1/4)

Abstract

The paper describes a project to add value to controlled vocabularies by making inter-vocabulary associations. A methodology for mapping terms from one vocabulary to another is presented in the form of a case study applying the approach to the Educational Resources Information Center (ERIC) Thesaurus and the Library of Congress Subject Headings (LCSH). Our approach to mapping involves encoding vocabularies according to Machine-Readable Cataloging (MARC) standards, machine matching of vocabulary terms, and categorizing candidate mappings by likelihood of valid mapping. Mapping data is then stored as machine links. Vocabularies with associations to other schemes will be a key component of Web-based terminology services. The paper briefly describes how the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) is used to provide access to a vocabulary with mappings.

0.027039494 = product of:
  0.10815798 = sum of:
    0.10815798 = weight(_text_:headings in 3433) [ClassicSimilarity], result of:
      0.10815798 = score(doc=3433,freq=2.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.32167178 = fieldWeight in 3433, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.046875 = fieldNorm(doc=3433)
  0.25 = coord(1/4)

Abstract

This report presents the results of desk-top based study of projects and initiatives in the area of linking and mapping subject tools. While its goal is to provide areas of further study for cross-language subject access in the European Library, and specifically the national libraries of the Ten New Member States, it is not restricted to cross-language mappings since some of the tools used to create links across thesauri or subject headings in the same language may also be appropriate for cross-language mapping. Tools reviewed have been selected to represent a variety of approaches (e.g. subject heading to subject heading, thesaurus to thesaurus, classification to subject heading) reflecting the variety of subject access tools in use in the European Library. The results show that there is no single solution that would be appropriate for all libraries but that parts of several initiatives may be applicable on a technical, organisational or content level.

0.027039494 = product of:
  0.10815798 = sum of:
    0.10815798 = weight(_text_:headings in 26) [ClassicSimilarity], result of:
      0.10815798 = score(doc=26,freq=2.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.32167178 = fieldWeight in 26, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.046875 = fieldNorm(doc=26)
  0.25 = coord(1/4)

0.027039494 = product of:
  0.10815798 = sum of:
    0.10815798 = weight(_text_:headings in 158) [ClassicSimilarity], result of:
      0.10815798 = score(doc=158,freq=2.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.32167178 = fieldWeight in 158, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.046875 = fieldNorm(doc=158)
  0.25 = coord(1/4)

Abstract

The treatment of subjects by Functional Requirements for Bibliographic Records (FRBR) has attracted less attention than some of its other aspects, but there seems to be a general consensus that it needs work. While some have proposed elaborating its subject categories-concepts, objects, events, and places-to increase their semantic complexity, a working group of the International Federation of Library Associations and Institutions (IFLA) has recently made a promising proposal that essentially bypasses those categories in favor of one entity, thema. This article gives an overview of the proposal and discusses its relevance to another difficult problem, ambiguities in the establishment of headings for buildings.Use of dynamic links from subject-based finding aids to records for electronic resources in the OPAC is suggested as one method for by-passing the OPAC search interface, thus making the library's electronic resources more accessible. This method simplifies maintenance of links to electronic resources and aids instruction by providing a single, consistent access point to them. Results of a usage study from before and after this project was completed show a consistent, often dramatic increase in use of the library's electronic resources.

0.025493082 = product of:
  0.10197233 = sum of:
    0.10197233 = weight(_text_:headings in 952) [ClassicSimilarity], result of:
      0.10197233 = score(doc=952,freq=4.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.30327508 = fieldWeight in 952, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.03125 = fieldNorm(doc=952)
  0.25 = coord(1/4)

Abstract

The paper discusses the importance of these initiatives in releasing as linked data the very large quantities of rich, professionally-generated metadata stored in formats based on these standards, such as UNIMARC and MARC21, addressing such issues as critical mass for semantic and statistical inferencing, integration with user- and machine-generated metadata, and authenticity, veracity and trust. The paper also discusses related initiatives to release controlled vocabularies, including the Dewey Decimal Classification (DDC), ISBD, Library of Congress Name Authority File (LCNAF), Library of Congress Subject Headings (LCSH), Rameau (French subject headings), Universal Decimal Classification (UDC), and the Virtual International Authority File (VIAF) as linked data. Finally, the paper discusses the potential collective impact of these initiatives on metadata workflows and management systems.

0.022532912 = product of:
  0.09013165 = sum of:
    0.09013165 = weight(_text_:headings in 2171) [ClassicSimilarity], result of:
      0.09013165 = score(doc=2171,freq=2.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.26805982 = fieldWeight in 2171, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.0390625 = fieldNorm(doc=2171)
  0.25 = coord(1/4)

Abstract

Amid the debates about whether folksonomies will supplant controlled vocabularies and whether the Library of Congress Subject Headings (LCSH) and Dewey Decimal Classification (DDC) system have outlived their usefulness, libraries, museums and other organizations continue to require efficient, effective access to controlled vocabularies for creating consistent metadata for their collections . In this article, we present an approach for using Web services to interact with controlled vocabularies. Services are implemented within a service-oriented architecture (SOA) framework. SOA is an approach to distributed computing where services are loosely coupled and discoverable on the network. A set of experimental services for controlled vocabularies is provided through the Microsoft Office (MS) Research task pane (a small window or sidebar that opens up next to Internet Explorer (IE) and other Microsoft Office applications). The research task pane is a built-in feature of IE when MS Office 2003 is loaded. The research pane enables a user to take advantage of a number of research and reference services accessible over the Internet. Web browsers, such as Mozilla Firefox and Opera, also provide sidebars which could be used to deliver similar, loosely-coupled Web services.

0.022532912 = product of:
  0.09013165 = sum of:
    0.09013165 = weight(_text_:headings in 3251) [ClassicSimilarity], result of:
      0.09013165 = score(doc=3251,freq=2.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.26805982 = fieldWeight in 3251, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.0390625 = fieldNorm(doc=3251)
  0.25 = coord(1/4)

Abstract

In economics there exists an internationally established classification system. Research literature is usually classified according to the JEL classification codes, a classification system originated by the Journal of Economic Literature and published by the American Economic Association (AEA). Complementarily to keywords which are usually assigned freely, economists widely use the JEL codes when classifying their publications. In cooperation with KU Leuven, ZBW - Leibniz Information Centre for Economics has published an unofficial multilingual version of JEL in SKOS format. In addition to this, exists the STW Thesaurus for Economics a bilingual domain-specific controlled vocabulary maintained by the German National Library of Economics (ZBW). Developed in the mid-1990s and since then constantly updated according to the current terminology usage in the latest international research literature in economics it covers all sub-fields both in the economics as well as in business economics and business practice containing subject headings which are clearly delimited from each other. It has been published on the web as Linked Open Data in the year 2009.

0.018829878 = product of:
  0.07531951 = sum of:
    0.07531951 = weight(_text_:und in 848) [ClassicSimilarity], result of:
      0.07531951 = score(doc=848,freq=32.0), product of:
        0.15368472 = queryWeight, product of:
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.069292925 = queryNorm
        0.4900911 = fieldWeight in 848, product of:
          5.656854 = tf(freq=32.0), with freq of:
            32.0 = termFreq=32.0
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.0390625 = fieldNorm(doc=848)
  0.25 = coord(1/4)

Abstract

Prozessketten in der freien Wirtschaft oder Verwaltung sind zunehmend geprägt von einem intensiven Austausch von Dokumenten und Daten auch über die Grenzen der beteiligten Organisationen hinweg. Wie in Band 1 der White Paper-Reihe dargelegt, ist die Sicherstellung der semantischen Interoperabilität eine der zentralen Anforderungen für einen semantisch konsistenten und damit erfolgreichen Ablauf der Geschäftsprozesse. Grundlage für semantische Interoperabilität sind die technische und die syntaktische Interoperabilität: Die technische Interoperabilität umfasst die Möglichkeit der technischen Interaktion mit sowie des Transports von Inhalten und erfordert dafür die leitungstechnische Verbindbarkeit und Passbarkeit auf Protokollebene. Die syntaktische Interoperabilität wird durch einen homogenen Einsatz von Sprachen (wie z. B. XML) sichergestellt und gewährleistet den Austausch von Daten auf Basis von vordefinierten und exakt vereinbahrten syntaktischen Strukturen. Semantische Interoperabilität stellt die komplexeste unter den Stufen der Interoperabilität dar. Der wesentliche Grund dafür, dass die Anforderung der semantischen Interoperabilität nicht erfüllt wird, ist das Vorhandensein bzw. die fehlende Auflösung sogenannter semantischer Konflikte. Ein semantischer Konflikt wird hervorgerufen, wenn die am Datenaustausch beteiligten Sender und Empfänger unterschiedliche Datenstrukturen und Dateninhalte verwenden. Eine detaillierte Beschreibung der Konfliktarten und ihrer Behandlung zeigen die nächsten Abschnitte.

Content

Um zwischen Behörden, Wirtschaft und Bürgern durchgängige Prozessketten zu erreichen, wird heute weitgehend auf internetgestützte Kooperation gesetzt. Vielfach sind dabei Insellösungen und autarke IT-Fachanwendungen entstanden, die nicht ohne Weiteres interoperabel sind. Trotz eines syntaktisch korrekten Datenaustausches können die Nutzung unterschiedlicher Begriffe, Datenstrukturen und Schreibkonventionen zu Fehlinterpretationen führen. In der White Paper-Reihe »Semantische Interoperabilität« vermittelt das Fraunhofer ISST in verständlicher Weise Grundlagen und Lösungsansätze des »Semantic Interoperability Engineerings « (SIE). Die Reihe richtet sich an technisch interessierte Personenkreise mit und ohne fachliches Vorwissen (vom Projektleiter bis zum CIO). Vgl.: http://www.isst.fraunhofer.de/geschaeftsfelder/gfegovernment/referenzprojekte/sie/white-paper/index.jsp.

Imprint

Berlin : Fraunhofer-Institut für Software- und Systemtechnik ISST

0.018640628 = product of:
  0.07456251 = sum of:
    0.07456251 = weight(_text_:und in 1369) [ClassicSimilarity], result of:
      0.07456251 = score(doc=1369,freq=16.0), product of:
        0.15368472 = queryWeight, product of:
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.069292925 = queryNorm
        0.48516542 = fieldWeight in 1369, product of:
          4.0 = tf(freq=16.0), with freq of:
            16.0 = termFreq=16.0
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.0546875 = fieldNorm(doc=1369)
  0.25 = coord(1/4)

Abstract

coli-conc ist eine Dienstleistung der Verbundzentrale des Gemeinsamen Bibliotheksverbundes (VZG). Sie stellt webbasierte Dienste für einen effektiveren Austausch von Wissensorganisationssystemen und für die effiziente Erstellung und Wartung von Mappings zur Verfügung. Der Schwerpunkt liegt auf den im deutschsprachigen Raum verbreiteten bibliothekarischen Klassifikationen und Normdateien, vor allem den bedeutenden Universalklassifikationen wie Dewey Dezimalklassifikation (DDC), Regensburger Verbundklassifikation (RVK), Basisklassifikation (BK) und den Sachgruppen der Deutschen Nationalbibliografie (SDNB). Dieser Bericht beschreibt den Hintergrund, die Architektur und die Funktionalitäten von coli-conc sowie das Herzstück der Infrastruktur - das Mapping-Tool Cocoda. Außerdem wird auf Maßnahmen zur Qualitätssicherung eingegangen und ein Einblick in das neue Mapping-Verfahren mit dem Konzept- Hub gewährt.

Series

Bibliotheks- und Informationspraxis; 70

0.018449437 = product of:
  0.07379775 = sum of:
    0.07379775 = weight(_text_:und in 3175) [ClassicSimilarity], result of:
      0.07379775 = score(doc=3175,freq=12.0), product of:
        0.15368472 = queryWeight, product of:
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.069292925 = queryNorm
        0.48018923 = fieldWeight in 3175, product of:
          3.4641016 = tf(freq=12.0), with freq of:
            12.0 = termFreq=12.0
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.0625 = fieldNorm(doc=3175)
  0.25 = coord(1/4)

Abstract

Mit zunehmender Nutzung netzwerkbasierter Systeme und steigender internationaler Zusammenarbeit werden Informationsräume geschaffen, in denen unterschiedlich indexierte Informationsressourcen aus verschiedenen Ländern über das Internet frei zugänglich gemacht werden. Bedingt durch die Unterschiedlichkeit der verwendeten Erschließungsinstrumente in Sprache und Struktur gestaltet sich die thematische Recherche in diesen Informationsräumen umständlich und langwierig. Im Rahmen des von der Deutschen Forschungsgemeinschaft (DFG) geförderten und von der Deutschen Nationalbibliothek (DNB) in Kooperation mit der Fachhochschule Köln durchgeführten Projekts CrissCross wird ein multilinguales, thesaurusbasiertes und benutzergerechtes Recherchevokabular erstellt, das einen wesentlich effizienteren Zugriff auf heterogen erschlossene Informationsressourcen ermöglicht.

Source

Mitteilungen der Vereinigung Österreichischer Bibliothekarinnen und Bibliothekare. 61(2008) H.3, S.50-58

0.01802633 = product of:
  0.07210532 = sum of:
    0.07210532 = weight(_text_:headings in 336) [ClassicSimilarity], result of:
      0.07210532 = score(doc=336,freq=2.0), product of:
        0.33623707 = queryWeight, product of:
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.069292925 = queryNorm
        0.21444786 = fieldWeight in 336, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.8524013 = idf(docFreq=942, maxDocs=44421)
          0.03125 = fieldNorm(doc=336)
  0.25 = coord(1/4)

Abstract

The publication of library legacy includes publication of structuring vocabularies such as thesauri, classifications, subject headings. Different sources use different vocabularies, different in structure, width, depth and scope, and languages. Federated access to distributed data collections is currently possible if they rely on the same vocabularies. Mapping techniques and standards supporting them (such as SKOS mapping properties, OWL sameAs and equivalentClass) are still largely experimental, even in the linked data land. Libraries use a variety of controlled subject vocabulary and classification schemes to index items in their collections. Although most collections will employ only a single scheme, different schemes may be chosen to index different collections within a library or in separate libraries; schemes are chosen on the basis of language, subject focus (general or specific), granularity (specificity), user expectation, and availability and support (cost, currency, completeness, tools). For example, a typical academic library will operate separate metadata systems for the library's main collections, special collections (e.g. manuscripts, archives, audiovisual), digital collections, and one or more institutional repositories for teaching and research output; each of these systems may employ a different subject vocabulary, with little or no interoperability between terms and concepts. Users expect to have a single point-of-search in resource discovery services focussed on their local institutional collections. Librarians have to use complex and expensive resource discovery platforms to meet user expectations. Library communities continue to develop resource discovery services for consortia with a geographical, subject, sector (public, academic, school, special libraries), and/or domain (libraries, archives, museums) focus. Services are based on distributed searching (e.g. via Z39.50) or metadata aggregations (e.g. OCLC's WorldCat and OAISter). As a result, the number of different subject schemes encountered in such services is increasing. Trans-national consortia (e.g. Europeana) add to the complexity of the environment by including subject vocabularies in multiple languages. Users expect single point-of-search in consortial resource discovery service involving multiple organisations and large-scale metadata aggregations. Users also expect to be able to search for subjects using their own language and terms in an unambiguous, contextualised manner.

0.01786359 = product of:
  0.07145436 = sum of:
    0.07145436 = weight(_text_:und in 3782) [ClassicSimilarity], result of:
      0.07145436 = score(doc=3782,freq=20.0), product of:
        0.15368472 = queryWeight, product of:
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.069292925 = queryNorm
        0.4649412 = fieldWeight in 3782, product of:
          4.472136 = tf(freq=20.0), with freq of:
            20.0 = termFreq=20.0
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.046875 = fieldNorm(doc=3782)
  0.25 = coord(1/4)

Abstract

Ein Konferenzereignis der besonderen Art fand am 18. und 19. November 2010 in Luxemburg statt. Initiiert durch das Amt für Veröffentlichungen der Europäischen Union (http://publications.europa.eu) waren Bibliothekare und Information Professionals eingeladen, um über die Zukunft mehrsprachiger kontrollierter Vokabulare in Informationssystemen und insbesondere deren Beitrag zum Semantic Web zu diskutieren. Organisiert wurde die Konferenz durch das EuroVoc-Team, das den Thesaurus der Europäischen Union bearbeitet. Die letzte EuroVoc-Konferenz fand im Jahr 2006 statt. In der Zwischenzeit ist EuroVoc zu einem ontologie-basierten Thesaurusmanagementsystem übergegangen und hat systematisch begonnen, Semantic-Web-Technologien für die Bearbeitung und Repräsentation einzusetzen und sich mit anderen Vokabularen zu vernetzen. Ein produktiver Austausch fand mit den Produzenten anderer europäischer und internationaler Vokabulare (z.B. United Nations oder FAO) sowie Vertretern aus Projekten, die an Themen über automatische Indexierung (hier insbesondere parlamentarische und rechtliche Dokumente) sowie Interoperabilitiät zwischen Vokabularen arbeiten, statt.

Source

Information - Wissenschaft und Praxis. 62(2011) H.2/3, S.125-126

Theme

Konzeption und Anwendung des Prinzips Thesaurus

0.017613737 = product of:
  0.07045495 = sum of:
    0.07045495 = weight(_text_:und in 434) [ClassicSimilarity], result of:
      0.07045495 = score(doc=434,freq=28.0), product of:
        0.15368472 = queryWeight, product of:
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.069292925 = queryNorm
        0.45843822 = fieldWeight in 434, product of:
          5.2915025 = tf(freq=28.0), with freq of:
            28.0 = termFreq=28.0
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.0390625 = fieldNorm(doc=434)
  0.25 = coord(1/4)

Abstract

Eine einheitliche Sacherschließung in Deutschland wird durch die Vielzahl an vorhandenen und verwendeten Erschließungssystemen, Universal-, Fachklassifikationen und Fachthesauri erschwert. Den Benutzern von Bibliothekskatalogen oder Datenbanken fällt es daher schwer, themenspezifische Recherchen in heterogen erschlossenen Datenbeständen durchzuführen. In diesem Fall müssen die Nutzer derzeit nämlich den Umgang mit mehreren Erschließungsinstrumenten erlernen und verschiedene Suchanfragen anwenden, um das gewünschte Rechercheergebnis datenbankübergreifend zu erreichen. Um dem Benutzer einen einheitlichen Zugang zu heterogen erschlossenen Datenbeständen zu gewährleisten und gleichzeitig auch den Arbeitsaufwand für die Bibliothekare zu reduzieren, ist die Erstellung eines so genannten "Integrierten Retrievals" sinnvoll. Durch die Verknüpfung der unterschiedlichen Sacherschließungssysteme mit Hilfe von Konkordanzen wird es dem Nutzer ermöglicht, mit einem ihm vertrauten Vokabular eine sachliche Recherche in unterschiedlich erschlossenen Datenbeständen durchzuführen, ohne die spezifischen Besonderheiten der verschiedenen Erschließungsinstrumente kennen zu müssen. In dieser Arbeit sind exemplarisch drei Abbildungen für den Fachbereich der Bibliotheks- und Informationswissenschaften zwischen den für Deutschland wichtigsten Sacherschließungssystemen Dewey-Dezimalklassifikation (DDC), Regensburger Verbundklassifikation (RVK) und Schlagwortnormdatei (SWD) erstellt worden. Die Ergebnisse dieser Arbeit sollen einen ersten Überblick über spezifische Problemfelder und Möglichkeiten der hier erstellten Konkordanzen DDC - RVK, SWD - DDC und SWD - RVK liefern, um damit die Erstellung eines zukünftigen Recherchetools (und gegebenenfalls einer Klassifizierungshilfe) voranzutreiben. Die erstellten Konkordanzen liegen der Arbeit als Anhang bei.

Content

Bachelorarbeit im Studiengang Bibliotheks- und Informationsmanagement, Fakultät Information und Kommunikation, Hochschule der Medien Stuttgart

Imprint

Stuttgart : Hochschule der Medien / Fakultät Information und Kommunikation

0.017436711 = product of:
  0.069746844 = sum of:
    0.069746844 = weight(_text_:und in 716) [ClassicSimilarity], result of:
      0.069746844 = score(doc=716,freq=14.0), product of:
        0.15368472 = queryWeight, product of:
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.069292925 = queryNorm
        0.4538307 = fieldWeight in 716, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          2.217899 = idf(docFreq=13141, maxDocs=44421)
          0.0546875 = fieldNorm(doc=716)
  0.25 = coord(1/4)

Abstract

Erschließungsinstrumente erhöhen Effizienz und Effektivität thematischer Recherchen, indem sie standardisierte Zugänge zu Informationsressourcen bieten und mittels Ausweisung von Begriffsbeziehungen explorative Suchprozesse unterstützen. In heterogenen Informationsräumen ist ihre Funktionalität aufgrund der Unterschiedlichkeit der verwendeten Indexierungsdaten indes begrenzt. Die Herstellung von Verbindungen zwischen Dokumentationssprachen trägt dazu bei, dass das mit einem einzelnen Begriffssystem gegebene Potential über Teilmengen hinaus nutzbar wird. Welcher Mehrwert durch eine adäquate Einbindung derartiger Verknüpfungen in Retrievalapplikationen im Einzelnen erzielt werden kann, ist wesentlich abhängig von der zugrunde liegenden Methode der Heterogenitätsbehandlung und den berücksichtigten Charakteristika der jeweiligen Erschließungsinstrumente. Im Folgenden wird der vom DFG-Projekt CrissCross praktizierte Ansatz zur Herstellung von semantischer Interoperabilität zwischen der Schlagwortnormdatei (SWD) und der Dewey-Dezimalklassifikation (DDC) vorgestellt und sein Nutzen zur Unterstützung thematischer Suchprozesse aufgezeigt.

Source

Mitteilungen der Vereinigung Österreichischer Bibliothekarinnen und Bibliothekare. 62(2009) H.4, S.7-11