Search (19 results, page 1 of 1)

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Abstract

Efforts towards internationalization have become increasingly important in scientific environments. As for content-based indexing of scientific research data, however, standards leading to internationally coherent indexing which is vital for retrieval purposes are not yet sufficiently developed. Even concerning the concrete use of indexing instruments, launched by initiatives on an international scale, there are still no binding policies and guidelines. Against this backdrop, essential criteria which internationally applicable indexing systems should meet will be outlined. These will be illustrated through the multilingual European Language Social Science Thesaurus (ELSST), originally based on the UK Data Archive's (UKDA) Humanities and Social Science Electronic Thesaurus (HASSET) and ultimately developed by the Council of European Social Science Data Archives (CESSDA). Additionally, the general pros and cons of using international versus national indexing languages will be weighed using the ELSST and the Thesaurus for the Social Sciences (TSS) developed by GESIS - Leibniz-Institute for the Social Sciences. In this light, the benefit of vocabulary crosswalks for supporting a combined use of international and national indexing systems will be discussed.

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Date

17. 1.2019 19:04:22

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Source

Wissensspeicher in digitalen Räumen: Nachhaltigkeit - Verfügbarkeit - semantische Interoperabilität. Proceedings der 11. Tagung der Deutschen Sektion der Internationalen Gesellschaft für Wissensorganisation, Konstanz, 20. bis 22. Februar 2008. Hrsg.: J. Sieglerschmidt u. H.P.Ohly

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Abstract

International standard ISO 25964-1:2011 - Thesauri for information retrieval, includes a detailed data model for thesaurus structure. It is intended to provide a rigorous presentation of the elements and relationships which will not only clarify and standardise the varying and conflicting interpretations which exist but which can also be implemented consistently in automated systems. It makes a clear distinction between concepts and the terms which are used to label them, and includes other features that may be present in a thesaurus, such as compound equivalence, arrays and node labels, concept groups, notes and version history.

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Abstract

In this paper, we describe in detail the Information Content Evaluation Map (ICE-Map Visualization, formerly referred to as IC Difference Analysis). The ICE-Map Visualization is a visual data mining approach for all kinds of concept hierarchies that uses statistics about the concept usage to help a user in the evaluation and maintenance of the hierarchy. It consists of a statistical framework that employs the the notion of information content from information theory, as well as a visualization of the hierarchy and the result of the statistical analysis by means of a treemap.

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Date

24. 8.2016 14:03:22

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Abstract

Thesauri have triumphed in many domains that require precise and exhaustive information because of their representational power, their capability to integrate the concept-based and alphabetical approaches to organizing information, and their standardization and, more recently, formalization. Nevertheless, there is room to improve their relevance in the digital age by embracing the open linked data initiatives and by taking advantage of their structural and functional proximity to some of the big collaborative knowledge repositories in the Internet, notably the Wikipedia environment. With a focus on its implications for enhanced interoperability, this structural proximity is analysed, and the benefits of such collaboration for the different potential stakeholders are considered. It is proposed that better devices for ensuring semantic browsing are provided when necessary, and that an open hub for thesauri interconnection is developed, perhaps using existing big open Internet semantic facilities, such as Wikipedia.

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Abstract

A thesaurus contains a set of terms or features that may be used to represent recorded information, including prose documents or scientific data sets. The focus of this work is on the basic structural nature of a thesaurus itself, not on how people develop a thesaurus or how a thesaurus effects retrieval performance. Thesauri in this research are automatically developed in a simulation from sets of randomly or exhaustively generated documents. Each thesaurus is generated by the Thesaurus Generator software from a set of several hundred documents, and thousands of different document sets are used as input to the Thesaurus Generator, producing thousands of thesauri. Thus, thousands of thesauri are generated for each data point in accompanying graphs. The characteristics of this large number of thesauri are studied so that the relationships between thesaurus parameters can be determined. Some rules governing these relationships are suggested, addressing factors such as tree height and width, number of tree roots in thesauri, and number of terms available for the vocabulary. How these parameters scale as vocabularies grow is addressed. These results apply to various information systems that contain features with hierarchical relationships, including many thesauri and ontologies.

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Abstract

iQvoc is a new open source SKOS-XL vocabulary management tool developed by the Federal Environment Agency, Germany, and innoQ Deutschland GmbH. Its immediate purpose is maintaining and publishing reference vocabularies in the upcoming Linked Data cloud of environmental information, but it may be easily adapted to host any SKOS- XL compliant vocabulary. iQvoc is implemented as a Ruby on Rails application running on top of JRuby - the Java implementation of the Ruby Programming Language. To increase the user experience when editing content, iQvoc uses heavily the JavaScript library jQuery.

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Abstract

Thesauri are frequently stated or indirectly treated as subtype of ontologies or vice versa while other definitions explicitly distinguish them. To encounter the lack of clarity this paper provides an in-depth comparison of these types of models. The comparison followed a semiotic approach and considered syntactic, semantic and pragmatic differences between ontologies and thesauri. For the comparison data models of thesauri and ontologies were produced that - in contrast to existing meta- and datamodels - are comparable with each other. The analysis revealed significant differences in the semiotic aspects of thesauri and ontologies. This finding challenges the treatment of ontologies and thesauri as type of one another. The comparison presented in this paper shall also provide input for standardization efforts in clarifying the relatedness of thesauri and ontologies.

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Abstract

ISO 25964-1 ist der neue internationale Standard für Thesauri. Die Norm ersetzt ISO 2788 und ISO 5964. Erschienen unter dem vollständigen Titel "Information and documentation -Thesauri and interoperability with other vocabularies - Part 1: Thesauri for information retrieval" berücksichtigt ISO 25964-1 einsprachige und mehrsprachige Thesauri sowie die heutigen Anforderungen an Interoperabilität, Networking und die gemeinsame Nutzung von Daten (Data Sharing). Im Standard sind folgende Themen enthalten: - Erstellung einsprachiger und mehrsprachiger Thesauri; - Klärung des Unterschieds zwischen Benennungen und Begriffen und ihrer Beziehungen zueinander; - Richtlinien zur Facettenanalyse, zur Gestaltung und Darstellung von Thesauri; - Richtlinien zur Thesaurusnutzung in computergestützten und vernetzten Systemen; Best-Practice-Modell für Management der Thesaurusentwicklung und -wartung; - Leitfaden Thesaurusverwaltungssoftware; - Datenmodell für ein- und mehrsprachige Thesauri; - zusammengefasste Empfehlungen für Austauschformate und -protokolle. Aus dem Datenmodell wurde ein XML-Schema für Datenaustauschzwecke erstellt, das frei verfügbar ist unter http://www.niso.org/schemas/iso25964/.

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Abstract

In der elektronischen Kommunikationsumgebung von Bibliotheken existiert eine Vielfalt von Informationsressourcen in jeglicher Form, die hochaktuell und dank Discoverysystemen größtenteils inhaltlich vollständig durchsuchbar sind. Vor diesem informationstechnischen Hintergrund zeigt sich die erstaunliche Stärke von tradierten Erschließungsinstrumenten. Allerdings endet der Mehrwert dieser sacherschließenden Metadaten dort, wo bibliothekarische Daten aufhören. Die intellektuell basierte Verschlagwortung kann aufgrund der stetig anwachsenden Datenmenge aus unterschiedlichen Informationsräumen nicht mehr bewältigt werden. Für den Einsatz eines kontrollierten Vokabulars, welches semantische Kontextinformationen transportieren kann und automatisierte Verfahren dank entsprechender Datenmodellierung unterstützt, ist ein Thesaurus das Mittel der Wahl. Der Artikel gibt einen Überblick über den Mehrwert von Thesauri in Discoverysystemen, beschreibt den Vorgang der Thesauruserstellung mit dem Schwerpunkt der Auswahl von Vokabularmanagementsystemen im Linked-Data-Kontext und stellt die verschiedenen Ansätze der Integration eines Thesaurus in das vor Ort verwendete Discoverysystem WILBERT vor.

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Abstract

A video game's plot is one of its defining features, and prior research confirms the importance of plot metadata to users through persona analysis, interviews, and surveys. However, existing organizational systems, including library catalogs, game-related websites, and traditional plot classification systems, do not adequately describe the plot information of video games, in other words, what the game is really about. We attempt to address the issue by creating a controlled vocabulary based on a domain analysis involving a review of relevant literature and existing data structures. The controlled vocabulary is constructed in a pair structure for maximizing flexibility and extensibility. Adopting this controlled vocabulary for describing plot information of games will allow for useful search and collocation of video games.

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Abstract

This paper gives an overview of the history, development, and structure of the electronic thesauri produced and maintained by the Getty Research Institute (GRI). We describe the evolution of the Art & Architecture Thesaurus (AAT®), the Getty Thesaurus of Geographic Names (TGN®), and the Union List of Artist Names (ULAN®) as multilingual, cross-cultural knowledge organization systems (KOS); the factors that make them unique; and their potential, when expressed as Linked Open Data (LOD) to play a key role in the Semantic Web.

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Abstract

The recent ISKO-UK conference considered the question of whether the traditional thesaurus has any place in modern information retrieval. This note is intended to continue in the spirit of that good-natured debate, arguing that there is indeed a role today and highlighting some recent work showing the continued relevance of the thesaurus, particularly in the linked data area. Key functionality that a thesaurus makes possible is discussed. A brief outline is provided of prominent work hat employs thesauri in three key areas of infrastructure underpinning advanced retrieval functionality today: metadata enrichment,vocabulary mapping and web services.

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Abstract

This paper illustrates the changing role of thesauri interlinked with overall changes of modern information infrastructure services, referring to "STW Thesaurus for Economics" as a case study. It starts with an overview of the history and development of the STW and describes the far-reaching changes brought about by its publication on the Web, with regard to subject indexing, retrieval and new uses for Linked Open Data. It argues that only the most recent technological developments help thesauri to exploit their full potential which is why they more than ever have a place in current information retrieval and infrastructure.

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Source

Semantic keyword-based search on structured data sources: COST Action IC1302. Second International KEYSTONE Conference, IKC 2016, Cluj-Napoca, Romania, September 8-9, 2016, Revised Selected Papers. Eds.: A. Calì, A. et al

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Abstract

In the post-war period before computers were readily available, urgent demand for scientific and industrial develop-ment stimulated research and development (R&D) that led to the birth of the information retrieval thesaurus. This article traces the early history, speciation and progressive improvement of the thesaurus to reach the state now conveyed by guidelines in inter-national and national standards. Despite doubts about the effec-tiveness of the thesaurus throughout this period, and notwith-standing the dominance of Google and other search engines in the information retrieval (IR) scene today, the thesaurus still plays a complementary part in the organization of knowledge and in-formation resources. Success today depends on interoperability, and is opening up opportunities in linked data applications. At the same time, the IR demand from workers in the knowledge society drives interest in hybrid forms of knowledge organization system (KOS) that may pool the genes of thesauri with those of ontologies and classification schemes.

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Abstract

The information retrieval thesaurus emerged in the 1950s, settled down to a more-or-less standard format in the 1970s and has continued to evolve marginally since then. Throughout its whole lifetime, doubts have been expressed about its efficacy with emphasis latterly on cost-effectiveness. Prolonged testing of different styles of index language in the 1970s failed to settle the doubts. The arena occupied by the debate has moved from small isolated databases in the post-war era to diverse situations nowadays with the whole Internet at one extreme and small in-house collections at the other. Sophisticated statistical techniques now dominate the retrieval landscape on the Internet but leave opportunities for the thesaurus and other knowledge organization techniques in niches such as image libraries and corporate intranets. The promise of an ontology-driven semantic web with linked data resources opens another opportunity. Thus much scope remains for research to establish the usefulness of the thesaurus in these places and to inspire its continuing evolution.