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Abstract

Teile und sammle könnte der moderne Leitspruch für das Phänomen Social Tagging heißen. Die freie und kollaborative Verschlagwortung digitaler Ressourcen im Internet gehört zu den Anwendungen aus dem Kontext von Web 2.0, die sich zunehmender Beliebtheit erfreuen. Der 2003 gegründete Social Bookmarking Dienst Del.icio.us und die 2004 entstandene Bildersammlung Flickr waren erste Anwendungen, die Social Tagging anboten und noch immer einen Großteil der Nutzer/innen an sich binden. Beim Blick in die Literatur wird schnell deutlich, dass Social Tagging polarisiert: Von Befürwortern wird es als eine Form der innovativen Wissensorganisation gefeiert, während Skeptiker die Dienste des Web 2.0 inklusive Social Tagging als globale kulturelle Bedrohung verdammen. Launischer Hype oder Quantensprung was ist dran am Social Tagging? Mit der Zielsetzung, mehr über die Erwartungen, Anwendungsbereiche und Nutzungsweisen zu erfahren, wurde im Frühjahr 2008 am Institut für Wissensmedien (IWM) in Tübingen ein Workshop der Gesellschaft für Medien in der Wissenschaft (GMW) durchgeführt. Die vorliegende Publikation fasst die Ergebnisse der interdisziplinären Veranstaltung zusammen.

Content

- Tagging im Semantic Web Benjamin Birkenhake: Semantic Weblog. Erfahrungen vom Bloggen mit Tags und Ontologien Simone Braun, Andreas Schmidt, Andreas Walter & Valentin Zacharias: Von Tags zu semantischen Beziehungen: kollaborative Ontologiereifung Jakob Voß: Vom Social Tagging zum Semantic Tagging Georg Güntner, Rolf Sint & Rupert Westenthaler: Ein Ansatz zur Unterstützung traditioneller Klassifikation durch Social Tagging Viktoria Pammer, Tobias Ley & Stefanie Lindstaedt: tagr: Unterstützung in kollaborativen Tagging-Umgebungen durch Semantische und Assoziative Netzwerke Matthias Quasthoff Harald Sack & Christoph Meinet: Nutzerfreundliche Internet-Sicherheit durch tag-basierte Zugriffskontrolle

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Abstract

This study explored how user-supplied tags can be applied to designing a thesaurus that reflects the unique features of image documents. Tags from the popular image-sharing Web site Flickr were examined in terms of two central components of a thesaurus-selected concepts and their semantic relations-as well as the features of image documents. Shatford's facet category and Rosch et al.'s basic-level theory were adopted for examining concepts to be included in a thesaurus. The results suggested that the best approach to Color and Generic category descriptors is to focus on basic-level terms and to include frequently used superordinate- and subordinate-level terms. In the Abstract category, it was difficult to specify a set of abstract terms that can be used consistently and dominantly, so it was suggested to enhance browsability using hierarchical and associative relations. Study results also indicate a need for greater inclusion of Specific category terms, which were shown to be an important tool in establishing related tags. Regarding semantic relations, the study indicated that in the identification of related terms, it is important that descriptors not be limited only to the category in which a main entry belongs but broadened to include terms from other categories as well. Although future studies are needed to ensure the effectiveness of this user-oriented approach, this study yielded promising results, demonstrating that user-supplied tags can be a helpful tool in selecting concepts to be included in a thesaurus and in identifying semantic relations among the selected concepts. It is hoped that the results of this study will provide a practical guideline for designing a thesaurus for image documents that takes into account both the unique features of these documents and the unique information-seeking behaviors of general users.

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Source

Metadata for semantic and social applications : proceedings of the International Conference on Dublin Core and Metadata Applications, Berlin, 22 - 26 September 2008, DC 2008: Berlin, Germany / ed. by Jane Greenberg and Wolfgang Klas