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Dagstuhl-Seminar 08391

Social Web Communities

( 21. Sep – 26. Sep, 2008 )

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Blogs, Wikis, and Social Bookmark Tools have rapidly emerged on the Web. The reasons for their immediate success are that people are happy to share information, and that these tools provide an infrastructure for doing so without requiring any specific skills. At the moment, there exists no foundational research for these systems, and they provide only very simple structures for organising knowledge. Individual users create their own structures, but these can currently not be exploited for knowledge sharing. The objective of the seminar was to provide theoretical foundations for upcoming Web 2.0 applications and to investigate further applications that go beyond bookmark- and file-sharing. The main research question can be summarized as follows: How will current and emerging resource sharing systems support users to leverage more knowledge and power from the information they share on Web 2.0 applications? Research areas like Semantic Web, Machine Learning, Information Retrieval, Information Extraction, Social Network Analysis, Natural Language Processing, Library and Information Sciences, and Hypermedia Systems have been working for a while on these questions. In the workshop, researchers from these areas came together to assess the state of the art and to set up a road map describing the next steps towards the next generation of social software.

Topic of the Seminar

Within the last two years, social software on the Web, such as Flickr, Delicious, Bibsonomy, Facebook, etc., has received a tremendous impact with regard to hundred of millions of users. A key factor to the success of social software tools in the Web is their grass-roots approach to sharing of information between users: there are no limitations on the kind of tags users may select. The resulting structures are often called ‘folksonomies’, that is, ‘taxonomies’ created by ‘folks’.

Such systems are also considered to realize aWeb version 2.0. The reason is that the initial use of the Web could be characterized by many users consuming what a comparatively small set of producers had developed, whereas with social software on the Web, everyone becomes a prosumer, i.e. someone who produces and consumes content. The success of this approach is visible with applications like flickr,4, which had approximately 250,000 users in April 2006. In the reference sharing systems CiteULike5 and Connotea,6 researchers and others insert, tag, and recommend scientific references in a shared knowledge space. This indicates a currently ongoing grass-root creation of knowledge spaces on the Web which is closely in line with “the 2010 goals of the European Union of bringing IST applications and services to everyone, every home, every school and to all businesses” .

The reason for the apparent success of the upcoming tools for web cooperation (wikis, blogs, etc.) and resource sharing (social bookmark systems, photo sharing systems, etc.) lies mainly in the fact that no specific skills are needed for publishing and editing. As these systems grow larger, however, the users will feel the need for more structure to better organize their resources and enhance search and retrieval. For instance, approaches for tagging tags, or for bundling them, are currently discussed on the corresponding news groups. We anticipate that resource sharing systems, together with wikis and blogs, are only first appearances of an emerging family of Web 2.0 tools.

  • Harith Alani (University of Southampton, GB) [dblp]
  • Andrea Baldassarri (Sapienza University of Rome, IT)
  • Alain Barrat (Centre de Physique Théorique - Marseille, FR) [dblp]
  • Vladimir Batagelj (University of Ljubljana, SI)
  • Christian Bauckhage (Fraunhofer IAIS - St. Augustin, DE) [dblp]
  • Dominik Benz (Universität Kassel, DE)
  • Christian Bizer (FU Berlin, DE) [dblp]
  • Andrea Capocci (Sapienza University of Rome, IT)
  • Ciro Cattuto (ISI Foundation, IT) [dblp]
  • Marko Grobelnik (Jozef Stefan Institute - Ljubljana, SI) [dblp]
  • Harry Halpin (University of Edinburgh, GB) [dblp]
  • Bettina Hoser (KIT - Karlsruher Institut für Technologie, DE)
  • Andreas Hotho (Universität Kassel, DE) [dblp]
  • Robert Jäschke (Universität Kassel, DE) [dblp]
  • Ulrike Lechner (Universität der Bundeswehr - München, DE) [dblp]
  • Alexander Löser (TU Berlin, DE) [dblp]
  • Nicolas Maisonneuve (Sony CSL - Paris, FR)
  • Alexander Mehler (Universität Frankfurt am Main, DE) [dblp]
  • Peter Mika (Yahoo Research - Barcelona, ES)
  • Dunja Mladenic (Jozef Stefan Institute - Ljubljana, SI) [dblp]
  • Claudia Müller (Universität Stuttgart, DE)
  • Ian Mulvany (Nature Publishing Group, GB)
  • Alexandre Passant (National University of Ireland - Galway, IE)
  • José Javier Ramasco (ISI Foundation, IT)
  • Valentin Robu (CWI - Amsterdam, NL)
  • Vito Domenico Pietro Servedio (Sapienza University of Rome, IT)
  • Sergej Sizov (Universität Koblenz-Landau, DE)
  • Steffen Staab (Universität Koblenz-Landau, DE) [dblp]
  • Gerd Stumme (Universität Kassel, DE) [dblp]
  • Martin Szomszor (University of Southampton, GB)
  • Dario Taraborelli (University of Surrey - Guildford, GB)

  • artificial intelligence / robotics
  • data bases / information retrieval
  • multimedia
  • web
  • society / HCI
  • complex systems

  • folksonomies
  • social bookmarking
  • emergent semantics
  • social network analysis