Proceedings of the Fourth Workshop on Semantic Wikis – The Semantic Wiki Web 6th European Semantic Web Conference Hersonissos, Crete, Greece, June 2009 edited by Christoph Lange June 1, 2009 Preface Dear Reader, after a successful year, the semantic wiki community is meeting again to have their 4th workshop. A lot has happened after the previous workshop: People have invested further research and development into existing systems to make them more mature: Three out of 15 presentations in this workshop are about evolutions of systems presented in 2008. The community has further grown and become aware of new application areas, mainly thanks to the Ontolog teleconference series on semantic wikis1. Another indication of maturity is that, while research is still as creative and dynamic as ever, implementation of semantic wiki technologies largely concentrates on few successful platforms that are extensible by plugins, most notably (Semantic) MediaWiki and KiWi (8 out of 15 talks in this workshop). And these technologies are not necessarily limited to wikis. Using a wiki is not an end in itself, but, depending on the application, any semantic social software will get the task done: Systems that are no longer called “wikis” have adopted key principles of wikis, such as ubiquitous interlinking and easy collaboration. Thus, the semantic wiki community is giving their findings back into the larger Semantic Web. In 2006, when our first workshop took place, many semantic web researchers jumped onto the semantic wiki bandwagon, as they were hip. Now, semantic wikis rather serve as incubators for testing and evaluating new approaches and technologies in a manageable setting, before releasing them to the Semantic Web. We wish to thank all authors and reviewers who spent their nights and days con- tributing to this topic and thereby made this workshop possible. Many thanks also to the ESWC organisation team, which set the stage for this workshop as one out of 8. Let us continue to bring the lively wiki spirit to the Semantic Web and enjoy reading the proceedings. Bremen, June 2009 Christoph Lange, Sebastian Schaffert, Hala Skaf-Molli and Max Völkel 1http://ontolog.cim3.net/cgi-bin/wiki.pl?SemanticWiki iii Contents Preface iii Programme vi How Controlled English can Improve Semantic Wikis Tobias Kuhn 1 Poster (AceWiki – Natural, Usable, Expressive, Understandable) . 16 Information Extraction in Semantic Wikis Pavel Smrz and Marek Schmidt 17 Undo in Peer-to-peer Semantic Wikis Charbel Rahhal, Stéphane Weiss, Hala Skaf-Molli, Pascal Urso, and Pascal Molli 30 Enabling cross-wikis integration by extending the SIOC ontology Fabrizio Orlandi and Alexandre Passant 45 What the User Interacts With: Reflections on Conceptual Models for Semantic Wikis François Bry, Michael Eckert, Jakub Kotowski, and Klara Weiand 60 Combining Unstructured, Fully Structured and Semi-Structured Information in Semantic Wikis Rolf Sint, Stephanie Stroka, Sebastian Schaffert and Roland Ferstl 73 WIKITAAABLE: A semantic wiki as a blackboard for a textual case-base reason- ing system Amélie Cordier, Jean Lieber, Pascal Molli, Emmanuel Nauer, Hala Skaf-Molli and Yannick Toussaint 88 Engineering on the Knowledge Formalization Continuum Joachim Baumeister, Jochen Reutelshöfer, and Frank Puppe 102 MoKi: the Modelling wiKi Marco Rospocher, Chiara Ghidini, Viktoria Pammer, Luciano Serafini, and Stefanie Lindstaedt 113 Poster . 128 iv Brede Wiki: Neuroscience data structured in a wiki Finn Årup Nielsen 129 Poster . 134 Metasocial Wiki – Towards an interlinked knowledge in a decentralized social space Amparo E. Cano, Matthew Rowe, and Fabio Ciravegna 136 Analysis of Tag-Based Recommendation Performance for a Semantic Wiki Frederico Durão and Peter Dolog 141 An Extensible Semantic Wiki Architecture Jochen Reutelshöfer, Fabian Haupt, Florian Lemmerich, and Joachim Baumeis- ter 155 Poster (KnowWE – Knowledge Formalization in the Age of Wikis) . 170 KiWi – A Platform for Semantic Social Software Sebastian Schaffert, Julia Eder, Szaby Grünwald, Thomas Kurz, Mihai Rad- ulescu, Rolf Sint and Stephanie Stroka 171 VPOET Templates to Handle the Presentation of Semantic Data Sources in Wikis Mariano Rico, David Camacho and Oscar Corcho 186 v Programme 09:00 – 10:30 Session 1: Lightning panels 09:00 – 09:15 Opening Ceremony Christoph Lange, Sebastian Schaffert, Hala Skaf-Molli, and Max Völkel Lightning panels: a group of short talks on related topics, 10 min. per full paper, 5 min. per short paper, followed≈ by a joint discussion (5 min. per paper) 09:15 – 09:45 Language Processing How Controlled English can Improve Semantic Wikis (Best Paper) Tobias Kuhn Information Extraction in Semantic Wikis Pavel Smrz and Marek Schmidt —discussion— 09:45 – 10:30 Wiki Architectures Undo in Peer-to-peer Semantic Wikis Charbel Rahhal, Stéphane Weiss, Hala Skaf-Molli, Pascal Urso, and Pascal Molli Enabling cross-wikis integration by extending the SIOC ontol- ogy Fabrizio Orlandi and Alexandre Passant What the User Interacts With: Reflections on Conceptual Mod- els for Semantic Wikis François Bry, Michael Eckert, Jakub Kotowski, and Klara Weiand —discussion— 10:30 – 11:00 Coffee Break vi 11:00 – 13:00 Session 2: Lightning Panels 11:00 – 11:30 Knowledge Representation and Reasoning Combining Unstructured, Fully Structured and Semi- Structured Information in Semantic Wikis Rolf Sint, Stephanie Stroka, Sebastian Schaffert and Roland Ferstl WIKITAAABLE: A semantic wiki as a blackboard for a textual case-base reasoning system Amélie Cordier, Jean Lieber, Pascal Molli, Emmanuel Nauer, Hala Skaf-Molli and Yannick Toussaint Engineering on the Knowledge Formalization Continuum Joachim Baumeister, Jochen Reutelshöfer, and Frank Puppe —discussion— 11:30 – 11:55 Applications MoKi: the Modelling wiKi Marco Rospocher, Chiara Ghidini, Viktoria Pammer, Luciano Serafini, and Stefanie Lindstaedt Brede Wiki: Neuroscience data structured in a wiki Finn Årup Nielsen —discussion— 11:55 – 12:15 Social Software Metasocial Wiki – Towards an interlinked knowledge in a de- centralized social space Amparo E. Cano, Matthew Rowe, and Fabio Ciravegna Analysis of Tag-Based Recommendation Performance for a Se- mantic Wiki Frederico Durão and Peter Dolog —discussion— 12:15 – 12:50 Platforms and Plugins An Extensible Semantic Wiki Architecture Jochen Reutelshöfer, Fabian Haupt, Florian Lemmerich, and Joachim Baumeister KiWi – A Platform for Semantic Social Software Sebastian Schaffert, Julia Eder, Szaby Grünwald, Thomas Kurz, Mihai Radulescu, Rolf Sint and Stephanie Stroka VPOET Templates to Handle the Presentation of Semantic Data Sources in Wikis Mariano Rico, David Camacho and Oscar Corcho —discussion— 12:50 – 13:00 Wrapping up the talks, preparing the Demo Session 13:00 – 14:30 Lunch vii 14:30 – 15:10 Session 3: Keynote Semantic Wikis for Software Knowledge Management Josef Holy, Sun, Prague —discussion— 15:10 – 16:00 Session 4: Demo Session (demos listed in the order of the morning talks) AceWiki: Controlled English Tobias Kuhn Information Extraction in KiWi Pavel Smrz and Marek Schmidt Peer-to-peer Undo in Swooki Charbel Rahhal, Stéphane Weiss, Hala Skaf-Molli, Pascal Urso, and Pascal Molli SIOC-MediaWiki Exporter Fabrizio Orlandi and Alexandre Passant Case-based Reasoning in WIKITAAABLE Amélie Cordier, Jean Lieber, Pascal Molli, Emmanuel Nauer, Hala Skaf-Molli and Yannick Toussaint MoKi: the Modelling wiKi Marco Rospocher, Chiara Ghidini, Viktoria Pammer, Luciano Serafini, and Stefanie Lindstaedt Brede Wiki: Neuroscience data structured in a wiki Finn Årup Nielsen Tag-Based Recommendation in KiWi Frederico Durão and Peter Dolog The KnowWE Architecture Jochen Reutelshöfer, Fabian Haupt, Florian Lemmerich, and Joachim Baumeister KiWi – A Platform for Semantic Social Software Sebastian Schaffert, Julia Eder, Szaby Grünwald, Thomas Kurz, Mihai Radulescu, Rolf Sint and Stephanie Stroka VPOET Templates to Handle the Presentation of Semantic Data Sources in Wikis Mariano Rico, David Camacho and Oscar Corcho 16:00 – 16:30 Coffee Break (poster/demo session open to visitors) viii 16:30 – 18:00 Session 5: Interactive 16:30 – 16:50 Problem Presentation 16:50 – 17:35 Teamwork 17:35 – 17:55 Presentation of results 17:55 – 18:00 Concluding Remarks 18:30 – 19:30 LarKC Reception 20:45 SemWiki 2009 Social Event Organisation Christoph Lange • Sebastian Schaffert • Hala Skaf-Molli • Max Völkel • ix x How Controlled English can Improve Semantic Wikis Tobias Kuhn Department of Informatics & Institute of Computational Linguistics, University of Zurich, Switzerland [email protected] http://www.ifi.uzh.ch/cl/tkuhn Abstract. The motivation of semantic wikis is to make acquisition, maintenance, and mining of formal knowledge simpler, faster, and more flexible. However, most existing semantic wikis have a very technical in- terface and are restricted to a relatively low level of expressivity. In this paper, we explain how AceWiki uses controlled English — concretely At- tempto Controlled English (ACE) — to provide a natural and intuitive interface while supporting a high degree of expressivity. We introduce re- cent improvements of the AceWiki system and user studies that indicate that AceWiki is usable and useful. 1 Introduction We present an approach how semantic wikis and controlled natural language can be brought together. This section gives a short introduction into the fields of semantic wikis and controlled natural languages. 1.1 Semantic Wikis Semantic wikis are a relatively new field of research that started in 2004 when semantic wikis were introduced in [16] describing