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08421 Working Group: Classification, Representation and Modeling Das Sarma, Anish de Keijzer, Ander Deshpande, Amol Haas, Peter J. Ilyas, Ihab F. Koch, Christoph Neumann, Thomas Olteanu, Dan Theobald, Martin Vassalos, Vasilis This report briefly summarizes the discussions carried out in the working group on classification, representation and modeling of uncertain data. The discussion was divided into two subgroups: the first subgroup studied how different representation and modeling alternatives currently proposed can fit in a bigger picture of theory and technology interaction, while the second subgroup focused on contrasting current system implementations and the reasons behind such diverse class of available prototypes. We summarize the findings of these two groups and the future steps suggested by group members. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Anish Das Sarma and Ander de Keijzer and Amol Deshpande and Peter J. Haas and Ihab F. Ilyas and Christoph Koch and Thomas Neumann and Dan Olteanu and Martin Theobald and Vasilis Vassalos 2009 Is Part Of Dagstuhl Seminar Proceedings, Volume 8421, Uncertainty Management in Information Systems (2009) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/DagSemProc.08421.3 urn:nbn:de:0030-drops-19410 https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.08421.3 eng https://creativecommons.org/licenses/by/4.0/legalcode