By Hans-Jörg Schek (auth.), Christian S. Jensen, Simonas à altenis, Keith G. Jeffery, Jaroslav Pokorny, Elisa Bertino, Klemens Böhn, Matthias Jarke (eds.)

ISBN-10: 3540433244

ISBN-13: 9783540433248

ISBN-10: 354045876X

ISBN-13: 9783540458760

This ebook constitutes the refereed lawsuits of the eighth overseas convention on Extending Database know-how, EDBT 2002, held in Prague, Czech Republic, in March 2002.
The 36 revised complete papers awarded including six commercial and alertness papers, thirteen software program demos and one invited paper have been rigorously reviewed and chosen from a complete of 207 submissions. The papers are prepared in topical sections on question transformation, info mining, XML, complex question processing, relocating items, dispensed facts, allotted processing, complex querying, XML-advanced querying, basic question companies, estimation/histograms, and aggregation.

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Extra info for Advances in Database Technology — EDBT 2002: 8th International Conference on Extending Database Technology Prague, Czech Republic, March 25–27, 2002 Proceedings

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00”. We browsed the entire collection and constructed a set of relevant results (ground truth) for the query, we found 10 items out of 1747 to be relevant and included them in the ground truth. Several ways exist to express this query, we try the following: 1. 00”. 2. 00” and gender as male. 3. 00. 4. 00, and pick a picture of a red jacket which will include the image features for search. We ran all four queries with feedback and evaluate the effectiveness of refinement comparing tuple versus column level feedback using precision and recall.

36 Jan Chomicki Preferences are defined using binary preference relations between tuples. Preference relations are specified using first-order formulas. We focus mostly on intrinsic preference formulas. Such formulas can refer only to built-in predicates. In that way we capture preferences that are based only on the values occuring in tuples, not on other properties like membership of tuples in database relations. We show how the latter kind of preferences, called extrinsic, can also be simulated in our framework in some cases.

DAAL01-96-2-0003. Michael Ortega-Binderberger is supported in part by CONACYT award 89061. S. Jensen et al. ): EDBT 2002, LNCS 2287, pp. 15–33, 2002. c Springer-Verlag Berlin Heidelberg 2002 16 Michael Ortega-Binderberger, Kaushik Chakrabarti, and Sharad Mehrotra The initial result ranking computed in response to a query may not adequately capture the users preconceived notion of similarity or information need [4], prompting the user to refine the query. The gap between the actual and desired rankings is due to the subjective perception of similarity by users on one hand, and the difficulty to express similarity queries that accurately capture the users information need on the other.

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Advances in Database Technology — EDBT 2002: 8th International Conference on Extending Database Technology Prague, Czech Republic, March 25–27, 2002 Proceedings by Hans-Jörg Schek (auth.), Christian S. Jensen, Simonas à altenis, Keith G. Jeffery, Jaroslav Pokorny, Elisa Bertino, Klemens Böhn, Matthias Jarke (eds.)


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