Flexible Databases Supporting Imprecision and Uncertainty

1. Front Matter

   Pages I-XV

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2. Database Models and Query Languages

   1. Front Matter

      Pages I-XV

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   2. Flexible Query Languages for Relational Databases: An Overview

      • Antonio Rosado, Rita A. Ribeiro, Slawomir Zadrozny, Janusz Kacprzyk

      Pages 3-53

   3. Vacuity-Oriented Generalized Yes/No Queries Addressed to Possibilistic Databases

      • Patrick Bosc, Olivier Pivert

      Pages 55-73

   4. On the Applicability of Extended Possibilistic Truth Values in Flexible Database Modelling and Querying

      • Guy de Tré, Rita de Caluwe

      Pages 75-90

   5. Preference based Quality Assessment and Presentation of Query Results

      • Stefan Fischer, Werner Kießling, Timotheus Preisinger

      Pages 91-121

   6. Modeling Fuzzy Information in the EER and Nested Relational Database Models

      • Zongmin M. Ma

      Pages 123-146

3. Database Integration

   1. Front Matter

      Pages I-XV

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   2. Querying Contradictory Databases by Taking into Account Their Reliability and Their Number

      • Laurence Cholvy

      Pages 149-168

   3. Database Integrations in Distributed Enterprise Information Systems: A Database Model with Imprecise Information and Query Processing

      • Li Yan

      Pages 169-192

   4. Integrating Data Doubtfully

      • Ander de Keijzer

      Pages 193-217

4. Semistructured Data Management

   1. Front Matter

      Pages I-XV

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   2. An Overview of Imperfection Representation in Semistructured Data

      • Matteo Magnani, Danilo Montesi

      Pages 221-239

   3. A Synopsis based Approach for XML Fast Approximate Querying

      • Sara Comai, Stefania Marrara, Letizia Tanca

      Pages 241-265

5. Spatial Databases

   1. Front Matter

      Pages I-XV

      PDF

   2. Maximum Entropy Inference for Geographical Information Systems

      • Hykel Hosni, Maria Vittoria Masserotti, Chiara Renso

      Pages 269-291

   3. Storage and Manipulation of Vague Spatial Objects Using Existing GIS Functionality

      • Arta Dilo, Pieter Bos, Pawalai Kraipeerapun, Rolf A. de By

      Pages 293-321

   4. Spatial SQL with Customizable Soft Selection Conditions

      • Gloria Bordogna, Marco Pagani, Giuseppe Psaila

      Pages 323-346

A more intuitive, easy and powerful representation, access, and retrieval of information is nowadays a necessary feature of information systems that have become a common instrument for a wide class of users in di?erent areas and for the most diversi?ed tasks. The management of imprecision and uncertainty in databases has become an important research area, which has known an impressive growth. This is testi?ed the increasing number of special sessions in international conferences and workshops devoted to this theme. Generally, this topic matured and developed independently within both the traditional database community and the community of researchers on fuzzy sets, and only very recently some joint initiatives have been undertaken. Since the Workshop titled “Supporting Imprecision and Uncertainty in Flexible DataBases” we organized within the DEXA Conference in Zaragoza on August 2004, our intent is to bring together a wide community of - searchers in the ?eld of databases, Information Retrieval, Spatial Information Systems, knowledge representation and multimedia, to share experiences and methods concerning the management of uncertainty and imprecision in da- bases. This volume collects a selected number of contributions of well known pioneerresearcheswho,atvariouslevels,proposedmodelsandtheapplication ofmethodstorepresentandmanageuncertaintyandimprecisionindatabases. Many approaches have been proposed in the literature on the modelling of uncertainty and imprecision in databases. To o?er a panoramic view of the methods proposed so far to students, researchers and insightful practitioners, we included in the volume survey chapters on classic topics such as ?exible querying in databases, and database models to represent imperfect data.

• Data Fusion
• Internet
• Soft Computing
• XML
• database
• databases
• fuzzy
• information system
• model
• modeling
• query processing
• relational database
• spatial database
• spatial information
• uncertainty

• CNR IDPA, National Research Council of Italy Institute for the Study of Environmental Process Dynamics, Dalmine, Italy

  Gloria Bordogna

• Faculty of Engineering, University of Bergamo, Dalmine, Italy

  Giuseppe Psaila

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