Database and Expert Systems Applications : 10th International Conference, DEXA'99, Florence, Italy, August 30 - September 3, 1999, Proceedings

The Database and Expert Systems Applications (DEXA) conferences bring together researchers and practitioners from all over the world to exchange ideas, experiences and opinions in a friendly and stimulating environment. The papers are at once a record of what has been achieved and the first steps towards shaping the future of information systems. DEXA covers a broad field, and all aspects of database, knowledge base and related technologies and their applications are represented. Once again there were a good number of submissions: 241 papers were submitted and of these the programme committee selected 103 to be presented. DEXA’99 took place in Florence and was the tenth conference in the series, following events in Vienna, Berlin, Valencia, Prague, Athens, London, Zurich, Toulouse and Vienna. The decade has seen many developments in the areas covered by DEXA, developments in which DEXA has played its part. I would like to express thanks to all the institutions which have actively supported and made possible this conference, namely: • University of Florence, Italy • IDG CNR, Italy • FAW – University of Linz, Austria • Austrian Computer Society • DEXA Association In addition, we must thank all the people who have contributed their time and effort to make the conference possible. Special thanks go to Maria Schweikert (Technical University of Vienna), M. Neubauer and G. Wagner (FAW, University of Linz). We must also thank all the members of the programme committee, whose careful reviews are important to the quality of the conference.

Invited Talk.- On Tractable Queries and Constraints.- Object-Orientation I.- Instances Evolution Vs Classes Evolution.- Dynamic Relationships in Object Oriented Databases: A Uniform Approach.- IFOOD: An Intelligent Object-Oriented Database Architecture.- An OODBMS-IRS Integration Based on a Statistical Corpus Extraction Method for Document Management.- Query Aspects I.- Controlled Hypertextual Navigation in the SgmlQL Language.- SECONDO/QP: Implementation of a Generic Query Processor.- Hybrid Simultaneous Scheduling and Mapping in SQL Multi-query Parallelization.- Cluster-Based Database Selection Techniques for Routing Bibliographic Queries.- Fundamentals for Applications I.- Developing Patterns as a Mechanism for Assisting the Management of Knowledge in the Context of Conducting Organisational Change.- Knowledge Acquisition for Mobile Robot Environment Mapping.- Text Understanding for Knowledge Base Generation in the SYNDICATE System.- Knowledge Discovery with the Associative Memory Modell Neunet.- Advanced Databases I.- Tracking Mobile Users Utilizing Their Frequently Visited Locations.- VPSF: A Parallel Signature File Technique Using Vertical Partitioning and Extendable Hashing.- A Case for Deltas in Business—to—Business Electronic Commerce.- Flexible Workflow Management Systems: An Approach Based on Generic Process Models.- Object-Orientation II.- Object-Based Ordered Delivery of Messages in Object-Based Systems.- Storage and Retrieval of XML Documents Using Object-Relational Databases.- Query Aspects II.- SQL/LPP: A Time Series Extension of SQL Based on Limited Patience Patterns.- A Knowledge Based Approach for Modeling and Querying Multidimensional Databases.- An Incremental Hypercube Approach for Finding Best Matches for Vague Queries.- Fundamentals for Applications II.- Formalising Ontologies and Their Relations.- Is this Argument Justified, Overruled or Defensible?.- Addressing Efficiency Issues During the Process of Integrity Maintenance.- Advanced Databases II.- Quality and Recommendation of Multi-Source Data for Assisting Technological Intelligence Applications.- Benchmarking Attribute Cardinality Maps for Database Systems Using the TPC-D Specifications.- Using Self-organizing Maps to Organize Document Archives and to Characterize Subject Matters: How to Make a Map Tell the News of the World.- Object-Orientation III.- Combining C-signature with Path Dictionary for Query Processing of Nested Objects in OODBS.- A CORBA Object-based Caching with Consistency.- From Object-Oriented Conceptual Modeling to Component-Based Development.- Query Aspects III.- Query Processing in Relationlog.- Rewriting Queries using Views.- A Query Subsumption Technique.- Fundamentals for Applications III.- A Conference Key Multicasting Scheme Using Knapsack and Secret Sharing.- Verify Updating Trigger Correctness.- A Flexible Weighting Scheme for Multimedia Documents.- Advanced Databases III.- A Fast Method for Ensuring the Consistency of Integrity Constraints.- A Mechanism for Deriving Specifications of Security Functions in the Common Criteria Framework.- Object-Orientation IV.- Efficient Retrieval of Structured Documents from Object-Relational Databases.- Analysis of Active Database Rules Behaviour Using Rewriting Logic.- Parallel Object Server - Architecture and Performance.- Using Contextual Fuzzy Views to Query Imprecise Data.- Using Contextual Fuzzy Views to Query Imprecise Data.- Combining Pat-Trees and Signature Files for Query Evaluation in Document Databases.- Combining Pat-Trees and Signature Files for Query Evaluation in Document Databases.- Answering Queries by Semantic Caches.- Answering Queries by Semantic Caches.- Fundamentals for Applications IV.- Simulating the Interaction of Database Agents.- Automatic and Semantic Techniques for Scheme Integration and Scheme Abstraction.- Dialogue Management in a Virtual College.- Advanced Databases IV.- Meta Data Based EDI for Small Enterprises.- Database Challenges for Genome Information in the Post Sequencing Phase Moussouni.- Supporting Teams in Virtual Organizations.- Object-Orientation V.- If We Refuse the Inheritance.- Viewpoints Handling in an Object Model with Criterium-Based Classes.- Query Aspects V.- The Constructive Method for Query Containment Checking.- On the Specification of Representation-Based Conditions in a Context of Incomplete Databases.- Fundamentals for Applications V.- Methods and Interpretation of Database Summarisation.- An Efficient Scalable Parallel View Maintenance Algorithm for Shared Nothing Multi-processor Machines.- Using Back Propagation Algorithm and Genetic Algorithm to Train and Refine Neural Networks for Object Detection.- Advanced Databases V.- An Adaptive, Maintainable, Extensible Process Agent.- Metadata, a “Semantic” Approach.- Heterogeneous, Distributed and Federated Database Systems I.- HEROSfw: A Framework for Heterogeneous Database Systems Integration.- Resolving Ontological Heterogeneity in the KRAFT Project.- Generation of Conceptual Wrappers for Legacy Databases.- Transactions I.- Design and Implementation of Linear Hash Algorithm in a Nested Transaction Environment.- Supporting Partial Isolation in Flat Transactions.- Applications I.- Using a Similarity Measurement to Partition a Vocabulary of Medical Concepts.- A Study on Musical Features for Melody Databases.- Using Multimedia in Aeronautical Technical Documentation.- Data-Warehousing and Data-Mining I.- Invited Talk: Data Warehouse Design and Maintenance through View Normalizaiton.- Cleansing Data for Mining and Warehousing.- DROLAP - A Dense-Region Based Approach to On-Line Analytical Processing.- Heterogeneous, Distributed and Federated Database Systems II.- Availability and Reliability Issues in Distributed Databases Using Optimal Horizontal Fragmentation.- Object Clustering Methods and a Query Decomposition Strategy for Distributed Object-Based Information Systems.- Dynamic Adjustment of Localized Constraints.- Solent - A Platform for Distributed Open Hypermedia Applications.- Transactions II.- Concurrency Control for Global Transaction Management in MDBSs.- Transactional Computation.- Database Versions to Represent Bitemporal Databases.- Applications II.- A Case Study in Information Delivery to Mass Retail Markets.- Towards a Scalable System Architecture in Digital Libraries.- MOSAIC: A Multi-feature Access Method for Large Image Databases.- Data-Warehousing and Data-Mining II.- Enhancing Data Warehousing with Fuzzy Technology.- Mining Several Databases with an Ensemble of Classifiers.- WebTool: An Integrated Framework for Data Mining.- Heterogeneous, Distributed and Federated Database Systems III.- Local and Federated Database Schemas Evolution. An Impact Propagation Model.- Adaptive Caching Management for Multimedia Suppor.- An Approach Towards Virtual Global Information Systems.- Transactions III.- Transaction Shipping Approach for Mobile Distributed Real-Time Databases.- Distributed Global Transaction Support for Workflow Management Applications.- Spatial Aspects I.- Update Propagation of Replicated Data in Distributed Spatial Databases.- Split Algorithms for Sets of High-Dimensional Objects.- Spatio-Temporal Multimedia Presentations as Database Objects.- World Wide Web Applications I.- WWW Bookmark Modeling and Visualization: A Fuzzy Based Approach.- PTA - A Personal Translation Assistant for Accessing the World Wide Web.- Temporal Aspects.- Reasoning about Events with Imprecise Location and Multiple Granularities.- Effective Temporal Aggregation Using Point-Based Trees.- Temporal Indexing with Multidimensional File Structures.- Communicating Time-Oriented, Skeletal Plans to Domain Experts Lucidly.- Spatial Aspects II.- More BANG for Your Buck: A Performance Comparison of BANG and R* Spatial Indexing.- A High-Performance Spatial Storage System Based on Main-Memory Database Architecture.- World Wide Web Applications II.- On the Feasibility of Website Refresh Queries.- Building CyberBroker in Digital Marketplaces Using Java and CORBA.- Invited Talk.- Experiments in Adaptable and Secure Multimedia Database Systems (Invited Paper).