Fast Algorithms for Mining Association Rules in Large Databases
VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
Mining Frequent Quer Patterns from XML Queries
DASFAA '03 Proceedings of the Eighth International Conference on Database Systems for Advanced Applications
Rondo: a programming platform for generic model management
Proceedings of the 2003 ACM SIGMOD international conference on Management of data
The hyperion project: from data integration to data coordination
ACM SIGMOD Record
Relational data sharing in peer-based data management systems
ACM SIGMOD Record
Efficient query reformulation in peer data management systems
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
Querying XML,: XQuery, XPath, and SQL/XML in context (The Morgan Kaufmann Series in Data Management Systems) (The Morgan Kaufmann Series in Data Management Systems)
An XML Schema integration and query mechanism system
Data & Knowledge Engineering
PORSCHE: Performance ORiented SCHEma mediation
Information Systems
Double-layered schema integration of heterogeneous XML sources
Journal of Systems and Software
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This paper presents a novel mediation-based query answering approach which allows users (1) to reuse their own predefined queries to retrieve information properly from their local data source, and (2) to reformulate those queries in terms of remote data sources in order to obtain additional relevant information. The problem of structural diversity in XML design (e.g. nesting discrepancy and backward paths) makes it difficult to reformulate the queries. Therefore, we highlight the importance of precise query rewriting using composite concepts and relations of the mediated schema. Our experimental evaluations on real application datasets show that our approach effectively obtains correct answers over a broad diversity of schemas.