CLASSIC: a structural data model for objects
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
SIMS: Retrieving and integrating information from multiple sources
SIGMOD '93 Proceedings of the 1993 ACM SIGMOD international conference on Management of data
A softbot-based interface to the Internet
Communications of the ACM
WordNet: a lexical database for English
Communications of the ACM
Infomaster: an information integration system
SIGMOD '97 Proceedings of the 1997 ACM SIGMOD international conference on Management of data
Combining Horn rules and description logics in CARIN
Artificial Intelligence
Object Exchange Across Heterogeneous Information Sources
ICDE '95 Proceedings of the Eleventh International Conference on Data Engineering
Information Integration: The MOMIS Project Demonstration
VLDB '00 Proceedings of the 26th International Conference on Very Large Data Bases
Views in a Large Scale XML Repository
Proceedings of the 27th International Conference on Very Large Data Bases
Querying Heterogeneous Information Sources Using Source Descriptions
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
Answering Queries Using Views over Description Logics Knowledge Bases
Proceedings of the Seventeenth National Conference on Artificial Intelligence and Twelfth Conference on Innovative Applications of Artificial Intelligence
Answering queries using views: A survey
The VLDB Journal — The International Journal on Very Large Data Bases
Semantic integration in Xyleme: a uniform tree-based approach
Data & Knowledge Engineering - Special issue: Data integration over the Web
COOPIS '96 Proceedings of the First IFCIS International Conference on Cooperative Information Systems
Wildcards for lightweight information integration in virtual desktops
Proceedings of the 17th ACM conference on Information and knowledge management
BioRegistry: automatic extraction of metadata for biological database retrieval and discovery
Proceedings of the 10th International Conference on Information Integration and Web-based Applications & Services
BioRegistry: Automatic extraction of metadata for biological database retrieval and discovery
International Journal of Metadata, Semantics and Ontologies
On the local closed-world assumption of data-sources
LPNMR'05 Proceedings of the 8th international conference on Logic Programming and Nonmonotonic Reasoning
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An information integration system provides a uniform query interface to a collection of distributed and heterogeneous information sources, giving users or other agents the illusion that they interrogate a centralized and homogeneous information system. In this paper, we focus on the use of knowledge representation techniques for building mediators for information integration. A mediator is based on the specification of a single mediated schema describing a domain of interest, and on a set of source descriptions expressing how the content of each source available to the system is related to the domain of interest. These source descriptions, also called mappings because they model the correspondence between the mediated schema and the schemas of the data sources, play a central role in the query answering process. We present two recent information integration systems, namely PICSEL and Xyleme, which are illustrative of two radically different choices concerning the expressivity of the mediated schema.