IBIS: Semantic Data Integration at Work

Andrea Calì, Diego Calvanese, Giuseppe De Giacomo, Maurizio Lenzerini, Paolo Naggar, and Fabio Vernacotola

Proc. of the 15th Int. Conf. on Advanced Information Systems Engineering (CAiSE 2003). Volume 2681 of Lecture Notes in Computer Science. 2003.

In this paper we present IBIS (Internet-Based Information System), a system for the semantic integration of heterogeneous data sources, which adopts innovative and state-of-the-art solutions to deal with all aspects of a complex data-integration environment, including query answering under integrity constraints and limitations on source access. IBIS is based on the global-as-view approach, using a relational mediated schema to query the data at the sources. Sources are wrapped so as to provide a relational view on them. A key issue is that the system allows the specification of integrity constraints (modeling constraints in the domain of interest) in the global schema. Since sources are autonomous, the extracted data in general do not satisfy the constraints. IBIS adapts and integrates the data extracted from the sources making use of the constraints in the global schema, so as to answer queries at best with the information available. IBIS deals with limitations in accessing data sources, and exploits techniques developed for querying sources with access limitations in order to retrieve the maximum set of answers. In particular, it may use integrity constraints available on the sources to improve the efficiency of the extraction process.

   title = "IBIS: Semantic Data Integration at Work",
   year = "2003",
   author = "Andrea Calì and Diego Calvanese and De Giacomo,
Giuseppe and Maurizio Lenzerini and Paolo Naggar and Fabio Vernacotola",
   booktitle = "Proc. of the 15th Int. Conf. on Advanced Information Systems
Engineering (CAiSE 2003)",
   pages = "79--94",
   volume = "2681",
   publisher = "Springer",
   series = "Lecture Notes in Computer Science",
   doi = "10.1007/3-540-45017-3_8",
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