Abstract

In this paper we present X2R, a system for integrating heterogeneous data sources in an ontological knowledge base. The main goal of the system is to create a unified view of information stored in relational, XML and LDAP data sources within an organization, expressed in RDF using a common ontology and valid according to a prescribed set of integrity constraints. X2R supports a wide range of source schemas and target ontologies by allowing the user to define potentially complex transformations of data between the original data source and the unified knowledge base. A rich set of integrity constraint primitives has been provided to ensure the quality of the unified data set. They are also leveraged in a novel approach towards semantic optimization of SPARQL queries.

Keywords

MSC

68P15, 68T30, 68U35

Cite this article

@article{cai-11125,
  author  = {Antoni Myłka and Alina Myłka and Bartosz Kryza and Jacek Kitowski},
  title   = {Integration of Heterogeneous Data Sources in an Ontological Knowledge Base},
  journal = {Computing and Informatics},
  volume  = {31},
  number  = {1},
  pages   = {189--223},
  year    = {2012},
  issn    = {1335-9150},
  url     = {https://cai.type.sk/content/2012/1/integration-of-heterogeneous-data-sources-in-an-ontological-knowledge-base/}
}
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