Click a term to initiate a search.
Determining the correspondences among heterogeneous data sources, which is critical to integration of the data
sources, is a complex and resource-consuming task that demands automated support. We propose an iterative procedure
for detecting both schema-level and instance-level correspondences from heterogeneous data sources. Cluster analysis techniques
are used first to identify similar schema elements (i.e., relations and attributes). Based on the identified schema-level
correspondences, classification techniques are used to identify matching tuples. Statistical analysis techniques are then
applied to a preliminary integrated data set to evaluate the relationships among schema elements more accurately.
Improvement in schema-level correspondences triggers another iteration of an iterative procedure. We have performed
empirical evaluation using real-world heterogeneous data sources and report in this paper some promising results (i.e.,
incremental improvement in identified correspondences) that demonstrate the utility of the proposed iterative procedure.