Heterogeneous data-integration and data quality: Overview of conflicts

This paper describes the state of the art of data quality in the data-integration process of heterogeneous data sources. We define the concepts of data quality, of "non-quality" data (their reasons and costs) and the dimensions of data quality. We focus then, on the problems of data quality in the data-integration process of heterogeneous data sources and we present different strategies to handle with conflicts. We give a small insight on our work to study the domain constraints global consistency. Some related work will be presented at the end.