Value name conflict while integrating data indatabase integration

Abstract

Integration of data is performed to provide user a unified view of heterogeneous data sources residing on different places. Major challenge in data integration process is; first identify and then resolve the data level conflicts. Ignoring identification and resolution of these conflicts produces inconsistent and erroneous data. In this paper we identify and resolve a new data level conflict. Data in different data sources may have similar semantics with different values. This difference in data may create inconsistent results when queried. Value of one concept may be present with different name in two different databases. These types of conflict need to be resolved for consistent and error free data. We named this conflict as Value Name Conflict. We provide the formal definition of this conflict using Z-Notation. Formal resolution function of this conflict is also presented.