Conflict Compensation, Redundancy and Similarity in DataBases Federation

Abstract

Integration of several databases is a complex process, in which it is needed to specify if two databases with entities and relationship are similar or strong equivalents or weak equivalent. Data bases that are strong equivalent became identical with suitable change of entities without change the relationship. In this situation in the federation of databases we have a lot of strong redundant databases that can be changed in only one prototype. The week equivalence or week redundant databases are more difficult to discover because in the federation of databases change the entities but also the relationship. For example images on the sphere are week equivalent to the projected image that is a locally distortion of the original images. In this paper we give the algorithm to discover the week redundant databases and also how to create the local compensation in a way to transform all the different databases in only one prototype. This is a useful method to solve conflicts among agents as databases.