Incompatibility Domain Definition Incompatibility Entity Definition Incompatibility Data Value Incompatibility

In a multidatabase system schematic con icts between two objects are usually of inter est only when the objects have some semantic a nity In this paper we try to reconcile the two perspectives We rst de ne the concept of semantic proximity and provide a semantic taxonomy We then enumerate and classify the schematic and data con icts We discuss possible semantic similarities between two objects that have various types of schematic and data con icts Issues of uncertain information and inconsistent information are also addressed