Semantic Integration of Information Systems

In the previous years Information System manage only information inside the company, today a company may search and manage information of the other companies. In this scenario the problem of communication between Information Systems is of the highest importance. Up to the present moment, several types of integration have been used but all were founded on the agreement (about data to share and the exchange format) between the interested Information Systems. Today, thanks to the new technologies, it is possible that an Information System uses data of another Information System without a previous agreement. The problem is that, often, the Information System may refer to the same data but with different names. In this paper we present a methodology that, using ontology, and thus the intrinsic semantic of each data of the Information System, allow to create a global ontology useful to enable a semantic communication between Information Systems.