The Impedance Mismatch in Light of the Unified State Model

In this paper the authors discuss the misunderstanding that arose over the years around the broadly defined term of the objectrelational mismatch. It occurs in many different aspects of programming. There are three concerns considered the most important: mismatching data models, mismatching binding times and mismatching object lifecycle. This paper focuses on the data model mismatch. The authors propose a theoretical approach to this mismatch through the introduction of the common state theory, which is a proposal of a unified language for the models of objects of popular programming languages as well as for basic database models. Using this theory and the discussion around it, the authors show that the mismatch of data models is no longer ans issue.