This document presents the Database Design Tool prototype, developed at the University of Twente. The Tool is used to specify databases in a graphical way, and is based on a formal specification language TM (described in ECOOP’93 article [2]). TM and the Database Design Tool support object-oriented concepts such as classes, object, methods and inheritance. The main point we want to state is that software engineering based on a sound formal basis does not have to sacrifice ease-of -use and flexibility; we state that, on the contrary, it is this formal basis which proves to be beneficial and profitable for the user - enabling faster and error-free software development.
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