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Defining formalisms and models in the Draw-Net Modeling System

This paper presents the Draw-Net Modelling System (DMS), a framework for the design and the solution of models expressed in any (graph based) formalism, including the possibility of representing complex models by means of multi-formalism and analyzing them by exploiting different solution modules. In this paper, the general open architecture of the DMS framework and the formal specification of the Data Definition Language (DDL) are introduced. A running example of multi-formalism model is used to illustrate the main concepts of the framework.