Abstract
This paper presents our position and experience on integrating \emphformal methods with the \emphModel-driven Engineering
         (MDE) approach to software development. Both these two approaches have advantages and disadvantages, and we here show how
         the advantages of one can be exploited to cover or weaken the disadvantages of the other. We also propose an \emphin-the-loop
         integration which allows the development of a general framework for software engineering where rigorousness and preciseness
         of formal methods are combined with flexibility and automation of the MDE. We discuss the feasibility of unifying these two
         separate worlds, referring to our experience on integrating the Abstract State Machine formal method with the Eclipse Modeling
         Framework supporting MDE facilities.
      
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