Refactoring sequence diagrams for code generation in UML models

The UML Sequence Diagram along with Model Driven Architecture in software development helps to model the time constraint behavior that enhances the legibility of the structure and behavior of a system. The Object Constraint Language (OCL) helps to convey additional constraints and invariants required, but OCL confines into an expression language. The lack of program logic and flow of control limit these models to generate codes and also for proper verifications. This paper concentrates on refactoring XMI of Sequence diagram, an XML Meta data Interchange, with OCL constraints to build a framework for automatic code generation. The proposed model is tested in a coal mill of a Thermal Power Plant, a highly complex time constrained system. The source code generated from the refactored XMI is able to generate the set of coal mill parameters that matches to the real plant data results.