In  Puget argued for a “model-and-run” paradigm for constraint programming. He proposed to develop a standard file format to express CP models. There is no such unified modeling standard available to the CP community, so constraint programs cannot be developed independently from the used CP library and they are hard to maintain.
This research targets platform-independent object-oriented modeling of constraint programs. It will be shown how CP models can be expressed using software technology standards, and further how these standards will enable automated transformation and execution of such models. The work reconsiders results published in . There, we have formally shown how the Unified Modeling Language (UML) and the Object Constraint Language (OCL) can be used to create well formed models of constraint problems called Constraint Network Schemata (CNS). Resting upon this, the author now proposes to see Model Driven Architecture (MDA) as a chance for further research advances.