from : http://www.openarchitectureware.org/forum/viewtopic.php?showtopic=9124
"MDA does not mean that you need to have UML models. Its only one way and sometimes not the best. Further, forget about the MDA spec. It is even no specification at all, its only a "guide". And it does not work as the MDA people think. Best practices in model-driven development are to not conform to MDA, so we call this MDSD. It might be that your process is more or less like MDA suggests, but you will only be successful if you break MDA concepts.
This is a long story...
Karsten Thoms"
