Modern technologies including rapid increase in speed and availability of network of supercomputer provides the infrastructure necessary to develop distributed applications and making high performance global computing possible. The performance potential offered is enormous but generally is hard and tedious to obtain due to the complexity of developing applications in such distributed environment. In this paper, we introduce \medley which is a specification language of communications for parallel applications. Its aim is to provide to the user an abstract vision of his application in terms of tasks and exchanges between these tasks independently of material architecture and the means of communication used. Based on this specification, the \medley compiler generates several levels of implementation for various communication primitives. More precisely, we will detail in this article, a new approach of this language allowing the implementation of the communications based on ideas underlying the Common Object Request Broker Architecture \emph{CORBA}.