The coordination of distributed processing is of great in- terest to a number of research communities. However these research communities, such as those involved in e-science GRIDs and multi-agent systems, view this problem from dis- parate viewpoints. This paper aims to contribute to the nec- essary reconciliation of these perspectives. By demonstrat- ing the coordination of processes whether reactive (such as web services) or proactive (such as autonomous agents) can be done with a single representation using a protocol lan- guage, RASA. The multi-agent paradigm introduces, into any model of distributed systems, flexibility and autonomy that can be daunting and intimidating to scientists accus- tomed to more orthodox approaches. It is for this reason that it is important that the model for coordination of this system is reliable, verifiable, inspectable, referable, com- posable and executable. The language RASA provides this functionality, which we extend its use for not only agent in- teraction protocols but also to express workflows. The lan- guage for expression then becomes the domain of discourse as well as potentially the language for the workflow's exe- cution. Keywords: interaction protocols, web services, multi-agent systems, coordination.