It is widely accepted that role-based modelling is quite adequate in the context of multi-agent systems (MAS) modelling techniques. Unfortunately, very little work has been reported on how to describe the relationships between several role models. Furthermore, many authors agree on that protocols need to be encapsulated into high-level abstractions. The synthesis of role models is an operation presented in the OORAM methodology that allows us to build new role models from others in order to represent the interrelations they have. To the best of our knowledge this operation has to be performed manually at protocol level and works with protocols expressed by means of messages. In this paper, we present two algorithms to extract the protocol of a role from the protocol of a role model and vice versa that automate the synthesis or role models at the protocol level. Furthermore, in order to deal with protocol descriptions in a top down approach both operations work with protocols expressed by means of an abstraction call multi-role interaction (mRI)
