Herein, we will focus on proposing a service taxonomy and classification for RBA/SOA architectures aiming to model a common framework for the description and composition of possible Atomic Services or networking functions valid for architectures coping with heterogenous environments. The final objective is fine-tuning the delivery chain to optimize application and delivery performance and behaviour in heterogenous networks. Although our work takes the TARIFA architecture as the basis model for our contribution, we think it can be helpful for other architectures dealing with protocol modularization and service composition.