##Composition Operators

The composition operators are functions that take two processes as input and generate a third one \cite{Istoan_2012}. The result process represents the composition of the processes provided. There are different strategies to perform a processes composition. Each operator described below implements one specific rule.

• Serial Composition: Takes two processes and performs a serial composition - the parameters order are important to the operator behavior. (Figure 2)
• Parallel Composition: Takes two processes and perform a parallel composition - the parameters order are not relevant to the operator behavior (Figure 3)