In this work we consider the behavioral aspects of system modeling. In order to specify the behavior of a system, many different notations can be used. Quite often different terms in these notations are related with to same element in a system implementation. In order to relate these terms and guarantee the consistency between different notations some standard can be used. In this work we show how the Reference Model for Open Distributed Processing (RM-ODP) can be used for the purpose of the mapping of terms from different behavioral notations. In particular, we show the correspondence between terms in UML activity diagrams, UML state diagrams and Finite State Automata by means of relating them with RM-ODP terms. This allows us to consider RM-ODP as a possible meta-model for behavior specifications written in UML, which help to insure the consistency of UML models.