An automated testing framework is described here based on Discrete Event System Specification (DEVS - in C++) modeling and simulation formalism, Extensible Markup Language (XML), and System Entity Structure (SES),being introduced at DoD’s Joint Interoperability Test Command (JITC) for interoperability testing. This framework supports the separation of experimentation, models, and simulators. The experimental frames are developed to

support reusable models and simulators based on the DEVS formalism and dynamic system theory. The hierarchical structures of the models are represented by SES and written in XML format to promote extensibility and interoperability. In order to support the separation of models and simulators in the software development, the

Model/Simulator/View/Controller design pattern provides the framework to support model execution and multiple network simulation protocols.