You can use the DoDAF modeling feature to describe the architecture of a complex system. The DoDAF feature uses the Unified Modeling Language (UML) as a base to represent a system's structure in visual, textual, and tabular formats.
You can use the UPIA modeling feature to develop a comprehensive enterprise architecture, and to analyze, design, and deploy the systems that are needed to carry out the mission of the enterprise. As you refine the enterprise architecture in lower levels of the model, you can ensure that the service oriented architecture (SOA) being developed is consistent with the enterprise strategy.