The design of an ECIDS should always be communicated in a way that is pertinent and useful to the intended audience. One effective way of communicating the ECIDS design is through a system design diagram, which provides a graphical representation of the data system so that audiences can visualize it more easily. This brief presents two types of diagrams that can be used for communicating a state's ECIDS design: a presentation diagram and a conceptual diagram. (author abstract)