is a graphical representation of the “flow” of data through an information system, modelling its process aspects. Often it is a preliminary step used to create an overview of the system that can later be elaborated. These diagrams can also be used for the visualization of data processing (structured design) and show what kind of information will be input to and output from the system, where the data will come from and go to, and where the data will be stored. It does not show information about the timing of processes or information about whether processes will operate in sequence or in parallel. Note that a Data Exchange Diagram in the context of the Test-bed Technical Infrastructure focusses specifically on how data is exchanged between solutions, the infrastructure components and simulators.
Data Exchange Diagram