Only 1.3.7 writes a data store. Every other flow ends at 1.3.7 and is gone when the run ends. 1.3.1 is the only process that reads a store; the others take their input from each other. It explodes at Level 4. Each flow is named by the one structure it holds, defined in Data Dictionary §6.0. Two structures passing between the same two processes are drawn as two flows. The amber circles are shared modules (SharedModules.md), not process steps of this diagram.