Process 0 is the whole system. Its data stores are inside it, so they are drawn where they are first shared rather than here. Each of the six fund providers supplies fund holdings together with that fund’s expense ratio and 30-Day SEC yield. Click any shape to reach its spec: an external entity opens its field-level composition in the Data Dictionary. Each flow is named by the one structure it holds. Click a flow name for its definition in Data Dictionary §6.0. FiscalData supplies two structures, so it has two flows. FiscalData and TreasuryDirect both supply auction results.