The flow diagrams are executed on a remote computer (e.g. Raspberry Pi) using the flow program. The flow web app (flow user interface) sends messages to the flow program using a websocket connection.

Data flow diagrams help you visualize and document your data pipeline. ... or an API. A destination is an entity that receives data from the system, such as a dashboard, a report, or an application.

This paper (1) gives a brief description and explanation about the D-case technique and E-learning system (web portal) called KISSEL (Knowledge Integrated Server System for E-Learning), which was ...