Final answer:
In data flow design, a data flow called from another flow is known as a subflow or subprocess, enhancing modularity and maintainability of system designs.
Step-by-step explanation:
In the context of data flow design, a data flow that is invoked or called from another data flow is typically known as a subflow or subprocess. This concept is used to organize complex processes into more manageable pieces and to avoid redundancy by reusing the same flow in multiple places within the system design.
A subflow operates as a component of a larger data flow diagram, encapsulating a sequence of processes and data stores that can be executed independently but are generally initiated by another, higher-level data flow.
The use of subflows enhances the modularity and readability of system designs, making them easier to understand, maintain, and update.