I'd call it dataflow. It's also akin to what Excel does when solving a system. In a larger sense, you'd call it declarative (instead of imperative) programmin

I'd call it dataflow. It's also akin to what Excel does when solving a system. In a larger sense, you'd call it declarative (instead of imperative) programming - you're defining the system and an engine figures out how to make the system act like the definition - you're not giving step-by-step instructions.