The wiring part looks like what you saw in the toy demo. Data flows left-to-right unidirectionally along wires from component to component. User-interface components, called projectors, are at the right.

Definition: A projector is a component that renders its input object onto a region of the user interface.

Data originates at the left of the wiring diagram and flows to the right.

Some components, called gateways, talk to domain objects. this will be shown next.

As you saw in the toy demo, we don’t have to worry about event handling or data updating in response to events.