System

A system is the overall body of interactions between an actor and the set of goals

Example

actor "Guest" as a1
 
package Restaurant {
  usecase "Order Food" as g1
  usecase "Eat Food" as g2
  usecase "Pay for Food" as g3
}
 
a1 --> g1
a1 --> g2
a1 --> g3

This is an example Restaurant system in which the Guest actor can perform some common actions undertaken at a Restaurant