@startuml

package "Service Provider 1" {

    rectangle CLI as cli01
    rectangle CLI as cli02
    rectangle CLI as cli03


    rectangle ASB as asb01
    note right of asb01
      Service provider
      advertising to
      multiple users.
    end note

    cli01 -> asb01
    cli02 --> asb01
    asb01 <-- cli03

}

package "Service Provider 2" {
    rectangle CLI as cli04
    rectangle ASB as asb02
    note right of asb02
      Service provider
      advertising to
      one single users.
    end note

    cli04 -> asb02
}
@enduml