State

The _state property on a Noun represents a Finite State Machine while the state of a Resource is it's current State.

Switch:
  _state:
    initial: inactive
    states:
      inactive:
        on:
          toggle: active
      active:
        on:
          toggle: inactive

The syntax of _state is compatible with XState (opens in a new tab) and can be visualized (opens in a new tab) and edited (opens in a new tab) with Stately (opens in a new tab)