<BeadlStates> element defines a container for specifying all states of a BEADL task protocol.
<BeadlStates> element container is allowed within a
<BeadlTrialProtocol> element and must contain at least one
<BeadlState> child element.
... <BeadlStates> <BeadlState name="StateName"> ... </BeadlState> </BeadlStates> ...
<BeadlState>element: Definition of a single state of the behavioral task.