text: export const SCXML = 'scxml';
  export const STATE = 'state';
  export const PARALLEL = 'parallel';
  export const INITIAL = 'initial';
  export const FINAL = 'final';
  export const HISTORY = 'history';
  export const TRANSITION = 'transition';
  
  export const COMPOUND = 'compound';
  export const ATOMIC = 'atomic';
  
  export const HISTORY_DEEP = 'history_deep';
  export const HISTORY_SHALLOW = 'history_shallow';
  
  export const TARGETLESS = 'targetless';
  export const INTERNAL = 'internal';
  export const SPONTANEOUS = 'spontaneous';
  export const EXTERNAL = 'external';
  