Do "State Machines" used in Workflow-NG module (D5) have any visual interface (in node form or whatever)? Or they are totally internal entities that I can only set and evaluate? The initial objective behind question was to send emails based on changed node status (taxonomy based).

Bu Durum Makineleri hantal iseniz, muhtemelen özel modül izleme nodu değişiklikleri lehine ardından gelen reddedebilir.