is mentioned by

Def action_effect(a;es;fs) == < e.smt | e < e es | e.kind = a > > + < mk_smt(f.var, f.var, f.typ) | f < f fs | a f.acts > >	[action_effect]
Def a +* b == a + b	[vcs_add]

In prior sections: mb collection mb automata 1

Try larger context: GenAutomata