fr:frame(). fr 
< fr A.frame | 
fr.var =
x > & (
a:Label. (a fr.acts) 
(ef:eff(). ef < ef A.eff | ef.kind = a & ef.smt.lbl = x > ))
is mentioned
In prior sections: mb automata 2 mb automata 3
Try larger context:
GenAutomata