is mentioned by

Def [[t]] e s s' a tr == iterate(statevar x- > s.x statevar x'- > s'.x funsymbol x- > e.x freevar x- > a trace(P)- > tr.P x(y)- > x(y) over t)

[term_mng2]

In prior sections: mb automata 1

Try larger context: GenAutomata