Using definitions To Construct Operator Precedence Relations: 1 a ≒ b Û P→...ab... or P→..aQb... 2 Definition Û FIRSTVT(P)={a|P ⇒+ a... or P ⇒+ Qa...} LASTVT(P)={a|P ⇒+ ... a or P ⇒+ ... aQ} If there exists A→...aP...and b ∈ FIRSTVT(P), a <∙b If there exists A→...Pb...and a ∈ FIRSTVT(P), a∙>b