
Nonterminals must be declared as predicates of the class 'nonterm'. For example, the full declaration of Statement might be
'nonterm' Statement
'rule' Statement: Variable ":=" Expression
'rule' Statement: "IF" Expression "THEN" Statement "ELSE" Statement
'rule' Statement: "WHILE" Expression "DO" Statement
'rule' Statement: "BEGIN" StmtSeq "END"
