Diagram(
  Choice(0,
    Terminal('ENABLE'),
    Terminal('DISABLE'),
    Sequence(Choice(0, Terminal('PREFIX'), Terminal('POSTFIX')), NonTerminal('name')),
    Terminal('NOPREFIX'),
    Terminal('NOPOSTFIX'),
    Sequence(Terminal('LOCALE'), Terminal('EXTRA'),
             Choice(0, Terminal('ENABLE'), Terminal('DISABLE'))))
)