Die Grammatik von Oberon IV

Produktionsregeln P (in EBNF, Fortsetzung):

⟨ Expression ⟩ ---> ⟨ SimpleExpression ⟩
[ ⟨ Relation ⟩ ⟨ SimpleExpression ⟩ ]

⟨ Relation ⟩ ---> ``='' | ``#'' | ``<'' | ``<='' | ``>'' | ``>='' | ``IN'' | ``IS''

⟨ SimpleExpression ⟩ ---> [``+'' | ``-''] ⟨ Term ⟩
{ ⟨ AddOperator ⟩ ⟨ Term ⟩ }

⟨ AddOperator ⟩ ---> ``+'' | ``-'' | ``OR''

⟨ Term ⟩ ---> ⟨ Factor ⟩
{ ⟨ MulOperator ⟩ ⟨ Factor ⟩ }

⟨ MulOperator ⟩ ---> ``*'' | ``/'' | ``DIV'' | ``MOD'' | ``&''

⟨ Factor ⟩ ---> ⟨ Number ⟩ | ⟨ CharConstant ⟩ | ⟨ String ⟩ |
``NIL'' | ⟨ Set ⟩ |
⟨ Designator ⟩ [⟨ ActualParameters ⟩] |
``('' ⟨ Expression ⟩ ``)'' |
``˜'' ⟨ Factor ⟩

⟨ Set ⟩ ---> ``{'' [ ⟨ Element ⟩ { ``,'' ⟨ Element ⟩ } ] ``}''

⟨ Element ⟩ ---> ⟨ Expression ⟩ [``..'' ⟨ Expression ⟩]

⟨ ActualParameters ⟩ ---> ``('' [⟨ ExpList ⟩] ``)''

⟨ ExpList ⟩ ---> ⟨ Expression ⟩ { ``,'' ⟨ Expression ⟩ }

⟨ Designator ⟩ ---> ⟨ QualIdent ⟩ { ``.'' ⟨ Ident ⟩ |
``['' ⟨ ExpList ⟩ ``]'' |
``('' ⟨ QualIdent ⟩ ``)'' | `` ^ '' }