Extended BNF ==>
Extended Backus-Naur Form
<language> Any variation on the basic Backus-Naur Form (BNF) meta-syntax
notation with (some of) the following additional constructs: square brackets
"[..]" surrounding optional items, suffix "*" for Kleene closure (a sequence of
zero or more of an item), suffix "+" for one or more of an item, curly brackets
enclosing a list of alternatives, and super/subscripts indicating between n and
m occurrences.
All these constructs can be expressed in plain BNF using extra productions and
have been added for readability and succinctness.
(1995-04-28)
Nearby terms:
Extended Affix Grammar « Extended ALGOL « Extended
Architecture « Extended Backus-Naur Form »
Extended Binary Coded Decimal Interchange Code »
Extended BNF » Extended C++
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