|ISO standard BNF firstname.lastname@example.org (A Johnstone) (2004-04-14)|
|Re: ISO standard BNF Sven.Hartrumpf@FernUni-Hagen.de (2004-04-15)|
|Date:||15 Apr 2004 12:28:04 -0400|
|Posted-Date:||15 Apr 2004 12:28:04 EDT|
A Johnstone <email@example.com> writes:
> There is an ISO standard EBNF (ISO/IEC 14977:1996(E), see
> It contains some unhappy features, such as the use of , as
> a concatenation operator and allowing nonterminal names with
> spaces in them.
Agreed. I never use spaces inside nonterminal names (only _ if
needed) in order to reduce confusion. The , as concatenator
is not such a bad idea (after writing some ISO EBNF grammars).
> Has anybody ever used this version of EBNF,
> or ever seen it used in a book or paper?
Unfortunately, many people use their own variant of BNF.
But I have seen ISO EBNF specifications in some technical documents.
Dr. Sven Hartrumpf
Computer Science VII
University of Hagen
58084 Hagen - Germany
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