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Additional
BNF grammar
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Backus–Naur Form
In
computer science
,
BNF
(
Backus Normal Form
or
Backus–Naur Form
) is one of the two main
notation techniques
for
context-free grammars
, often used to describe the
syntax
of languages used in computing, such as computer
programming languages
,
document formats
,
instruction sets
and
communication protocols
; the other main technique for writing context-free grammars is the
van Wijngaarden form
. They are applied wherever exact descriptions of languages are needed: for instance, in official language specifications, in manuals, and in textbooks on programming language theory.
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