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Additional
Van Wijngaarden grammar
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Van Wijngaarden grammar
In
computer science
, a
Van Wijngaarden grammar
(also
vW-grammar
or
W-grammar
) is a
two-level grammar
which provides a technique to define potentially infinite
context-free grammars
in a finite number of rules. The formalism was invented by
Adriaan van Wijngaarden
to define rigorously some
syntactic
restrictions which previously had to be formulated in
natural language
, despite their essentially syntactical content. Typical applications are the treatment of
gender
and
number
in
natural language
syntax and the well-definedness of identifiers in
programming languages
.
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