International Organization for Standardization (ISO)
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ISO/IEC 14977:1996
Scope
Defines a notation, Extended BNF, for specifying the syntax of a linear sequence of symbols. It defines both the logical structure of the notation and its graphical representation.
ISO/IEC 14977:1996 history
1996ISO/IEC 14977:1996 Information technology - Syntactic metalanguage - Extended BNF