ISO/IEC 14977:1996 Preview
Information technology -- Syntactic metalanguage -- Extended BNF
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.
The electronic version of this International Standard can be downloaded from the ISO/IEC Information Technology Task Force (ITTF) web site
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.