Backus-Naur Form

In computer science, BNF 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 protocol; the other main technique for writing context-free grammars is the van Wijngaarden form.

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Extended Backus–Naur Form

Augmented Backus–Naur Form

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