What is the latest edition of the BNF?

Related questions

1. What is context free grammar in automata?
2. What is Ebnf?
3. What is regular grammar in automata?
4. What is grammar in compiler?
5. Is BNF app free?
6. What is the difference between CFG and regular grammar?
7. What is BNF pharmacy?
8. What is Backus Naur form used for?
9. What is the difference between syntax and semantics?
10. What are terminals and nonterminals in grammar?

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