KnowraBackus–Naur formLinked fromLinked fromThe 6 pages that link to Backus–Naur form, each with the reason it gives.All 6Broader topic 2Related 4Formal grammarBroader topic: It presents grammar rules in a form used in many language specifications.MetasyntaxBroader topic: It is the best-known metasyntax for specifying programming-language grammars.