🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsTürkçeРусскийفارسی한국어中文日本語EntityQ1165219· pop 24· linked from 55 articlesextended Backus–Naur formAlso known as EBNFfamily of metasyntax notations, any of which can be used to express a context-free grammarAvailable in 22 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoArmenianCatalanConnectionsterminal and nonterminal symbolsEntitycomputer scienceEntityCategoriesCompiler constructionFormal languagesMetalanguages