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In computer science, Backus–Naur form (BNF; / ˌ b æ k ə s ˈ n aʊər /; Backus normal form) is a notation used to describe the syntax of programming languages or other formal languages. It was developed by John Backus and Peter Naur. BNF can be described as a metasyntax notation for context-free grammars. Backus–Naur form is applied ...
The representation of a grammar is a set of syntax diagrams. Each diagram defines a "nonterminal" stage in a process. There is a main diagram which defines the language in the following way: to belong to the language, a word must describe a path in the main diagram.
It also does not require every nonterminal to be explicitly defined. Nonterminals such as <text> and <opt-whitespace> are implicitly defined as ASCII-character and optional white space respectively. 'Augmented Backus–Naur form' denotes nonterminal symbols by starting a one-word-name with an alphabet as the name of the syntactic category ...
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Here's What 'WYD' Means in Texting. What Does 'DW' Mean in Text? Most commonly, the meaning of "DW" in text is "don't worry." (Doctor Who or Arthur fans everywhere may disagree.) This meaning ...
In computer science, augmented Backus–Naur form (ABNF) is a metalanguage based on Backus–Naur form (BNF) but consisting of its own syntax and derivation rules. The motive principle for ABNF is to describe a formal system of a language to be used as a bidirectional communications protocol .
In computer science, extended Backus–Naur form (EBNF) is a family of metasyntax notations, any of which can be used to express a context-free grammar. EBNF is used to make a formal description of a formal language such as a computer programming language. They are extensions of the basic Backus–Naur form (BNF) metasyntax notation.
Sabrina Carpenter Graham Denholm/TAS24/Getty Images for TAS Rights Management After spending time Down Under opening for Taylor Swift on The Eras Tour, Sabrina Carpenter has picked up some of the ...