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Rule opt ws identifier opt ws opt ws expression opt ws eol.
Backus naur form beispiel. Find out more about how this works in today s random wedne. Line end opt ws eol line end line end. Bnf backus naur form is a syntactic metalanguage i e a language about a language.
Die backus naur form oder backus normalform ist eine kompakte formale metasprache zur darstellung kontextfreier grammatiken. Bnf is a purely text based notation. Expression list expression.
The metalanguage is a formal notation for specifying the grammar that describes the syntax of a programming language. Bnf easier in the writing language. For instance in official language.
A backus naur forma ismert még mint bnf vagy backus naur formalizmus backus normálforma bacus naur forma vagy pánini backus forma környezetfüggetlen nyelvtanok leírására használható metaszintaxis. Bnf was originally developed by john backus and subsequent contribution from peter naur to describe the syntax of algol 60 programming. Using bnf it is possible to.
In computer science backus naur form or backus normal form bnf is a metasyntax notation 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 protocols they are applied wherever exact descriptions of languages are needed. Backus of the us and peter naur of denmark and usually written bnf is the best known example of a meta language q v i e. Backus naur notation shortly bnf is a formal mathematical way to describe a language to the backus naur form is a way of defining syntax.
Backus naur form bnf ebnf backus naur form syntax rule syntax. List term whitespace list. The standard technique for defining the syntax of a computer language is to use backus naur form bnf.
Backus naur form bnf backus naur form named after john w. Bnf received after digunakanakan to describe algol in the early 1960s. Hierzu zählt die syntax gängiger höherer programmiersprachen.
Sie wird auch für die notation von befehlssätzen und kommunikationsprotokollen verwendet. The text descriptions consist of a simple variant of backus naur form bnf that includes the following symbols and conventions. Ursprünglich war sie nach john w.
Végeredményben formális nyelvek is leírhatók vele. Bnf kalu from his pack bambang hari is a formal language developed by backus and peter naur for mendeskrispsikan language grammar. Beide waren pioniere der informatik die sich mit der erstellung der algol 60 regeln und insbesondere mit der kunst.
Each graphic syntax diagram in this reference is followed by a link to a text description of the graphic. A bnf széles körben használatos a számítógépek programozási nyelveinek nyelvtanának leírására. Identifier character character.
Bnf or backus naur form is an elegant and succinct way of expressing a grammar in very few lines. Term literal identifier.
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