QlikView Backus Naur Form (BNF)

Backus-Naur Form (BNF): It is a notation for expressing the syntax of a programming language or other formal language. It is named after John Backus and Peter Naur, who developed it in the 1960s as part of their work on the ALGOL programming language.

In BNF, the syntax of a language is expressed as a set of rules, each of which defines a symbol or group of symbols in the language. Each rule consists of a symbol being defined, followed by the symbol “::=”, and then a definition of the symbol in terms of other symbols or terminal symbols (symbols that cannot be further defined).

For example, here is a simple BNF rule defining a variable in a programming language:

<variable> ::= <identifier> <identifier> ::= <letter> | <letter> <identifier> <letter> ::= A | B | C | ... | Z | a | b | c | ... | z

In this example, the symbol <variable> is defined as an <identifier>, and an <identifier> is defined as either a single <letter> or a <letter> followed by an <identifier>. The <letter> symbol is defined as one of the 26 uppercase or lowercase letters of the English alphabet.

I’m not familiar with QlikView, but if it is a programming language or has a formal syntax, it may use BNF or a similar notation to define its syntax.

A metalanguage is Backus Naur Form. Languages that are used to explain other natural or artificial languages are called metalanguages. Any metalanguage that defines and explains a language’s norms adheres to a certain notation method or metasyntax.

Backus Naur Form (BNF), Extended Backus Naur Form (EBNF), and Augmented Backus Naur Form are three popular metalanguages in the realm of computing (ABNF).

For a computer language to successfully translate into machine language during execution, it must be created in a well-defined and formatted structure.