A formal grammar describes which strings from an alphabet of a formal language are valid according to the language's syntax. A grammar does not describe...

well-formed according to a specific set of rules called a formal grammar. The alphabet of a formal language consists of symbols, letters, or tokens that concatenate...

formulas, which are strings of symbols from an alphabet, formed by a formal grammar (consisting of production rules or formation rules). Deductive system...

In formal language theory, a context-free grammar (CFG) is a formal grammar whose production rules can be applied to a nonterminal symbol regardless of...

comprising the symbolic "words" or "sentences" of a formal system Formal grammar, a grammar describing a formal language Colloquialism, the linguistic style...

fields of formal language theory, computer science, and linguistics, is a containment hierarchy of classes of formal grammars. A formal grammar describes...

it – that is, before it has any meaning. Formal proofs are expressed in some formal languages. A formal grammar (also called formation rules) is a precise...

Cognitive science Formalism (philosophy of mathematics) Formal grammar Formal language Formal method Formal system Form and content Mathematical model Mathematical...

In formal languages, terminal and nonterminal symbols are the lexical elements used in specifying the production rules constituting a formal grammar. Terminal...

A context-sensitive grammar (CSG) is a formal grammar in which the left-hand sides and right-hand sides of any production rules may be surrounded by a...