Definitions for "Context-free grammar"
Keywords:  cfg, grammar, chomsky, axiom, formal
(CFG) A grammar in which every production rule is of the form :V - w where V is a non-terminal symbol and w is a string consisting of terminals and/or non-terminals.
a formal system that describes a language by specifying how any legal text can be derived from a distinguished symbol called the axiom , or sentence symbol
Chomsky mathematical formalism for language