A CFG has four components A set of terminal symbols,sometimes referred to as 'tokens'. A set of non-terminals,sometimes called syntactic variables'. ·A set of productions. A designation of one of the non-terminals as the start symbol. CS308 Compiler Theory 7A CFG has four components • A set of terminal symbols, sometimes referred to as ‘tokens’. • A set of non-terminals, sometimes called ‘syntactic variables’. • A set of productions. • A designation of one of the non-terminals as the start symbol . CS308 Compiler Theory 7