The GO programming language syntax is specified using Extended Backus-Naur Form (EBNF):

• Production = production_name “=” [ Expression ]
• Expression = Alternative { “l” Alternative }
• Alternative = Term { Term }
• Term = Production_name l token [ “?”token] l Group l Option l Repetition
• Group = ” ( “” Expression”)”
• Option = ” [ ” Expression “” ]”
• Repetition = ” {” Expression “}”