How to convert BNF to EBNF

Question

How can I convert this BNF to EBNF?

 ::= var ;
 ::=  {;}


        

Answer 1

Remove the angle brackets and put all terminals into quotes:

vardec ::= "var" vardeclist;
vardeclist ::= varandtype { ";" varandtype }
varandtype ::= ident { "," ident } ":" typespec
ident ::= letter { idchar }
idchar ::= letter | digit | "_"