17 - Lexical rules A subset of the BNF (Backus-Naur Form) is used in these pages : <traditional English expression> as it says... [<stuff>] stuff is optional {<stuff>}+ stuff is present at least one or more times {<stuff>}* stuff is present 0 or more times
A subset of the BNF (Backus-Naur Form) is used in these pages :
<traditional English expression> as it says...
[<stuff>] stuff is optional
{<stuff>}+ stuff is present at least one or more times
{<stuff>}* stuff is present 0 or more times
