The Genstat punctuation symbols are:
colon (:)
indicates the end of a statement;
comma (,)
separates items;
double quote (")
is used to show the beginning and end of a comment;
equals (=)
separates an option name or parameter name from its setting;
newline
is synonymous with colon, by default, but directive SET can request that it be ignored;
semi-colon (;)
separates lists;
single quote (')
is used to show the beginning and end of a string (left single quote (`) is synonymous with single quote);
space
can appear between items or can be omitted altogether if the items are already separated by another punctuation symbol, a bracket, an operator, or an ampersand;
tab
the tab character is treated as a synonym of space everywhere except within texts and comments or if reading in fixed format (when it is treated as a fault).