#1 Whitespace   EBNF

#1.1 ASCII Tabulator

CONST ASCII_TAB = CHR(8);

#2 Line Comment   EBNF

(At the first column of a line)

#3 Block Comment   EBNF

(At most ten nesting levels including outermost comment)

#3.1 Comment Character   EBNF

#4 End Of Line Marker   EBNF

#4.1 ASCII Line Feed

CONST ASCII_LF = CHR(10);

#4.2 ASCII Carriage Return

CONST ASCII_CR = CHR(13);