Augmented Backus-Naur Form

ALPHA%x41-5A / %x61-7A
DIGIT%x30-39
HEXDIGDIGIT / "A" / "B" / "C" / "D" / "E" / "F"
DQUOTE%x22
SP%x20
HTAB%x09
WSPSP / HTAB
LWSP*(WSP / CRLF WSP)
VCHAR%x21-7E
CHAR%x01-7F
OCTET%x00-FF
CTL%x00-1F / %x7F
CR%x0D
LF%x0A
CRLFCR LF
BIT"0" / "1"