; line comment ruleset = [optional] *(group1 / group2 / SP) CRLF ; trailing comment group1 = alt1 group1 =/ alt2 alt1 = %x41-4D / %d78-90 alt2 = %b00100001 group2 = *1DIGIT / 2*HEXDIG / 3*4OCTET a optional = hex-codes / literal / sensitive / insensitive hex-codes = %x68.65.6C.6C.6F literal = "string literal" sensitive = %s"case-sensitive string" insensitive = %i"case-insensitive string"