Before revision: The conventions commonly used are: a bar above () a leading slash (/Q) a lower-case n prefix or suffix (nQ or Q_n) a trailing # (Q#), or an _B or _L suffix (Q_B or Q_L).
After revision: The co"n"leading exclamation mark (!Q) aventions commonly used are: a bar above () a leading slash (/Q) a lower-case n prefix or suffix (nQ or Q_n) a trailing # (Q#), or an _B or _L suffix (Q_B or Q_L).