The valid field format characters are:
X - any character can be typed in
! - any upper case alphabetic or numeric character can be typed in
^ - any lower case alphabetic or numeric character can be typed in
# - any numeric character (0-9) can be typed in
0 - any numeric character(0-9) can be typed in
A - any alphabetic character, upper or lower case, can be typed in.
Any other character entered in the format will appear exactly as it is typed (e.g. hyphens "-" or full stops ".")