The MODIFY CLASS command changes the characteristics of one or
more classes. You can alter the following characteristics:
o The name of the class.
o The access to the class (READ_ONLY or NOREAD_ONLY). You cannot
change the contents, the name, or the remark of a class that
has been set to READ_ONLY.
o The creation remark that is associated with the class.
Use the SHOW CLASS command to display class characteristics.