CHANGES

 This option allows you to specify that changes can be  performed
 on the key.

 The default for the primary key is NOCHANGES and the default for
 alternate  keys  is  CHANGES.   You  can override the CHANGES on
 alternate keys with NOCHANGES.  It is illegal to specify CHANGES
 on the primary key.

 When opening an  existing  file,  the  Pascal  Run-Time  Library
 ignores this option.