PML Customisation
User Guide
Copies and References (for Advanced Users) : DB References
!!CE is a DB reference. Following the command:
!X is now a new reference to the same DB element, but the element itself has not been copied.
When the current element changes, !!CE will point to a new DB element. In this example, !X will not be changed but remains as a reference to the previous current element. Because !!CE is special,
will navigate to a new current element provided !X is another DB reference. In this example the command would navigate to the previous current element.
