DB References

!!CE is a DB reference. Following the command:

!X = !!CE

!X is now a new reference to the same DB element, but the element itself has not been copied.

!Value = !X.Attribute

This will now return an attribute of the current element.

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,

!!CE = !X

This 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.