PML Customisation
User Guide
Copies and References (for Advanced Users) : DB References : Deep Copy involving References:
Where !Y is an array or object:
will make a deep copy of !Y. However, if any of the array elements is a reference (e.g. to a gadget or DB element), a copy is made of the reference, but not of the object it refers to. In other words a deep copy stops copying when it reached a reference.
