If just the ref
is given the last element of the list is cloned and appended.
Important: if the list is empty this action has no effect! See below.
Fore differs from XForms in that it will clear the values of the cloned item as most of the time
that's what is wanted. To preserve the values add keep-values
marker attribute.
When no origin
attribute is given the last entry of the list is cloned and
inserted. This behavior is conformant with XForms 2.0.
No at
given means we append the template to the list
context
is the parent node where to append (insert) a new item.