UI Control binding Expression

As per Section 4.2.5 (xforms-form-control)
   
If the instance referenced on the form control existed when the first
xforms-form-control-initialize event was processed
 
1. The binding expression is evaluated to ensure that it points to a
node that exists. If this is not the case then the form control should
behave in the same manner as if it had bound to a model item with the
relevant model item property resolved to false.
 
 
As per Section 8.1.8 (trigger Control)
 
Data Binding Restrictions: Binds to any node. This form control does not
directly interact with form data, but is affected by model item
properties of the bound node, thus binding attributes are not required.
 
 
So if I am reading this correctly, the processor should treat UI
controls differently when a UI Control does not have a binding
expression vs. when a UI control does have a binding expression but
points to a node that does not exist.
 
 
Regards