The number sign ( # ) notation is used to denote one of the following items in a reference syntax:
An unnamed object
Specify a property in a reference syntax if a property and an object have the same name
You can use the ‘#’ (number sign) syntax with JavaScript if it used with the resolveNode method.
#
The following reference syntax accesses an unnamed subform:
xfa.form.form1.#subform
The following reference syntax accesses the name property of a subform if the subform also contains a field named name :
xfa.form.form1.#subform.#name
