Talk:XForms/Dynamic Selection Lists

The sentence "This currently has a bug in it." should be more specific. Is there an error or abuse of the specification or a not expected behaviour? Further, because I'm new, where can I find a description of the &lt;source&gt;-element?

Cn-demand cascading drop downs
Cascading drop downs are useful when there is so many options on the most specific level that it is better not to send the whole list to the client in the beginning.

I would appreciate a modified version of the example, which fills the items in the second drop down after the first drop down is selected (and the filtered list for the second drop down is retrieved from the server)