> Hi,
>
>> The 'xforms-value-changed' event didn't fire when click 'Get Next
>> Person' button. In fact, the value of person's age is changed.
>
> That event is "dispatched in response to: a change to an instance data
> node bound to a form control." I suppose it doesn't matter if the
> _instance_ changes; relevant is only a change regarding the node value
> in a certain instance.
>
>  > I test these case:
>
>> 1.  'replace' of submission control is 'instance',
>> xforms-value-changed event is not fired;
>
> That's correct in my opinion. Neither the value of the "age" node of
> instance A nor that of the same node of instance B have changed. It's
> not a change of the value of a certain node that happened, instead it's
> a replacement of the complete instance; the _nodes_ of the instances
> haven't changed.
>
>> 2.  'replace' of submission control is 'node', xforms-value-changed
>> event is fired;
>
> Here the instance remains instance A, and its node "age" has changed, so
> the event should get fired.
>
>> 3.  'replace' of submission control is 'text', xforms-value-changed
>> event is fired;
>
> Same as 2.
>
> To check if the node value has changed after an instance change, there
> are different ways. One could use a second "observer" instance with a
> node bound to the "age" node of the main instance and its value
> calculated from that node. The node of the "observer" instance then
> should change in every of the three test cases, and in all the three
> cases a change event should get dispatched regarding the "observer" node.
>
>
> florian