You can use ViewVariables to control which variables represent view objects that should be refreshed when a refreshView operation is executed from the workItemEdit.jsp page. In general, a refreshView operation reloads the view data from all of its sources such as resource adapters.
<!-- The userView variable should be refreshed during a refreshView -->
<ViewVariables>
<List>
<String>userView</String>
</List>
</ViewVariables>
Use ViewVariables only when absolutely necessary for correct form and user interaction. This is option is seldom used.