java - Orbeon:Set default value for app -

orbeon form builder:
in new mode,how can set default value "app".
try in dialog-form-setting.xpl.but not work.

if want users able create forms in app, don't need change dialog-form-setting.xpl instead can update form-builder-permissions.xml include:

<role name="*" app="myapp" form="*"/> 

where myapp app want restrict users to. , of course, through configuration file, can make restriction more granular, on per-role basis.