XMLElement el = act.getParent();
while (el.getParent() != null) {
el = el.getParent();
}
Package pkg = (Package) el;
Applications apps = pkg.getApplications();
Application defaultApp = apps.getApplication(defaultAppId);
if (defaultApp == null) {
// create default app
defaultApp = createXPDLObject(apps, null, true);
defaultApp.setId(defaultAppId);
}