All variables defined and returned from controllers starting with "_" (underscore) are grouped in sub-namespace called "app" whether every dictionary in variable that starts with "plugin_" generates a sub-namespace with the same identifier. 

<script type="text/javascript" charset="utf-8">
{{wupdate = dict([([k[1:], v]) for k,v in response._vars.items() if k.startswith('_')])}}
window.app = jQuery.extend(true, window.app, {{=XML(jsdumps(wupdate))}});
{{for k,v in response._vars.items():}}
    {{if k.startswith('plugin_'):}}
    	window.{{=k}} = jQuery.extend(true, window.{{=k}}, {{=XML(jsdumps(v))}});
	{{pass}}
{{pass}}
</script>