<assets path="assets/xmls" rename="xmls" ></assets> ( in project.xml )
code:
var loader:URLLoader = new URLLoader();
loader.addEventListener(Event.COMPLETE, _loadCompleteHandler);
loader.addEventListener(IOErrorEvent.IO_ERROR, _loadIOErrorHandler);
loader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, _loadSecurityErrorHandler);
loader.load(new URLRequest("xmls/xxx.xml"));
But result io_error in flash target.
thanks