public function export($options = array()) {

	    $itemService = \taoItems_models_classes_ItemsService::singleton();
	    // copy local files
	    $source = $itemService->getItemDirectory($this->getItem());
	    $files = $source->getFlyIterator(Directory::ITERATOR_FILE | Directory::ITERATOR_RECURSIVE);
	    foreach ($files as $file) {
	        $relPath = ltrim($source->getRelPath($file), '/');
	        $this->addFile($file->readStream(), $relPath); 
	    }
	}