private function exportRdfToOutputChannel() { $exportController = new ExportController(new RDFXMLSerializer()); if ($this->pages !== array()) { return $exportController->printPages($this->pages); } if ($this->hasOption('file')) { return $exportController->printAllToFile($this->getOption('file'), $this->restrictNamespaceTo, $this->delay, $this->delayeach); } $exportController->printAllToOutput($this->restrictNamespaceTo, $this->delay, $this->delayeach); }