private function appendText($content)
{
$text = $this->_current->appendChild($this->_dom->createElementNs($this->_xmlns, 'text'));
if (trim($content) !== $content) {
$text->appendChild($this->_dom->createCDATASection($content));
} else {
$text->appendChild($this->_dom->createTextNode($content));
}
return $text;
}