private function getType(\DOMElement $node)
{
if ($node->hasAttributeNS(self::XMLNS_JSONDOM, 'type')) {
return $node->getAttributeNS(self::XMLNS_JSONDOM, 'type');
} else {
$xpath = new Xpath($node->ownerDocument);
return $xpath('count(*) > 0', $node) ? 'object' : 'string';
}
}