/**
* @return string
* @throws \Exception
*/
public function getDatatype()
{
$nodeFactory = new NodeFactory();
$datatypeUri = self::$xsdString;
$datatype = librdf_node_get_literal_value_datatype_uri($this->redlandNode);
if ($datatype !== null) {
$datatypeUri = librdf_uri_to_string($datatype);
} elseif ($this->getLanguage() !== null) {
$datatypeUri = self::$rdfLangString;
}
return $nodeFactory->createNamedNode($datatypeUri);
}
public function newNamedNodeInstance($uri)
{
$factory = new NodeFactory();
return $factory->createNamedNode($uri);
}
