function test_from_turtle_parses_datatypes()
{
$g = new SimpleGraph();
$g->from_turtle('<http://example.org/subj> <http://example.org/pred> "1390"^^<http://www.w3.org/2001/XMLSchema#gYear> .');
$this->assertEquals(1, count($g->get_triples()));
$index = $g->get_index();
$this->assertEquals("1390", $index['http://example.org/subj']['http://example.org/pred'][0]['value']);
$this->assertEquals("http://www.w3.org/2001/XMLSchema#gYear", $index['http://example.org/subj']['http://example.org/pred'][0]['datatype']);
}
