public function testMediaType()
 {
     $lang = MwRdf::MediaType('text/html');
     $this->assertTrue($lang instanceof LibRDF_LiteralNode);
     $ns = MwRdf::getNamespace('dc');
     $this->assertEquals($ns . 'IMT', $lang->getDatatype());
     $this->assertEquals("text/html^^<{$ns}IMT>", "{$lang}");
 }
 public function testTimestampResource()
 {
     $res = MwRdf::TimestampResource(time());
     $this->assertTrue($res instanceof LibRDF_LiteralNode, get_class($res));
     $ns = MwRdf::getNamespace('dc');
     $this->assertEquals($ns . 'W3CDTF', $res->getDatatype());
 }