$xpath->registerNamespace("atom", NAMESPACE_ATOM1);
$xpath->registerNamespace("thr", NAMESPACE_THREAD);
$xpath->registerNamespace("at", NAMESPACE_TOMB);
$xpath->registerNamespace("atom", NAMESPACE_ATOM1);
$xpath->registerNamespace("thr", NAMESPACE_THREAD);
$xpath->registerNamespace("at", NAMESPACE_TOMB);