$xs = new XMLStringer();
$xs->elementStart('html', array('xmlns' => 'http://jabber.org/protocol/xhtml-im'));
$xs->elementStart('body', array('xmlns' => 'http://www.w3.org/1999/xhtml'));
$xs = new XMLStringer();
$xs->elementStart('html', array('xmlns' => 'http://jabber.org/protocol/xhtml-im'));
$xs->elementStart('body', array('xmlns' => 'http://www.w3.org/1999/xhtml'));