$this->elementStart('feed', array('xmlns' => 'http://www.w3.org/2005/Atom',
'xml:lang' => 'en-US',
'xmlns:thr' => 'http://purl.org/syndication/thread/1.0'));
$this->elementStart('feed', array('xmlns' => 'http://www.w3.org/2005/Atom',
'xml:lang' => 'en-US',
'xmlns:thr' => 'http://purl.org/syndication/thread/1.0'));