public function identifyFromTree( $tree )
	{
		$this->type		= "";
		$this->version	= "";
		$nodename	= strtolower( $tree->getNodeName() );
		switch( $nodename )
		{
			case 'feed':
				$type	= "ATOM";
				$version	= $tree->getAttribute( 'version' );
				break;
			case 'rss':
				$type	= "RSS";
				$version	= $tree->getAttribute( 'version' );
				break;
			case 'rdf:rdf':
				$type	= "RSS";
				$version	= "1.0";
				break;
		}
		if( $type && $version )
		{
			$this->type		= $type;
			$this->version	= $version;
			return $type."/".$version;
		}
		return false;
	}