public function build( $projects, $meetings )
	{
		$tree		= new XML_DOM_Node( $this->title );
		$cal		= new XML_DOM_Node( "vcalendar" );
		$cal->addChild( new XML_DOM_Node( "version", "2.0" ) );
		foreach( $projects as $project )
		{
			$start		= strtotime( $project['start'] );
			$end		= strtotime( $project['end'] );
			$event		= new XML_DOM_Node( "vevent" );
			$start		= new XML_DOM_Node( "dtstart", date( "Ymd", $start ) );
			$end		= new XML_DOM_Node( "dtend", date( "Ymd", $end ) );
			$summary	= new XML_DOM_Node( "summary", $project['name'] );
			$event->addChild( $start );
			$event->addChild( $end );
			$event->addChild( $summary );
			$cal->addChild( $event );
		}

		foreach( $meetings as $meeting )
		{
			$start		= strtotime( $meeting['start'] );
			$end		= strtotime( $meeting['end'] );
			$event		= new XML_DOM_Node( "vevent" );
			$start		= new XML_DOM_Node( "dtstart", date( "Ymd", $start ) );
			$end		= new XML_DOM_Node( "dtend", date( "Ymd", $end ) );
			$summary	= new XML_DOM_Node( "summary", $meeting['name'] );
			$event->addChild( $start );
			$event->addChild( $end );
			$event->addChild( $summary );
			$cal->addChild( $event );
		}
		$tree->addChild( $cal );

		$builder	= new FS_File_iCal_Builder();
		$ical		= $builder->build( $tree );
		return $ical;
	}