public function setTitle($string, $id, $type = 'main', $sequence = 1){
		$sequence = max(1, $sequence);
		// Add title
		$title = $this->dom->metadata->addChild('title', $this->h($string), Schemas::DC);
		$title['id'] = $id;
		// Add title meta
		$meta = $this->dom->metadata->addChild('meta', $type);
		$meta['refines'] = '#'.$id;
		$meta['property'] = 'title-type';
		// Add sequence
		$meta = $this->dom->metadata->addChild('meta', $sequence);
		$meta['refines'] = '#'.$id;
		$meta['property'] = 'display-seq';
	}