protected function writeTag($tagName, array $attributes, $content)
	{
		$xml = '<' . $tagName;
		foreach ($attributes as $attrName => $attrValue)
		{
			$xml .= ' ' . $attrName . '="' . htmlspecialchars($attrValue) . '"';
		}
		if ($content === '')
		{
			$xml .= '/>';
		}
		else
		{
			$xml .= '>' . $content . '</' . $tagName . '>';
		}

		return $xml;
	}