public function updateChangeset($id, $tags = array())
	{
		$token = $this->oauth->getToken();

		// Set parameters.
		$parameters = array(
			'oauth_token' => $token['key'],
		);

		// Set the API base
		$base = 'changeset/' . $id;

		// Build the request path.
		$path = $this->getOption('api.url') . $base;

		// Create a list of tags to update changeset
		$tagList = '';

		if (!empty($tags))
		{
			foreach ($tags as $key => $value)
			{
				$tagList .= '<tag k="' . $key . '" v="' . $value . '"/>';
			}
		}

		$xml = '<?xml version="1.0" encoding="UTF-8"?>
				<osm version="0.6" generator="JoomlaOpenStreetMap">
				<changeset>'
				. $tagList .
				'</changeset>
				</osm>';

		$header['Content-Type'] = 'text/xml';

		// Send the request.
		$response = $this->oauth->oauthRequest($path, 'PUT', $parameters, $xml, $header);

		$xmlString = simplexml_load_string($response->body);

		return $xmlString->changeset;
	}