/**
  * Constructs PDF for schema export.
  *
  * @param string  $orientation page orientation
  * @param string  $unit        unit
  * @param string  $paper       the format used for pages
  * @param int     $pageNumber  schema page number that is being exported
  * @param boolean $withDoc     with document dictionary
  * @param string  $db          the database name
  *
  * @access public
  */
 public function __construct($orientation, $unit, $paper, $pageNumber, $withDoc, $db)
 {
     parent::__construct($orientation, $unit, $paper);
     $this->_pageNumber = $pageNumber;
     $this->_withDoc = $withDoc;
     $this->_db = $db;
 }