Zend FR

id clef primaire
parent_id clef secondaire 
nom

class Application_Model_DbTable_Productscat extends Zend_Db_Table_Abstract
{

    protected $_name = 'productscat';
    protected $_primary = 'id';

    protected $_dependentTables = array('Riders','Pratique');

    protected $_referenceMap    = array(
        'Productscat' => array(
            'columns'           => 'parent',
            'refTableClass'     => 'Productscat',
            'refColumns'        => 'id'
        ));

}