Zend FR

class Content_Model_DbTable_Item extends Zend_Db_Table_Abstract {
    
    protected $_name = 'item';
    protected $_primary = 'id';
    protected $_dependentTables = array('Content_Model_DbTable_Page');
}

class Content_Model_DbTable_Page extends Zend_Db_Table_Abstract {
    
    protected $_name = 'page';
    protected $_primary = array('id_item', 'page_number');
    protected $_sequence = false;
    
    protected $_referenceMap = array(
        'Item' => array(
            'columns' => 'id_item',
            'refTableClass' => 'Content_Model_DbTable_Item',
            'onDelete'          => self::CASCADE,
    ));
}