[rules-users] OR in more than one level

Hi, How can I use OR in second level attributes ? (attributes that´re in a aggregate Class of a aggregate Class of main Class) when $trigger : ArrayList( size >= 1 ) from collect( PromotionShoppingCartLine( productItem.sku == "1" || productItem.sku == "2" ) from $promotionShoppingCart.promotionShoppingCartLines ) then . . I can´t use "productItem.sku" (sku attribute inside productItem attribute that´s inside PromotionShoppingCartLine class) if I´m using the || (OR), but if I use && (AND) all works fine. thanks in advance, Sergio Stateri Jr. stateri(a)gmail.com -- Sergio Stateri Jr. stateri(a)gmail.com