A StockItemRequest asks for Booking or Replenishment concerning a StockItemStockLevel:<br/><br/>        • Booking request: a booking request might come from a CustomerOrder in progress or simply from a salesperson that plan to place a huge quantity to a Customer. It carries a valid period to avoid freezing the stock.<br/><br/>        • Replenishment: a replenishment request is triggered when the quantity is under the reorderLevel. The status is In progress and the end date (from validPeriod) is specified when a corresponding purchase or movement from one StockLocation to another has been triggered.<br/><br/>These requests might be cancelled (for example if the Customer abort his order).<br/><br/>A StockItemRequest might be Received if the corresponding StockItemShipment is completed and the content has not yet been checked.<br/>