WITSML - Inventory Component Schema Name or type of inventory item. Weight per item unit. Volume per item unit. Price per item unit, assume same currency for all items. Start quantity for report interval. Daily quantity adjustment/correction. Quantity received at site. Quantity returned to base from site. Quantity used for the report period Cost for the product for the interval. Amount of item remaining on location after all adjustments for the report interval. Unique identifier for the inventory.