In this fulfillment data model, there is a strict separation between logical commercial order lines and physical warehouse shipment lines:
order.orderItems[]: Represents the commercial/storefront lines purchased by the customer. When a customer orders a bundle/kit (e.g.TWIST RING BUNDLE), it is decomposed into its constituent physical component products, linked together by a sharedorderSku.id.shipments.contents[]: Represents discrete physical carton lines packed in a warehouse box. Each content line corresponds to a physical warehouse SKU (itemMaster), containing the quantity packed and attribution references (orderItems[]) pointing back to the commercial order lines fulfilled.