The shipment object and the allowed CRUD operations on the related resource endpoint
The default inventory model strategy is no split, meaning that just a single shipment from a single stock location is always created. If a different strategy is selected the orders fulfillment can be split into more shipments for one of the following reasons:
The combination of stock locations and shipping categories determines the number of shipments. Each shipment gets fulfilled separately.
In case the inventory model strategy is left as default – no split – shipping categories are ignored: just one shipment is created with no specific category associated.