Identifies the StoreSearch codes (e.g., for FindItemsAdvanced requests).
(in) Within a single store for all items (specify a store in the appropriate input field).
(in) Within a single store for auction items (specify a store in the appropriate input field).
(in) Across all stores for basic fixed price items, Store Inventory format items, and auction items with Buy It Now.
(in) Within a single store for basic fixed price items, Store Inventory format items, and auction items with Buy It Now (specify a store in the appropriate input field).
(out) Reserved for internal or future use.