Variation-level SKU that uniquely identifes a variation within the listing identified by ItemID. Only applicable when the seller listed the item with variation-level SKU (Variation.SKU) values. Retrieves all the usual Item fields, but limits the Variations content to the specified variation.
As buyers should not know a variation's SKU, this field should only be used when the item's seller is setting a note on the variation.
Ignored if used in combination with TransactionID.
See the
Field Index to learn which calls use SKU.