ProductIdentifier
Type could be ePID, MementoString as well as ISBN, UPC, EAN, Brand_MPN.
Types that use ProductIdentifier:
Calls that use ProductIdentifier:
Fields
European Article Number (EAN) value for books. (This is used more commonly in European countries.) If you know a book's EAN, you can use this instead of the eBay CatalogItem or Reference ID to search for that book.
See the Field Index to learn which calls use EAN.
eBay Product ID. eBay's global reference ID for a catalog product. On the eBay Web site, this is known as the "ePID". A reference ID is a fixed reference to a product (regardless of version). One reference ID can be associated with multiple ProductID values. The value should start with "EPID", for example "EPID30971438" (without quotes). You can find reference IDs for products by using GetProducts (or FindProducts in the Shopping API). You can also find the ePID on eBay's Web site.
If the primary and secondary categories are both catalog-enabled, this ID should correspond to the primary category (not the secondary category).
If the primary and secondary categories are both catalog-enabled, this ID should correspond to the primary category (not the secondary category).
See the Field Index to learn which calls use ePID.
ISBN-10 or ISBN-13 value for books. (The string length of ProductID indicates whether the ID is 10 or 13 characters.) If you know a book's ISBN, you can use this instead of the eBay CatalogItem or Reference ID to search for that book.
See the Field Index to learn which calls use ISBN.
eBay's unique identifier for a specific version of a product. This is the long alphanumeric ID that is returned from GetProductSearchResults and related calls. See the Trading API Guide for information about finding this type of product ID. (For the shorter ePID value that is displayed on the eBay Web site, see ProductReferenceID instead.)
See the Field Index to learn which calls use productId.
eBay Product ID.
See the Field Index to learn which calls use UPC.