Product ID has an attribute of ProductIDCodeType and a string value.
Extending xs:string
Element ns:ProductID [type FindHalfProductsRequestType]
Element ns:ProductID [type FindReviewsAndGuidesRequestType]
Element ns:ProductID [type FindItemsAdvancedRequestType]
Element ns:ProductID [type HalfCatalogProductType]
Element ns:ProductID [type SimpleItemType]
Element ns:ProductID [type FindProductsRequestType]
Element ns:ProductID [type CatalogProductType]
Element ns:ProductID [type FindReviewsAndGuidesResponseType]