X12.852, the Product Activity Data document, is a message format standard used by retailers to transmit point of sale data to suppliers via electronic data interchange. These files instruct a supplier on the units sold and units on hand at a store and item level. X12.852 files are typically provided on a daily or weekly basis. These files are usually referred to as "product activity data." The Data Interchange Standards Association provides detailed specifications for EDI documents and helps to control international standards. For each item - Item description- Item UPC