System and method for managing electronic price label overlays

Abstract From the Canadian patent

A system and method of managing data for electronic price label overlays which automates printing of new and changed overlays. The method determines electronic price label information and price look-up file descriptions that have been added or changed for particular electronic price labels. Additions and changes in overlay data are marked and identified by the marks to create a print data file. Alternatively additions and changes are identified by a comparison of a first file with a second file containing the additions and changes. The system includes a number of storage media for storing the PLU file and the EPL data file, and a computer which determines a change in the PLU file or the EPL …