Preface Standards development within the Information Technology sector is harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 on Information Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO member body for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of the International Telecommunication Union (ITU), Canada participates in the International Telegraph and Telephone Consultative Committee (ITU-T). This Standard supersedes CAN/CSA-ISO/IEC 15420-02 (adoption of ISO/IEC 15420:2000, first edition, 2000-12-15). At the time of publication, ISO/IEC 15420:2009 is available from ISO and IEC in English only. CSA will publish the French version when it becomes available from ISO and IEC. Scope This International Standard specifies the requirements for the bar code symbology known as EAN/UPC. It specifies EAN/UPC symbology characteristics, data character encodation, dimensions, tolerances, decoding algorithms and parameters to be defined by applications. It specifies the Symbology Identifier prefix strings for EAN/UPC symbols. Data content and the rules governing the use of this symbology are outside the scope of this International Standard; they are defined in the GS1 General Specifications (see bibliography).