Editing ISSN (section)

=== In EANs ===

ISSNs can be encoded in [[International Article Number (EAN)|EAN-13 bar codes]] with a 977 "country code" (compare the 978 "[[bookland]]" country code for [[ISBN]]s), followed by the 7 main digits of the ISSN (the check digit is not included), followed by 2 publisher-defined digits, followed by the EAN check digit (in most cases, this will not match the ISSN check digit, since they are each calculated in a different way).<ref>{{cite book|url=https://www.issn.org/understanding-the-issn/issn-uses/identification-with-the-ean-13-barcode/|title=Identification with the GTIN 13 barcode|publisher=ISSN International Centre|archive-url=https://web.archive.org/web/20200629062603/https://www.issn.org/understanding-the-issn/issn-uses/identification-with-the-ean-13-barcode/|archive-date=June 29, 2020|url-status=live}}</ref>