An ISSN is an 8-digit code used to identify newspapers, journals, magazines and periodicals of all kinds and on all media–print and electronic.
An ISSN (International Standard Serial Number) identifies all continuing resources, irrespective of their medium (print or electronic):
In many countries, an ISSN is mandatory for all publications subject to the legal deposit.
The ISSN takes the form of the acronym ISSN followed by two groups of four digits, separated by a hyphen. The eighth digit is a check digit calculated according to a modulus 11 algorithm on the basis of the 7 preceding digits; this eighth control digit may be an “X” if the result of the computing is equal to “10”, in order to avoid any ambiguity.
e. g.:
The ISSN role is to identify a publication.
It is a digital code without any intrinsic meaning:
The ISSN is associated with the title of the publication. If the publication is modified significantly, a new ISSN must be assigned.
For a print publication, the ISSN should be shown:
For a publication in electronic media, the ISSN should be shown:
If a publication is identified by ISSN and ISBN, both of these identifiers should be mentioned.
As an identifier, the ISSN is used as part of the GTIN 13 barcode.
The GTIN 13 code is comprised of 13 digits. It is the most widely used commercial distribution code in the world.
It is shown on all marketed products.
GS1, an international agency located in Brussels, manages it internationally.
For serial publications, the GTIN 13 barcode is structured as follows:
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