Structure of the ISSN


The ISSN is a numeric code consisting of eight digits. Its elements -unlike those of the ISBN identifier used for books ? have no signification in themselves and do not contain any information referring to the origin or contents of the publication. The eighth digit is a control digit calculated on the basis of the seven preceding digits and may be an "X" if the result of the computing is equal to ten.

The ISSN is displayed in two subgroups containing four digits each, separated by a hyphen and preceded by the acronym ISSN.

For example:

  •     ISSN 0251-1479
  •     ISSN 1050-124X