An ISSN can be identified from the abbreviation ISSN followed by two groups of four digits (e.g., ISSN 0780-4784). The ISSN contains no information on the country, community or language of publishing.
The ISSN is marked in a prominent place on the front cover, title page, masthead or back cover of each volume or issue of the periodical. The ISSN for magazines will be marked in the top right corner of the front cover.
For CD-ROMs, the ISSN is marked on the first screen of the recording, as well as on the CD-ROM disc and its case.
For online resources, the ISSN is marked on the home page or first screen, ideally close to the title of the publication. The ISSN is not marked for individual articles.
It is also recommended that the ISSN be recorded in the meta tag of the head element of the HTML text.
If the publication appears in print as well as online, both identifiers must appear in both versions:
ISSN 0356-2751 (Print)
ISSN 1458-8013 (Online)
ISSN FOR MONOGRAPHIC SERIES
If the publication is part of a series, the name of the series will be indicated on the title page along with the volume number. The overleaf of the title page must feature the ISSN identifier of the series.
The individual volumes of series consisting of monographs (e.g., dissertation series) usually have an ISBN in addition to an ISSN. Both identifiers must be marked one under the other on the reverse side of the title page and back cover, e.g.,
If the publication is part of two or more series, the ISSN identifiers will be marked in the following manner:
ISSN 0784-8307 = Housing
ISSN 0784-9311 = Living conditions
NB! The number of the volume must not be added to the ISSN identifier, for example, ISSN 0784-8307-34.
Even if the ISSN is incorporated into an EAN bar code, it must also be displayed separately on the publication.
Different parts of a monographic series must have separate numbers.
ISSN AND BARCODE
The EAN barcode in the GTIN (Global Trade Item Number) can be created on the basis of the ISSN. The GTIN begins with the prefix 977, which is followed by the 9 digits of the ISSN without hyphens or the check digit calculated by the GTIN code system. The check digit may be calculated with the online calculator (see link below). To use the calculator, enter the prefix 977, the ISSN without hyphens or the check digit (or the letter X) and two zeroes in the GITN-13 section. Drop the first zero from the code provided by the calculator to receive the 13-digit GTIN code.
The ISSN must always be legible on the publication. Information on printing the ISSN-based barcode onto the publication can be requested from printing houses. The Finnish ISBN Agency distributes only ISBNs; each publisher is responsible for obtaining an EAN code.