ISO 8-2019 pdf free.In formation and documentation- Presentation and identification of periodicals. 4 Identification of periodicals — International Standard Serial Number (ISSN) Periodicals are identified worldwide via the assignment of an International Standard Serial Number and a key title. The ISSN is specified in Iso 3297 and it is an unambiguous numerical identifier that uniquely identifies a periodical title for searching, file matching, and other applications in libraries, information databases, the supply chain, rights management and other environments. It is necessary to obtain a separate ISSN for each medium version of a periodical as defined by the ISSN Manual. When the same periodical or other continuing resource is produced in different media for which different ISSN and key titles are assigned, then the ISSN of all medium versions shall appear together on each version in a prominent location, each with additional distinguishing information. The Linking ISSN (lSSN-L that collocates the medium versions shall also be displayed. An ISSN shall consist of eight digits from the code points in the range U+0030 to U+0039 corresponding to Arabic numerals 0 to 9. The last digit or check digit (extreme right, low-order position) can also use the Latin capital letter X (code point…