Editing ISSN (section)

=== Linking ISSN ===
''ISSN-L'' is a [[unique identifier]] for all versions of the serial containing the same [[content (media)|content]] across different media. As defined by ''ISO 3297:2007'', the "linking ISSN (ISSN-L)" provides a mechanism for collocation or linking among the different media versions of the same continuing resource. The ''ISSN-L'' is one of a serial's existing ISSNs, so does not change the use or assignment of "ordinary" ISSNs;<ref>{{cite web |author= |title=Linking ISSN (ISSN-L) |url=http://www.nationallibrary.fi/publishers/issn/issnl.html |url-status=dead |archive-url=https://web.archive.org/web/20150926075657/http://www.nationallibrary.fi/publishers/issn/issnl.html |archive-date=26 September 2015 |access-date=23 December 2018 |website=www.nationallibrary.fi}}</ref> it is based on the ISSN of the first published medium version of the publication. If the print and online versions of the publication are published at the same time, the ISSN of the print version is chosen as the basis of the ''ISSN-L''.

With ''ISSN-L'' is possible to designate one single ISSN for all those media versions of the title. The use of ''ISSN-L'' facilitates search, retrieval and delivery across all media versions for services like [[OpenURL]], [[library catalogue]]s, [[search engine]]s or [[knowledge base]]s.