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{{short description|ISO standard unique string identifier for a digital object}} …s://web.archive.org/web/20160617031837/https://www.iso.org/obp/ui/#iso:std:iso:26324:ed-1:v1:en | url-status = live }}</ref> DOIs are an implementation of

…tandardization]] (ISO) and was published in 1970 as international standard ISO 2108 (the 9-digit SBN code can be converted to a 10-digit ISBN by prefixing …219215516/http://commerce.bowker.com/standards/home/isbn/about_information_standards.asp |url-status=dead }}</ref><ref>{{cite web |first=Daniel |last=Gregory |u

…b |url=http://www.bl.uk/bibliographic/issn.html |title=Collection Metadata Standards |publisher=British Library |access-date=14 July 2014 |archive-date=15 July …issn.org/understanding-the-issn/standardization/ |url-status=live }}</ref> ISO subcommittee [[TC 46/SC 9]] is responsible for maintaining the standard.