30 millionth DOI for CrossRef

CrossRef, a multi-publisher linking association, announced that it has recently registered its 30 millionth DOI (Digital Object Identifier). The landmark DOI registration was completed by The American Physical Society for its journal Physical Review E (doi:10.1103/PhysRevE.76.055201).

Of the over 6.5 million DOIs created and assigned during the past year, a large number are associated with archival, or back-file, journal articles, as several large publishers have recently undertaken extensive retro-digitisation projects. This includes the Royal Society, Elsevier, Springer, Sage, Kluwer, Wiley, Blackwell, and the American Association for the Advancement of Science.

CrossRef is an independent membership association founded and directed by publishers. It seeks to improve access to published scholarship through collaborative technologies. The Company operates a cross-publisher citation linking system, and is the official DOI registration agency for scholarly and professional content.