CrossRef, the cross-publisher reference linking service, will drop its DOI retrieval fees for all members and affiliates starting in January 2004. This move gives all CrossRef users unlimited access to DOIs. The decision by the CrossRef Board to drop DOI retrieval fees is the latest strategic move intended to open access to the CrossRef system. In May of this year, CrossRef made library accounts on its system completely free. CrossRef integrates with the OpenURL, and several local linking platforms now incorporate it; these include ExLibris, Serials Solutions, SISIS, Endeavor, Fretwell Downing, SIRSI, and Openly Informatics.
Some of the newest publisher members of CrossRef are: University of California Press, Walter de Gruyter, Ashley Publications, the International Journal of Psychoanalysis, the Human Factors & Ergonomics Society, the National Strength & Conditioning Association, ASTM International, Guilford Publications, the Society for Neuroscience, the Canadian Academic Accounting Association, the Japan Endocrine Society, the American Marketing Association, the European Association of Cardiothoracic Surgery, the Indiana University Mathematics Journals, and American Scientist. Additionally, several hundred thousand book and conference proceeding DOIs have been added to the CrossRef system, including 700 books from Oxford University Press. With these additions, CrossRef now covers over 8,700 journals and nearly 10 million individual content items.