Reference linking services provider CrossRef, US, has announced that it has surpassed 40 million metadata records for scholarly content. Each of these records includes a CrossRef Digital Object Identifier (DOI), which allows the content to be accessed by a permanent link on the Internet.
Of these 40 million items, 87 percent are from journals. Content from scholarly books and reference works makes up more than 5 percent and another 5 percent is from conference proceedings. CrossRef contains more than 650,000 records from the 17th, 18th, and 19th centuries as well as the tens of millions from the 19th and 20th centuries. The oldest CrossRef DOIs represent articles from 1665 with issues of the Royal Society’s Philosophical Transactions.
CrossRef includes metadata from more than 2900 publishers, 20,000 journal titles, and 100,000 book titles, which represent CrossRef’s fastest growing content type. Content comes from 6 continents, including publishers from low-income countries through arrangements with organisations like the Information Network for the Availability of Scientific Publications (INASP).
CrossRef currently has 804 voting members, representing 2950 publishers. CrossRef also serves more than 1500 libraries.
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