CrossRef 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.
The oldest CrossRef DOIs represent articles from 1665 with issues of the Royal Society’s Philosophical Transactions. In fact, 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.
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 organizations like the Information Network for the Availability of Scientific Publications (INASP).
Hat Tip: Jill O.
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