and the US National Library of Medicine.

Application

ARKs may be assigned to anything digital, physical, or abstract. Below are examples, as of February 2023, as reported to the ARK Alliance by the listed organizations.

* genealogical records (15 billion FamilySearch)
* publisher content (157 million Portico)
* scientific records (22 million INIST)
* scanned texts (50 million Internet Archive)
* bibliographic records (27 million BnF main catalog)

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