In 2018 the California Digital Library (CDL) and DuraSpace announced a collaboration aimed at building an open, international community around Archival Resource Keys (ARKs) and their use as persistent identifiers in the open scholarly ecosystem.
Over 550 institutions (research, not-for-profit, private, government) across the world have registered to use ARKs. They’ve created an estimated 175 million ARKs with publicly resolvable links to objects (digital, physical, people, places, etc).
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