DOI Primer highlights the structure and purpose of the DOI system, indicating its role in managing digital content.
The Digital Object Identifier (DOI) system is like a digital address book: One DOI name resolves to information on the location of the content. A DOI name can be assigned to any physical, digital, and abstract entity of any degree of granularity. The DOI system aims to facilitate persistence, data updates, interoperability, extensibility, and content management.
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Hartgerink et al. (2022) studied this question.