Worth reading the Wikipedia article on the Handle System, of which the DOI system is a subset: https://en.wikipedia.org/wiki/Handle_System https://en.wikipedia

Worth reading the Wikipedia article on the Handle System, of which the DOI system is a subset: https://en.wikipedia.org/wiki/Handle_System https://en.wikipedia.org/wiki/Handle_System All handles that start with 10 are DOIs. Handles that start with 20 are issued by CNRI. I don't know of a published list of prefixes, but it would be easy to investigate since entering the prefix into the appropriate resolver will bring up information on the issuing authority: - https://hdl.handle.net/20.1000 https://hdl.handle.net/20.1000 : "Prefix for CNRI licenses." - https://doi.org/10.14288 https://doi.org/10.14288 : "Datacite prefix 8/22/13" Not all have the DESC field, but you can figure out who these are from other fields: - https://doi.org/10.14288 https://doi.org/10.14288 : CrossRef & American Chem. Soc. publications - https://doi.org/10.1038 https://doi.org/10.1038 : CrossRef & Nature publications etc...