This documentation relates to release candidate version of the DataCite DOI plugin, available at 
DataCite DOI Manager Screen
The process for registering and minting DOIs is now managed via the DataCite DOI Manager screen, available via an eprint item’s Actions tab.
The DataCite DOI Manager is only available for items in the review queue or the live archive, and only to those users with editor or administrator permissions.
Each eprint record has its own DOI that can be registered with DataCite, derived from the repository’s DataCite prefix (e.g. 10.xxx), the repository’s name, and the eprint’s ID.