In OPS, when a preprint has been published in a journal, the DOI of the published article can be added to the preprint metadata, for display on the public interface.
C.f.: https://docs.pkp.sfu.ca/learning-ops/en/editorial-workflow#preprint-status
At the PKP Sprint in Helsinki and within internal discussions, additional use cases for this kind of submission interlinking have been proposed. Specifically:
- Reviews: reviews may be copyedited and then published, and linked to the reviewed submission
- Related Submissions: submissions may be tagged as related to another submission (errata, lexicons, etc)
- Preprint versions: submissions may link back to their preprint versions.
In the case of Reviews and Preprints, this interlinking relates directly to CrossRef review metadata and posted content metadata.
The use of DOIs for this interlinking is attractive, but there may be an argument for a general use case of an arbitrary xlink to form content relationships.