For a while now, we don’t know exactly since when, the DOI is missing in the OAI export. But only when we use the URL with /index/oai?verb=ListRecords&metadataPrefix=oai_dc&set=journalname.
When using /journalname/oai?verb=ListRecords&metadataPrefix=oai_dc&set=journalname it does go well. But this is not an option because only the general (/index/) is called by OCLC’s digital collection gateway harvester.
How can we solve this?
This is on our OJS 3.2.0-3 environment, but we have the same thing on our test environment where we are running 3.3.0-6.