module for PMID to DOI conversion

For MDC, mainly PMIDs are currently provided instead of DOIs in the Publication Identifier field. We are still waiting for an answer from the MDC. Alternatively, an extra loop could be added. But not for version 2. This extra loop would then be via the PubMed ID PMID, which is usually listed as the resource identifier. e.g. in this record: https://edoc.mdc-berlin.de/cgi/oai2?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:edoc.mdc-berlin.de:21002 The API could be used to retrieve the DOI in JSON format. https://www.ncbi.nlm.nih.gov/pmc/utils/idconv/v1.0/?ids=34629465&idtype=pmid&format=json However, we do not know whether we are running into any limits again. This would also have a generalizing aspect, as PubMed is a comparatively accepted publication repo. It would be interesting to see whether the resolution of PMIDs would also result in an increase in recognized publications in the dashboard at other centers.