OAI-PMH for libraries

For libraries: Dublin Core records, and IIIF manifests of scans.

https://api.rebbehub.org/oai speaks OAI-PMH 2.0, so library catalogs and aggregators can harvest RebbeHub like any repository (it is on once the server names its administrators' address, OAI_ADMIN_EMAIL; see configuration).

Records: sefarim, sichos and letters, farbrengens, printings and recordings, as Dublin Core (oai_dc). Records are CC0.
Identifiers: oai:rebbehub.org:rh-…, the item's permanent id.
Dates: a record's datestamp is when the commit that last changed it was made; harvest by from and until (day granularity or seconds).
Sets: by kind (type:unit, type:event, type:publication…) and by RebbeHub set (set:rh-…); ListSets lists them.
Deletions are kept (deletedRecord: persistent): a deleted item answers with a deleted header.
Pages: a hundred records at a time, with a resumptionToken.
Words withheld for rights are never in a record.

Text

/oai?verb=Identify
/oai?verb=ListSets
/oai?verb=ListRecords&metadataPrefix=oai_dc&from=2026-09-01
/oai?verb=ListRecords&metadataPrefix=oai_dc&set=type:unit
/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:rebbehub.org:rh-7k2m9q4d

POST /oai takes the same arguments as a form.

IIIF#

Every scan RebbeHub serves has a IIIF Presentation 3 manifest, https://api.rebbehub.org/manifests/iiif/<scan id>.json: right to left, its page images, the PDF as its rendering, the credit as its required statement. Open it in any IIIF viewer (Mirador, Universal Viewer).