> And yes, I haven’t seen any Dublin Core records “in the wild” either, but
based on the information above, they apparently can exist. Thank you.

Something like that is used as part of the export/import format in dspace.
The Object is a zip file with the content files and metadata files within.
see
https://wiki.duraspace.org/display/DSDOC18/Importing+and+Exporting+Items+via+Simple+Archive+Format

The format is actually pretty easy to generate in your choice of scripting
language.

cheers
stuart

--
...let us be heard from red core to black sky