As Tim says, Sword is the better option, but you need some
knowledge, a little customisation, AND access to both OJS and
Dspace systems...
But if you can not install the SWORD plugin in OJS and activate
the Swrod protocol in Dspace, we use, for a project long time ago,
the OJS functionality "export to XML" This plugin is always
installed in OJS... A full journal (or selected volumes) can be
exported to XML (including the PDf themselves, in binary form,
useless)
Then, we write some transformations to SIP format, AND made some wget or curl to the actual PDFs... The process is a bit cumbersome, but it is able to keep all the metadata info and retrieve the files... After all, the SIPs are ingested into Dspace..
Best luck
Emilio
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