Requirements for changes to OAI interface MARC21

Dear Community,

we are planning to have some automated interface for connecting our OJS to our library catalogue. Our catalogue is in Germany and called K10plus (behind that is OCLC PICA/WinIBW).

We already got in contact with their service center and they mentioned they could connect to our OAI interface, however they have some change requests. They would like to add some identifier for the journal, so the article can be connected to the journal automatically (in our case the so called ZDB-ID, from the German Journal database ZDB) and give volume, number, year and pages in own subfields.

This is our link to the OAI:
And this would be some example article (using marc21 format):

What they need additionally:

Included in WLB-Forum (DE-600)2054088-7 volume:23 number:1 year:2021 pages:76–77

So my questions would be:

  • How and where could we add this other journal identifier? Could we save it somewhere centrally like the ISSN or would it be per article?
  • How can we change the OAI interface? If we would do it locally, it would be gone with the next update. Could it come with some central update? Or do we need to build our own plugin (similar to e.g. the DNB plugin GitHub - ojsde/dnb: OJS plugin that exports full texts and metadata to the Deutsche Nationalbibliothek (DNB))?
  • Could we somehow export marcxml files with the mentioned requirements? It would be also possible to put some files on their FTP-server.

This is the link to our journal WLBforum and we are using version
They want to use this protocoll.

Metadata Format
metadataPrefix marcxml

Thanks a lot for your support and have a nice weekend!
Best regards

Hi all,

Our question might look complicated. But our main question is: what is the correct process to do future-proof changes in the OAI interface?

Somehow the code was not shown correctly. Below an update of what is needed additionally for OAI harvester:

<datafield tag="773" ind1="0" ind2="8" >
<subfield code="i" >Included in</subfield>
<subfield code="t" >WLB-Forum</subfield>
<subfield code="w" >(DE-600)2054088-7</subfield>

<datafield tag="773" ind1="1" ind2="8" >
<subfield code="g" >volume:23</subfield>
<subfield code="g" >number:1</subfield>
<subfield code="g" >year:2021</subfield>
<subfield code="g" >pages:76–77</subfield>

Best regards