Academic Heritage in MARC records

I have long wondered how I might encode information contained in the https://academictree.org in MARC Authority Records. Obviously via MARC relator roles the information might be encoded within the bibliographic record. However, looking at the MARC 510 field on the linked record https://lccn.loc.gov/no2004069960, it seems that the MARC 500 field on authority Records might be used with several of the sub-fields.

Converting DC Subjects to Schema.org

DC has the ability to specify subjects such as UDC, LCSH or DDC. How would these be converted to schema.org?

{
"@context": "https://schema.org/",
"@type": "Book",
"name": "British Isles - A History",
"about": {
"@type": "DefinedTerm",
"@id": "https://id.oclc.org/worldcat/ddc/E48m7BJXdrm3XY4Xv86d88WGt3",
"name": "British Isles",
"termCode": "941",
"inDefinedTermSet": "https://id.oclc.org/worldcat/ddc/"
}
}

OLAC CMS options via XML

One plan for pushing language resources to the web en-mass before a full django application is available is to use Hugo and its XML input process to parse OALC/OAI-PMH files (generated with an OAI-PMH bash script) and then convert bibtex entries to xml (using Jabref or commandline) or JSON. The content issue to overcome is that pages in Hugo have to have front matter. The XML and JSON are both content and front matter (or visible front matter). I think I need to generate an .md file for each entry meaning XML data is not really that useful. But there may be hope

Zotero Plugins

Zotero is having a bit of an explosion with plugins. Really cool to see. Some of the ones I benefit from:

https://github.com/bwiernik/zotero-shortdoi

https://github.com/MuiseDestiny/zotero-reference
https://github.com/volatile-static/Chartero

https://github.com/panhaoyu/zotero-categorial-tags
https://github.com/syt2/zotero-addons

https://github.com/windingwind/zotero-actions-tags
https://github.com/PubPeerFoundation/pubpeer_zotero_plugin

https://github.com/jlegewie/zotfile

https://github.com/RoadToDream/ZotMeta

https://github.com/franzbischoff/zotero-pdf-metadata

https://github.com/github-young/zotero-better-authors

https://github.com/fkguo/zotero-inspire

https://github.com/ChenglongMa/zoplicate