A broader approach to IDs (OCLC, PMID, PMCID, arxivID)
Per https://github.com/zotero/translators/issues/1016, I'd like to consider new fields for major ID categories. I use many books without ISBNs so having the OCLC in particular would be extremely helpful. (When I write for Wikipedia, I also use a citation export that has an OCLC field if we were to populate it.) I was advised to also bring PMID, PMCID, arxivID into the mix. What are the downsides to adding such support, aside from bloat? Looking for general feedback on the idea.