So I have several questions:

1. What does a high (over the top) MARC Record look like both for the ISSN(s) and the article?
2. What is the overlap between RDA Core and Dublin Core?
3. What user tasks are left out between RDA full and RDA Core?

Some resources:

For RDA tips:
https://web.library.yale.edu/book/export/html/1733
https://libguides.nmstatelibrary.org/rda

RDA Core
https://www.loc.gov/aba/rda/pdf/core_elements.pdf
https://www.librarianshipstudies.com/2016/03/rda-core-elements.html
https://www.loc.gov/aba/rda/core_elements.html

RDA Core for serials: https://www.youtube.com/watch?v=AF2DDYczBeA
https://socialsci.libretexts.org/Courses/Sacramento_City_College/LIBT331%3A_Library_Cataloging_Procedures_(Li)/03%3A_Copy_Cataloging/3.04%3A_CONSER_RDA_Core_Elements_for_Serials