The other day, on the #ACA2016 twitter feed (from the archivists in Canada, not the counsellors in Singapore), @attemptress (Kate Guay) gave a nice presentation on linked open data and some of the tools that help or hinder us in making connections. One of the tools she demonstrated was a handy dandy crosswalk from the people at Artefactual, which looked at the ICA standards, Dublin Core, the American Describing archives: a context standard (DACS), the Canadian Rules for Archival Description (RAD) and Encoded Archival Description (EAD). The Australian series registration system (SRS) as explained in Describing archives in context (DAiC) was missing.
When I was working on the transfer from the SRNSW archives management system (known as BOS), also used by SROWA, to AtoM, my colleague, Michele Keogh, and I created a crosswalk for the fields in both, and then crosschecked them against the ICA standards and DAiC. DAiC itself also has a crosswalk for the series registration and ICA. It may be time to make them more generally available on the interwebs.
The other thing that was immediately apparent was that EAD, which is used a lot for linking archival data, does not have a field for creator of the archive being described. This is possibly because it is described in EAC (Encoded Archival Context), but it does seem an obvious gap in any connections we want to make.