I've hit a snag with the OAI stuff which is almost certainly an eXist bug: when I generate an OAI record individually, passing an xml:id to the function that does it, then all the people, places etc. are included, but when I try to generate records in a loop by passing all the ids in, then that information is not included. I've tried configuring extra indexes and all sorts of other workarounds but it seems insuperable, and I'm certainly not going to generate 7,143 records one at a time. I'm now forced to look at updating to the new build of eXist/Cocoon to see if the bug is present there. If it's not, then that's a solid reason for doing the migration right now.