Probably not very easy to do, either.

There's "Export to XML" and "Export to CSV" (or thereabouts). I want "Import from XML" or "Import from CSV".

Just a way to change attributes (title, artist, source...) from a loadable file. I could in that case run something to redo capitalization, or do a database lookup and populate years, or something like that, and be able to upload the data other than by hand.

Just an idea, and quite likely not one worth pursuing.