I haven't seen yet 'biblio' but I suppose there is a way to target Z39.50 hosts in order to download records. I would be nice to manage Z39.50 list from API. It would be nice also to be able to register a callback function to be called after biblio record has been retrieved from z3950 server and before being displayed in 'biblio'. This function (one by z3950 target) would be able to clean record, do whatever on it, create items, deduplicate, etc.