First set up the not-bibliographic stuff (roomkeys, lockerkeys, USBs, etc) since that will be easier than coding the bibLoad.pl script to deal with it.
Do some more parsing and load data into FOLIO (aka create rows in FOLIO's db tables)
The ILS considers certain fields to be "local" and so does not overlay them and we end up with (sometimes several) duplicates of the same field/data combination.
BE SURE TO UNIQ THOSE FIELDS BEFORE LOADING THAT DATA INTO FOLIO - see also how to uniq an array in Perl