[Koha] How to import loans data into Koha?

[Mark Alexander]

Excerpts from Chris Brown's message of 2017-08-15 21:06:52 +0100:
> We are migrating records from a few small community libraries (currently
> held as a fancy spreadsheet) into Koha 17.05. I have figured out how to
> migrate the biblio records, items and patron data but I was wondering if
> there is a way to import data on current issues (loans)?  All we really
> need to import is the item ID, the patron ID and the due-back date.

I did this by writing a script to convert the loan list generated by
our our old library system (Mandarin) into a KOC file (Koha Offline
Circulation File), and then importing that.  The KOC file format is
defined here:

https://wiki.koha-community.org/wiki/Koha_offline_circulation_file_format