[Koha] Non-public notes

I have a situation where we want to have non-public notes attached to biblio records. There doesn't appear to be any way of doing this, so I was thinking of doing something along the lines of having (MARC21) 595-599 as private biblio notes, and 590-594 as public ones. I'm wondering if a) there's a better approach, and b) if this is something that would be generally useful and worth upstreaming. I think it'll take little more than a change to the XSLT/templates for the OPAC. -- Robin Sheat Catalyst IT Ltd. ✆ +64 4 803 2204 GPG: 5957 6D23 8B16 EFAB FEF8 7175 14D3 6485 A99C EB6D