Steven, The call number in 050 and 090 are for the manifestation of the work not the individual copy. 852, is for copy information, so that would not be a good choice to map the info to. Greg's records should have a field with copy info including a call number, location within his institution, cost, fund info and whatever his institution needs to attach to that copy. That is good for 852. 050 and 090 classification information is not copy related. The Functional Requirements for Bibliographic Records (FRBR) clear up some of the confusing aspects of our bib records. I never knew that LC used 090 for local call numbers, interesting bit of history. That explains why it is so common to see that field used. Sincerely, David Bigwood bigwood@lpi.usra.edu Lunar & Planetary Institute cataloging news: http://www.catalogablog.blogspot.com -----Original Message----- From: Steven F. Baljkas [mailto:baljkas@mb.sympatico.ca] Sent: Tuesday, September 09, 2003 12:58 AM To: Greg Lambert/Amigos; koha@lists.katipo.co.nz Cc: baljkas@mb.sympatico.ca Subject: Re: [Koha] 090 Fields Tuesday, September 9, 2003 00:50 CDT Hi, Greg, It's not unusual for ILS to use 090 for the call number used by the library. This is, in part, because LC used it for both Local Call Number and Shelf Location at different times in the past (I actually have a print-off of an old-enough USMARC Concise Format that lists the 090 that way with the notation obsolete) and when it was cleared for system developpers use, many remembered its past and kept it going. Unless you've dumped your database in migrating/upgrading the Koha, the info should still be there. Did the call numbers not end up in Koha somehow? How did you go about mapping your 090 into Koha? If it didn't work and you still have the original data, you might want to: · attempt mapping the 090 data into a properly formatted 852 field; or, as a stop-gap · select a 9xx number field that wasn't used in your data and isn't used in Koha and move the call numbers there with a global MARC editor (see the MARC tools pages at LC for MARCEdit) Or if Koha currently supports global edits of its MARC data (does it? I don't remember reading so) I suppose you could do it within the system. As for issues, I would guess that if the data did map, you'd now have items types of all the LC classes. That oughta be a neat wake-up call to patrons! ;-) As for the 001 field, yes, you're mostly right. Its formal definition is Control Number, that is, the number the ILS knows the item by, acting as a primary key for the database structure holding all the bibliographic records (i.e. it must be unique within the whole mass). Hope this helps. If you want some help with the 852 write me back off-list and I'll be glad to assist. Cheers, Steven F. Baljkas library tech at large Koha neophyte Winnipeg, MB CANADA