[Koha-devel] about MARC format
paul POULAIN
paul.poulain at free.fr
Mon Sep 9 03:06:02 CEST 2002
This mail is primarily for Steve and continues an IRC conversation we
had on friday, but I think it could interest other koha developers and
readers of this ml.
The problem :
We have 2 problems with MARC-DB structure :
The 1st, which is solved, was that repeatable tags we not rightly stored
in our structure : thus, it was hard to differenciate lines. The problem
will be solved by adding a "tag number" field in the DB. Should be cvsed
soon...
The 2nd, which is still to solve, is multiple-items support. We plan to
support many MARC (MARC21, UNIMARC...) by having a parameter table. But
the BIG problem is that koha "items" are managed completly differently
in MARC21 and in UNIMARC. In fact, in true-UNIMARC they are not
supported... In france, they are supported by a "almost-official"
document, the "995 tag", which defines the 995 tag as the koha-item field.
So, when there are more than 1 item of a given biblio, how to manage
them in MARC-DB. Quite impossible with actual DB structure.
I've had a simple idea during the we, which, I'm almost sure, is the
best one :
In our MARC sructure, we have a old-DB-"biblio" field that links the old
DB and the MARC one. We should add a "koha-item" field in the DB that
links a old-DB item and a "MARC-item".
In the MARC-API, we should add a MARCadditem, MARCmoditem and
MARCdelitem sub.
I'll try this very soon, unless someone (steve ?) points me an error.
--
Paul
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