Hi David,

I don’t know how to fix it, but I do know that you can’t change an ISBN-10 into an ISBN-13 just by adding 978 in front of it. The check digit at the end of the ISBN changes as well.

There are various converter programs on the web, which take into account the check digit change as well. The easiest is at http://www.isbn.org/converterpub.asp, but if you need the actual calculations behind the conversion, you’ll need to do some research.

Hope this helps at least a bit,

Ann-Marie Breaux

YBP Library Services

From: koha-bounces@lists.katipo.co.nz [mailto:koha-bounces@lists.katipo.co.nz] On Behalf Of Hartman, David W. - GBTS Library
Sent: Friday, December 23, 2011 2:47 PM
To: Koha
Subject: [Koha] When importing records, question about matching rule

When importing records, my matching rule works when ISBN matches identically in both records .. so … I need to modify my ISBN matching rule so that it matches books that MAY have the prefix 978 in front of the ISBN.

Does anyone know how to modify the matching rule so that 978MATCH and MATCH will match?

My current rule is

Tag             020   (ISBN)

Subfield   a

Offset       3      ( I tried 3 so it would ignore the 978 but this did not work)

Length     0

Normalization rule :   blank

Happy Holidays everyone!!!

David W. Hartman
Global Business Technology Strategy Library
Team Disney 336N