[Koha] isbn / ean issues

[alen vodopijevec]

  Hi,

I would like to show 13-digit ISBN (ean compatible) on opac .. We have 
13-digit isbn in 'biblioitems.isbn' but I'm not sure how to get this 
info in opac-detail.pl. Using 'normalized_ean' in template produces 
nothing :) because it implies having 024 field value..

I could add GetNormalizedEAN--something() function to do something 
similar as GetNormalizedISBN but I'm not sure what's the proper (Koha) 
way to achieve what I want.

So, how to properly handle 10 and 13 digit ISBN-s?

tnx,
--
alen