Hi there, We use koha 3.02.02.00, and I've recently had to make a number of corrections to our records using SQL statements that basically did a search & replace in the 'marcxml' field of the 'biblioitems' table. An example of such a query is as follows: UPDATE biblioitems SET marcxml = REPLACE( marcxml, '<datafield tag="610" ind1="0" ind2=" ">\n <subfield code="a">Text A</subfield>', '<datafield tag="610" ind1="0" ind2=" ">\n <subfield code="a">Text B</subfield>' ) ; This worked as expected and I can see the changes I've made when browsing through book records in koha's OPAC. My question is: do I also need to edit the contents of the 'marc' field? According to the man page of C4::Biblio ( http://perldoc.koha-community.org/C4/Biblio.html): "In the 3.0 version of Koha, the authoritative record-level information is in biblioitems.marcxml". So, it looks like I should be OK with editing the marcxml data only, but wanted to double-check with someone from this mailing list who knows more about koha than I do. Thanks in advance for your help. Kind regards, Andreas