Hi all I would like to use Koha to manage old and rare books according to the rules what habe been established by the Informationsverbund Deutschschweiz (http://kids.informationsverbund.ch/kids_deutsch/a0kidsinh.pdf). In part these rules are a translation of the AACR with some additions. As much as I have understood there are three additions to the default MARC framework that comes with Koha: 1. 752 $d is used for Place of publication in an authorized form. Therefore it is linked to a thesaurus containing authorized names of cities. 2. A new MARC-field 901 is used for persons connected with the specific item. They are specified by 8 different first indicators (autograph, marginalia, owner ... but I think 4 of them are not item-specific). 3. A new MARC-field 902 is used for corporate names connected with the item. Again there are 6 first indicators (owner, publisher ... again not all item-specific). What have I done so far? I created a new MARC framework for old book. I copied the subfields from 700 to 901, from 710 to 902 I linked 901 $a to the thesaurus PERSO_NAME, 902 $a to CORPO_NAME I added in etc/koha/zebradb/marc_defs/marc21/biblios/record.abs: melm 901$9 Cross-Reference,Koha-Auth-Number melm 901$a Author,Author:p melm 901$n Thematic-number melm 901$t Author-title,Name-and-title,Title,Title-uniform melm 901 Author,Author:p,Author-name-personal,Name,Editor,Personal-name melm 902$t Author-title,Name-and-title,Title,Title-uniform melm 902$a Name-and-title melm 902$9 Koha-Auth-Number melm 902 Author,Author:p,Corporate-name,Name (I copied those sections from 700 and 710) With these changings I can find the persons and the corporate authorities connected with the records of my old books. I can't do a specific search for them (for example: the owner of a book without having all the records in wich he/she is an author). In my next step I tried to make the authorized Place of publication usable. I created first a new type of authority record (Erscheinungs- oder Druckort), as suggested in http://kids.informationsverbund.ch/kids_deutsch/aut.pdf. I copied the framework for geographical names and added a field 152 with the subfields $d Name of the place, $6 and $8 I added in etc/koha/zebradb/marc_defs/marc21/authorities/record.abs # Ansetzung Erscheinungsort melm 152$d Name-geographic-heading:w,Name-geographic-heading:w,Name-geographic-heading:s,Name-geographic:w,Name-geographic:p,Heading:w,Heading:p,Heading:s,Heading-Main:w,Heading-Main:p,Heading-Main:s,Match:w,Match:p,Match-heading:w,Match-heading:p melm 152 Name-geographic:w,Name-geographic:p,Name-geographic:s,Heading:w,Heading:p,Heading:s,Match:w,Match:p,Match-heading:w,Match-heading:p And in etc/koha/zebradb/marc_defs/marc21/biblios/record.abs melm 752$d Name-geographic melm 752$9 Koha-Auth-Number melm 752 Name-geographic and hoped that would work too. Unfortunatly that's not the case. I can't search for the places. What is my mistake? Are my additions for the fields 901 and 902 correct? Greetings Beda