Hi! I have now figured out a few SRU-Mappings for services.dnb.de authorpersonal = BBG="Tp*" and dnb.per authorcorp = BBG="Tb*" and dnb.koe title = BBG="Tu*" and dnb.tit https://www.dnb.de/DE/Professionell/Metadatendienste/Datenbezug/SRU/sru_node... https://services.dnb.de/sru/dnb?operation=explain&version=1.1 It is crucial that the 'BBG="?" and '-part comes before the actual field mapping because `_translate_query` will just mangle the fieldname and append the value entered by the user to the mapped fieldname (or at least thats how I interprete the code.) I guess those could be improved, but my head is spinning enough already. Greetings, domm -- #!/usr/bin/perl https://domm.plix.at for(ref bless{},just'another'perl'hacker){s-:+-$"-g&&print$_.$/}