We have a small library using dewey. I'm trying to figure out how to get dewey decimal numbers into Koha without error. BACKGROUND: MARC tags ---------------------------- When we do a z39.50 search we often don't get the dewey decimal number. According to http://www.loc.gov/marc/bibliographic/bdsummary.html there are the following dewey related MARC fields: 082 Dewey Decimal Classification Number 083 Additional Dewey Decimal Classification Number 090 - Shelf Location (AM) [OBSOLETE, 1977] [USMARC only] 090 - Local Call Number [OBSOLETE, 1982] 091 - Microfilm Shelf Location (AM) [OBSOLETE, 1977] [USMARC only] 852 Location I have also found fields like this at some libraries: 092 _a428.2 (tag 92, subfield a = dewey decimal number) _bOCO (tag 92, subfiedl b = dewey decimal number) Koha has this mapping by default: tag 952, subfield o = items.itemcallnumber (full call number) BACKGROUND: our initial import --------------------------------------------- Originally we imported records from Athena. Athena uses tag 952, subfields k,h,i,m (k=Call number prefix, h=Classification part, i=Item part,m=Call number suffix). We mapped (Koha tag 952, subfield o) to (Athena tag 852, concatenation of subfields k,h,i,m). We used this script:http://contribs.koha.org/revision_view.php?rid=15. (Note: I created this script and uploaed it to contribs.koha.org. If the script doesn't map the fields correctly I need to fix it before my mistakes cause problems for others.) Question: How do I do the mapping? ----------------------------------------------------- Now it looks like I need to 1) map some dewey related MARC tag/subfield (which one?) to a items.itemcallnumber 2) make that newly mapped MARC tag/subfield mandatory When I do this, what happens to my previous records which had the default MARC mapping ([tag 952, subfield o]= items.itemcallnumber) ? -- Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html