The codes should not be used in exchange records until after October 13, 2007. This 60-day waiting period is required to provide MARC 21 implementers time to include newly defined codes in any validation tables they may apply to the MARC fields where the codes are used.
The following code is for use in subfield $2 in field 017 in Bibliographic records (Copyright or Legal Deposit Number).
- R.O.C. Government Publications Catalogue
(Tapei: Research, Development and Evaluation Commission, Executuve
Yuan) [use only after October 13, 2007]
- British Library derived cataloging Code ukblderived signifies that the British Library has re-used another organization's catalog record for its cataloging. Headings have not been validated against the relevant authority file. [use only after October 13, 2007]
The following code is for use in subfield $2 in fields 600-657 in Bibliographic and Community Information records, and in subfield $f in field 040 (Cataloging Source) in Authority records.
- MuzeVideo UK DVD and UMD film genre classification
(London: Muze Europe Ltd) [use only after October 13, 2007]
- Tesauro Agrcola (Beltsville, Maryland; National Agricultural Library) [use only after October 13, 2007]