DCM Z1: 024 Other Standard Identifier
General:
Follow the guidelines in NACO Best Practices for the 024 Field posted at: https://www.loc.gov/aba/pcc/naco/documents/NACO-024-Best-Practices.pdf. As a general rule, limit the number of 024 fields in a NACO authority record to five. Do not routinely delete or change existing 024 fields when adding new ones.
Maintenance:
LC/PCC catalogers are not required to maintain identifiers coded in the 024 field of NACO authority records. When an 024 field is present in an authority record that is being reported for deletion (for example, in the case of a duplicate), LC/PCC catalogers should transfer the field to the record that is to be retained. When two authority records are being collapsed into one, and each record has a different 024 field, LC/PCC catalogers should include both 024 fields in the updated record.
For more information on DCM Z1 Instructions, select: