LC Guidelines: 008/10 Descriptive cataloging rules
NACO:
For newly created name/series authority records code z is the only value used.
When existing NARs using codes a, b, c, or d are modified in any way, they are re-coded to RDA and the 008/10 code is changed accordingly. Exceptions to this guideline are found in the Descriptive Cataloging Manual Z1 008/10 section.
Do not use codes: a, b, d, n, fill character ( | )
SACO:
Always use code n.
LC:
NAMES/SERIES:
For newly created name/series authority records code z is the only value used.
When existing NARs using codes a, b, c, or d are modified in any way, they are re-coded to RDA and the 008/10 code is changed accordingly. Exceptions to this guideline are found in the Descriptive Cataloging Manual Z1 008/10 section.
Do not use codes: a, b, d, fill character ( | )
LC uses code n (Not applicable) in traced reference records (008/09, code c).
SUBJECTS:
Always use code n.
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