Fixed Fields (Section I: New Authority Records)
Most fixed fields in authority records are either constants or are system supplied. The only fixed fields catalogers will routinely need to determine are:
Descriptive cataloging code (008/10)
code a for earlier rules (not used for newly created NARs)
code b for AACR1 (not used for newly created NARs)
code c for AACR2
code d for AACR2-compatible headings (used only for a newly established NAR for a uniform title entered under a personal or corporate name that is already coded d, or for a subordinate unit entered under a corporate name already coded d)
Undifferentiated personal name (008/32)
code a for a differentiated (i.e.,representing one person) personal name or a name-title entered under a personal name
code b for an undifferentiated (non-unique) personal name (i.e., a name heading that represents more than one person with the same name, according to AACR2 22.20)
code n otherwise (i.e., for a corporate, conference or geographic name)
Reference evaluation (008/29)
code a if the record includes cross references (4XX or 5XX)
code b for unevaluated references that must be revised if record is being updated; do not use in newly-created records
code n if there are no cross references
Level of establishment (008/33)
code a for full-level
code c for provisional level
code d for preliminary level
See also: