Variable Control Fields
Definition and scope:
The 00X variable control fields contain the record control number and coded information used in the processing of machine-readable authority records (MARC records).
Each data element in the fixed-length 005 and 008 fields is positionally defined. A more detailed explanation of these positionally defined data elements can be found in each field description.
Variable control fields have no indicators or subfield codes.
The code NR or R below indicates whether a field can be repeated in a record.
For information on a specific variable control field, select a topic:
001 Control Number (NR)
003 Control Number Identifier (NR)
005 Date and Time of Latest Transaction (NR)
008 Fixed-Length Data Elements (NR)
See also:
Variable Data Fields (0XX-999)