Variable Control Fields

Definition and scope:

The 00X variable control fields contain control numbers and other kinds of control and coded information that are used in the processing of machine-readable bibliographic records (MARC records). Each control field is identified by a field tag in the Directory and contains either a single data element or a series of fixed-length data elements identified by relative character position. A more detailed explanation of positionally defined data elements can be found in the sections describing specific fields.

Variable control fields contain neither indicator positions nor subfield codes .

Field 009 is currently reserved for local use and is not described in this document.

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)

006 Fixed-Length Data Elements - Additional Material Characteristics (R)

007 Physical Description Fixed Field (R)

008 Fixed-Length Data Elements (NR)

Content designator history:

009 Physical Description Fixed-Field for Archival Collection [obsolete] Currently reserved for local use.

See also:

Variable Data Fields (0XX-999)

UMARC Format for Bibliographic Data: Contents