Information:
The 000 tag or leader of the MARC Authority format
contains coded information that defines the parameters
for the processing of the record. The 000 tag contains
twenty-four character positions numbered from 00 to
23. The 000 tag is required in all records.
The cataloging software supplies much of the leader.
Positions 05 and 17 may be supplied by the cataloger.
The most commonly used codes for these positions are
explained below.
Cataloging software usually provides a window with
default codes to assist the cataloger in providing
this information.
For example:
Default Record Status n
Default Record Type z
Default Encoding Level n
Position 05 Record status
A single-letter code that indicates the status of the
record or if a change has been made in the record.
c Corrected or revised
n New (Used when entering a new record)
Position 06 Type of record
A single-letter code that defines the components of
the record.
z Authority data
Position 17 Encoding level
A single-letter code that indicates whether the record
is complete or incomplete.
n Complete authority record
o Incomplete authority record
Examples:
nzn (A new authority record)
czn (A complete authority record that has
been revised)
nzo (A new authority record that is
incomplete)
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