Step 3.12: Local Fields in Authority Records
Sometimes catalogers insert fields into their local system’s authority records. Ordinarily during authority control processing, these local fields would be ignored as the authorized version would replace the authorities in the ILS.
MARS 2.0 can retain your local authority fields within matching updated authorities, which are then delivered to you to overlay at your end.
A $5 with a special code (e.g., a cataloger's initials, etc) is a typical stamp within the authority record that offsets field(s) inserted locally by catalogers. When MARS 2.0 finds these $5 fields, it will retain that particular field and insert it into the matched authority record:
original authority from library: 001 n 50006324 100 1 $a Morse, John Torrey, $d 1840-1937 670 $a From his works on Thomas Jefferson, with special notes $5 BLW LC match with $5 local note retained: 001 n 50006324 040 $a DLC $c DLC $d DLC 100 1 $a Morse, John Torrey, $d 1840-1937 400 1 $a Morse, John T. $q (John Torrey), $d 1840-1937 670 $a From his works on Thomas Jefferson, with special notes $5 BLW
After the fields have been inserted into the updated authority records, the records are returned to your institution. Next, you would overlay those authority records into your system, overwriting the copies you have with those furnished by our MARS 2.0 system.
The local notes within your original authority files would be retained in the updates that are delivered by Backstage.
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