Checking for Duplicate Records

Polaris duplicate detection helps you avoid adding duplicate bibliographic or authority records to your database. Duplicate detection is automatically run when you save a bibliographic or authority record. You can also select Tools > Replace/Check for duplicates from the Bibliographic Record workform, or Tools > Check for Duplicates on the Authority Record workform. The following Polaris Administration settings control duplicate detection and how records are overlaid in Polaris Cataloging:

Bibliographic and authority deduplication database tables
The criteria for detecting duplicates are set in the Bibliographic Deduplication and the Authority Deduplication database tables at the system, library or branch levels in Polaris Administration. See Change bibliographic or authority deduplication tables.
Bibliographic Tags to Retain/Delete policy table
When a record is overlaid, the 035 tag of the replaced record is saved in the new record as well as any tags specified for retention in the Bibliographic Tags to Retain/Delete policy table. See Specify tags to retain from overlaid bibs.
Authority Overlay Retention policy table
When an authority record is overlaid, the 035 tag of the replaced record is saved in the new record as well as any tags specified for retention in the Authority Overlay Retention policy table. See Specify tags to retain from overlaid authority records.
MARC validation immediately after bib overlay cataloging profile Some of the tags retained from the overlaid records may be non-repeatable tags. You may want to set MARC validation immediately after bib overlay to Yes so that MARC validation is performed on the new record after the duplicates are overlaid. See Enable validation when duplicate bibs are replaced.
Check headings immediately after bib overlay cataloging profile - If this profile is set to Yes in Polaris Administration, the headings are checked in the retained record after it overlays another bibliographic record or records. See Enable headings check when replacing bibs.
Bibliographic record replace: maximum allowed in one operation Cataloging parameter - This system-level parameter limits the number of records that can be replaced at once. See Set the number of bibs that can be replaced at once.

Note:
For information on the duplicate detection process during import, see Set import options for bibliographic records.