Total Database Replacement

A TDR is when a library sends SILO a complete MARC record database of the library’s holdings intended to replace all that library's holdings currently in the SILO Locator.  All the library’s current holdings are deleted and the new file is added to the Locator.  This is one way to clean up the Locator, but a library must meet certain criteria before the TDR process.

A library has to prove they are familiar with the upload process and be able to work through the exception lists. SILO staff will evaluate the records submitted for quality and completeness.  When these criteria have been met, SILO staff will do a TDR for the library. 

Any library wishing to do a TDR should consult with the State Library cataloging consultant first.  Beginning July 1, 2006 a potential TDR library should submit new records at least 3 times before applying. The submitted records must be of a good enough quality to be able to be merged into the existing SILO Locator. The library must work through any exception lists that occur. Once the 3 files are uploaded the library should fill out the form requesting a TDR. The State Library cataloging consultant will then verify that at least 3 files of records were submitted and that upload score is acceptable.

An exception to submitting 3 files can be made if a library has recently cleaned the local database either through a retrospective conversion project or sent the database out to a third party processor. The library should still fill out the form requesting the TDR.

The library will be notified to submit a whole database dump and SILO staff will be notified as well. SILO staff will then run the delete process and add the new records to the Locator.