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BSLW (Backstage Library Works) provides metadata and other products and services for the UCLA Library. UCLA Library Digital Initiatives and Information Technology (DIIT) ensures that the extract for BSLW is done on the 15th of the month, covering the period from the 15th of the previous month through the 14th of the current month (e.g., on August 15th, the extract covers July 15th though August 14th). New scripts for loading records may be requested as needed.


Additional Information

BSLW provides outsourced cataloging services. It is the successor to OCLC's MARS processing. The UCLA Library began using BSLW for authority processing in late 2006. Every month UCLA sends 3 files to BSLW, which it uses to update the UCLA master:

  • NEW (authority records added since the previous extract)
  • CHG (authority records modified (excluding the NEW records) since the previous extract)
  • DEL (authority records deleted since the previous extract)

Submit a Request

This service is available to Library Staff

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If this service is not available to you, and you have questions, please send an email to for more information.

Please visit the Technology Service Portal to raise a request.




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