Later this month, OCLC will install changes to WorldCat validation, including the following new features and enhancements:

*         OCLC-MARC Validations of New MARC Codes Announced May 31, June 28, July 19, August 9, September 13, and October 4 and 11, 2019.
*         OCLC-MARC Bibliographic Update 2019, Part Two.
*         OCLC-MARC Authority Update 2019, Part Two, to the validation rule set that includes all valid elements of MARC 21 Authority Format.
*         OCLC-MARC Holdings Update 2019, Part Two.
*         More Bibliographic Fields that May Be Added to or Edited in Non-CONSER PCC Records.

Bug fixes include:

*         Correction of Relationship Rules Between Bibliographic Field 022 First Indicator and the Presence of Field 042.
*         Correction of Relationship of Authority Field 034 Subfield $2 to the Cartographic Data Source Codes List.
*         Correction of Bibliographic Field 040 Subfield $b to Not Repeatable.
*         Correction of Validation for MARC Authentication Action Code "lacderived".
*         Correction of Validation Error when ISSN is Bracketed in Bibliographic Field 490 Subfield $x.

These enhancements are the result of announcements of new MARC elements and codes by the Library of Congress as well as feedback and requests from members of the OCLC cooperative.

See the WorldCat Validation Release Notes for November 2019 at oc.lc/validation-release-notes<https://help.oclc.org/Metadata_Services/WorldShare_Record_Manager/WorldCat_validation_release_notes_and_known_issues> for more details.

Please note that in the past, we have announced and documented OCLC-MARC Bibliographic, Authority, and Holdings Updates in OCLC Technical Bulletins<https://help.oclc.org/WorldCat/Cataloging_documentation/Technical_Bulletins> (TBs), usually once or twice a year.  Since September 2018, we have also been issuing these WorldCat Validation Release Notes<https://help.oclc.org/Metadata_Services/WorldShare_Record_Manager/WorldCat_Validation_release_notes_and_known_issues> on a roughly quarterly basis that corresponds to what has now become our regular schedule for validation system installations.

Beginning with this set of Validation Release Notes, we plan to discontinue using Technical Bulletins to announce and document WorldCat Validation changes.  Although the Release Notes include fewer details about new or revised MARC elements and omit the lists of fields and subfields in which new MARC Codes may be used, all of those details can be found in the authoritative MARC 21 Update documents and MARC Code lists, links to which are included in the Release Notes.  We will regularly include in the Release Notes, however, such enhancements as the list of many additional Bibliographic fields that you may add to and/or edit in non-CONSER PCC records (otherwise known as "Database Enrichment" fields) and all of the validation corrections ("Bug Fixes") we've implemented.  Those sorts of changes and improvements were rarely announced in the past.

We hope that this transition to more timely, concise, and focused Validation Release Notes serves your needs and meets with your approval.  Thank you.

Please forgive any duplication of this message.

jay

Jay Weitz
OCLC * Senior Consulting Database Specialist, WorldCat Metadata Quality, Global Product Management
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