Library Technology Guides

LC soon will be making several changes to the way it distributes field 010 (LC Authority Record Control Number) in the MARC Distribution Service--Name Authorities subscription service. These changes involve the following:

Subfield #a (LC authority record control number) no longer will always be present in the field. In most instances it will be present only if it was input in a Name Authority Cooperative (NACO) record contributed to LC via the Linked Systems Project.

Data in subfields #a and #z (cancelled,' invalid LC authority record control number) will be structured so that they conform with LC practice in the 001 field. Each number will have the prefix left justified with blank fill, the serial number right justified with zero fill, and no hyphen. Each number will end with a trailing blank.

With these changes, LC's handling of field 010 in name authority and subject authority records will be the same.

[Contact: Customer Services Section, Cataloging Distribution Service, Library of Congress, Washington, DC 20541; (202) 287-6171.]