Library of Congress >> MARC >> Classification >> 01X-084 >> 042

042 - Authentication Code (NR)


MARC 21 Classification - Full
January 2000

First Indicator
Undefined
# - Undefined

Second Indicator
Undefined
# - Undefined


Subfield Codes
$a - Authentication code (R)

FIELD DEFINITION AND SCOPE

One or more authentication codes assigned by centers that review and upgrade, if necessary, an authority record in a national database. Codes have not been defined.

When defined, the authentication codes will be compatible with those used in other cooperative projects.


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