Library of Congress >> MARC >> Authority >> 01X-09X >> 042

042 - Authentication Code (NR)

MARC 21 Authority - Full

October 2003

First Indicator
Undefined
# - Undefined

Second Indicator
Undefined
# - Undefined


Subfield Codes $a - Authentication code (R)

FIELD DEFINITION AND SCOPE

One or more authentication codes indicating that the record, existing in a national database, has been reviewed in a specific way. The codes are associated with specifically designated authentication agencies.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

Both indicator positions are undefined; each contains a blank (#).

■ SUBFIELD CODES

$a - Authentication code

If more than one code is applicable, the subfield is repeated. Code from: MARC Authentication Action Code List.

INPUT CONVENTIONS

Capitalization - All codes are recorded in lowercase alphabetic characters.

Library of Congress >> MARC >> Authority >> 01X-09X >> 042

(03/03/2008)