355 - Security Classification Control (R)
MARC 21 Bibliographic - Full
October 2003
First Indicator
Controlled element
0 - Document
1 - Title
2 - Abstract
3 - Contents note
4 - Author
5 - Record
8 - None of the above
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Second Indicator
Undefined
# - Undefined
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Subfield Codes
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$a - Security classification (NR)
$b - Handling instructions (R)
$c - External dissemination information (R)
$d - Downgrading or declassification event (NR)
$e - Classification system (NR)
$f - Country of origin code (NR)
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$g - Downgrading date (NR)
$h - Declassification date (NR)
$j - Authorization (R)
$6 - Linkage (NR)
$8 - Field link and sequence number (R)
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FIELD DEFINITION AND SCOPE
Specifics pertaining to the security classification associated with the document, title,
abstract, contents note, and/or the author. In addition, it can contain handling
instructions and external dissemination information pertaining to the dissemination of
the document, title, abstract, contents note, and author. The field may also contain
downgrading or declassification data, the name of the classification system, and a
country of origin code.
Used with both classified and unclassified material. It is used when the security
information is too specific to be handled by field 506 (Restrictions on Access Note).
Repeatable when multiple classification and/or dissemination specifics are applicable to
the record in hand.
GUIDELINES FOR APPLYING CONTENT DESIGNATORS
■ INDICATORS
First Indicator - Controlled element What element is controlled by the security classification in subfield
$a, i.e., whether it is the document as a whole or the title, abstract,
contents note, or author.
0 - Document Security classification pertains to the document as a whole.
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| 355 |
0#$aUnclassified$bFOUO
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1 - Title Security classification pertains to the title in fields 21X-24X, 740 Added
Entry-Uncontrolled Related Analytical Title.
2 - Abstract Security classification pertains to field 520 (Summary, Etc. Note).
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| 355 |
2#$aConfidential$bNOFORN
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3 - Contents note Security classification pertains to field 505 (Formatted Contents Note).
4 - Author Security classification pertains to 245$c and to the 100-111 main
entry and 700-711 fields.
5 - Record Security classification pertains to the entire record.
8 - None of the above Security classification pertains to other than the document, title, abstract,
contents note, or author.
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| 355 |
8#$aSecret
[A subject heading contains a term that is classified as secret.] |
Second Indicator - Undefined Undefined and contains a blank (#).
■ SUBFIELD CODES
$a - Security classification Security classification (e.g., Unclassified, Secret,
Confidential) associated with the document, title, abstract, contents
note, or author.
$b - Handling instructions Handling instructions, e.g., who internally in the organization may handle or see
the document, title, abstract, contents note, or author.
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1#$aSecret$bNOFORN$bNOCONTRACT
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$c - External dissemination information External dissemination information, e.g., which foreign countries may see the
document, title, abstract, contents note, or author.
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| 355 |
0#$aSecret$bFRD$cAS$d010101
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$d - Downgrading or declassification event Data about the security classification, often a phrase pertaining to downgrading
or declassification, e.g., OADR (which stands for "Original Agency
Determination Required"). Dates relating to the downgrading or declassification
are recorded in subfields $g or $h.
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| 355 |
0#$aSecret$bNOFORN$bWNINTEL$bNOCONTRACT$dOADR
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$e - Classification system Name of a security classification system, not necessarily come from a controlled
list.
$f - Country of origin code Two- or three-character alphabetic MARC code indicating the country of origin of
the classification. Code from:
MARC Code List for Countries.
For the U.S. intelligence community, this subfield is not used if the country of
origin of the classification is the United States.
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| 355 |
0#$aTop Secret$cUS$cCA$fxxk
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$g - Downgrading date Date pertaining to the downgrading of the document, title, abstract, contents
note, or author. Downgrading involves changes to security classification, from a
higher level to lower level of classification.
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| 355 |
0#$aConfidential$bNOCONTRACT$cUK$g20281001
[The review for downgrading of the classification is in October
2028.] |
$h - Declassification date Date pertaining to the declassification of the document, title, abstract, contents
note, or author. Declassification involves the removal of any security
classification on an item.
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| 355 |
0#$aSecret$bNOFORN$h20230301
[Security classification for a document that is eligible for
declassification in March 2023.] |
$j - Authorization Information that identifies by whose authority a change in security classification
was made. The subfield contains a MARC code of the authorizing agency. See
Appendix I:
Organization Code
Sources for a listing of sources used in MARC 21 records.
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| 355 |
0#$aSecret$bNOFORN$h20230301$j<agency identifier>
[Security classification for a document that is eligible for
declassification in March 2023.] |
$8 - Field link and sequence number
INPUT CONVENTIONS
Punctuation - Field 355 does not end with a period unless the last word in the field is an
abbreviation, initial/letter, or data that ends with a mark of punctuation.