MARC 21 Concise Format for Bibliographic Data: 355: Security Classification Control (Network Development and MARC Standards Office, Library of Congress)

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.

First - Controlled element

0 - Document

1 - Title

2 - Abstract

3 - Contents note

4 - Author

5 - Record

8 - None of the above

$a - Security classification (NR)

Security classification (e.g., Unclassified, Secret, Confidential) associated with the document, title, abstract, contents note, or author.

$b - Handling instructions (R)

Handling instructions, e.g., who internally in the organization may handle or see the document, title, abstract, contents note, or author.

$c - External dissemination information (R)

$d - Downgrading or declassification event (NR)

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.

$e - Classification system (NR)

Name of a security classification system, not necessarily come from a controlled list.

$f - Country of origin code (NR)

Two- or three-character alphabetic MARC code indicating the country of origin of the classification. Code from: MARC Code List for Countries.

$g - Downgrading date (NR)

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.

$h - Declassification date (NR)

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.

$j - Authorization (R)

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.

$6 - Linkage (NR)

See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number (R)

See description of this subfield in Appendix A: Control Subfields.


355	0#$aUnclassified$bFOUO


355	2#$aConfidential$bNOFORN


355	3#$aSecret


355	1#$aSecret$bNOFORN$bNOCONTRACT

355 - Security Classification Control (R)