651 Subject Added Entry - Geographic Name

651 Subject Added Entry - Geographic Name (R) (Variable Data Field)

Field definition and scope:

Field 651 contains a geographic name used as a subject added entry. Subject added entries are assigned to a bibliographic record to provide access according to generally accepted cataloging and thesaurus-building rules [e.g., Library of Congress Subject Headings (LCSH), Medical Subject Headings (MeSH)]. Field 651 may be used by any institution assigning subject headings based on the lists and authority files identified in the second indicator position or in subfield $2 (Source of heading or term) .

Jurisdiction names alone or followed by subject subdivisions are contained in 651 fields. A name of a jurisdiction that represents an ecclesiastical entity is contained in a 610 field . A corporate name, a form subheading, a title of a work, and/or a city section name entered under the name of a jurisdiction are contained in 610 fields. Geographic names used in phrase subject headings (e.g., Iran in the Koran) are contained in 650 fields .

The National level record requirement for this field is Mandatory if applicable.

Field 651 is repeatable .

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, National-level (NLR) and Minimal-level (MLR) record requirements , and designator repeatability , see table below:Input conventions:

Position	Description	NLR	MLR	Repeatability
Field 651	Subject Added Entry - Geographic Name	A	O	R
Indicator:
First	Undefined; contains a blank	M

Second	Subject heading system/thesaurus	M
0	Library of Congress Subject Headings	A
1	LC subject headings for children's literature	A
2	Medical Subject Headings	A
3	National Agricultural Library subject authority file	A
4	Source not specified	A
5	Canadian Subject Headings	A
6	Répertoire de vedettes-matière	A
7	Source specified in subfield $2	A

Subfield code:
	Name portion
$a	Geographic name	M	O	NR

	Subject subdivision portion
$v	Form subdivision	A	O	R
$x	General subdivision	A	O	R
$y	Chronological subdivision	A	O	R
$z	Geographic subdivision	A	O	R

	Control subfields
$2	Source of heading or term	A	O	NR
$3	Materials specified	O	O	NR
$6	Linkage	A	O	NR
$8	Field link and sequence number	O	O	R

Input conventions:

Ambiguous headings (what is considered a "geographic" name)

Content designator history:

Subfield $b - Geographic name following place entry element [obsolete]: Subfield $b was made obsolete in 1981. Subject headings currently formulated in this pattern are contained in field 610 .

Related MARC fields or documents:

880 Alternate Graphic Representation

MARC Code List for Relators, Sources, Description Conventions

See also:

6XX Subject Access Fields

Variable Data Fields