043 Geographic Area Code

Field definition and scope:

Field 043 contains geographic area codes (GAC) for geographic areas associated with the 1XX heading in an established heading record or a subdivision record. A more precise identification of geographic areas associated with a geographic name heading may be contained in field 052 (Geographic Classification).

The source of the codes in subfield $a is MARC Code List for Geographic Areas that is maintained by the Library of Congress. The source of a local code in subfield $b is indicated in subfield $2. The source of codes in subfield $c is ISO 3166, Codes for the representation of names of countries and their subdivisions - Part 1: Country codes or Part 2: Country subdivision codes.

The National level record requirement for this field is Optional.

Field 043 is repeatable.

Guidelines for applying content designators:

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

Position	Description	NLR	Repeatability
Field 043	Geographic Area Code	O	R
Indicator:
First	Undefined; contains a blank	M
Second	Undefined; contains a blank	M

Subfield code:
$a	Geographic area code	M	R
$b	Local GAC code	O	R
$c	ISO code	O	R
$0	Authority record control number or standard number		R
$1	Real World Object URI		R
$2	Source of local code	O	R
$6	Linkage	A	NR
$8	Field link and sequence number	O	R

Input conventions:

GAC structure

Content designator history:

Field 043 - Geographic Area Code [changed, 2020]: Field 043 was made repeatable.

Subfield $c - ISO code [new, 2001]: Subfield $c was defined to accommodate for ISO 3166-1 country codes.

Subfield $0 - Authority record control number or standard number [new, 2011]

Subfield $1 - Real World Object URI [new, 2017]

LC Guidelines:

043 Geographic Area Code