X51 Geographic Names - General Information (Variable Data Field)
Each geographic name field is unique in its definition and scope. For specific information, select from the list below.
151 Heading - Geographic Name (NR)
451 See From Tracing - Geographic Name (R)
551 See Also From Tracing - Geographic Name (R)
751 Established Heading Linking Entry - Geographic Name (R)
Record requirements: The National level record requirement
for the geographic name fields is Mandatory if applicable, except for field 751 which is Optional. For the national level requirements by subfield, see the specific field.
Field repeatability: See the specific field for its repeatability
.
Guidelines for applying content designators:
The content designators identify the subelements occurring in geographic name headings constructed according to generally accepted cataloging and thesaurus-building conventions [e.g., Anglo-American Cataloguing Rules (AACR 2), Library of Congress Subject Headings (LCSH)].
Jurisdiction names (including those that are ecclesiastical entities) alone or followed by subject subdivisions are X51 geographic names.
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 the X10 fields
.
Geographic names used in phrase subject headings (e.g., Iran in the Koran) are contained in the X50 fields
.
A geographic name that is authorized for use only as a subject subdivision part of an extended subject heading
is contained in a 181 (Geographic Subdivision)
field.
The indicators, subfield codes, and input conventions for the geographic name fields 151, 451, 551, and 751 follow similar patterns. Guidelines for applying them are below. Subfields are grouped by type of entry.
For indicator and subfield code definitions and examples, National level (NLR) record requirements , and designator repeatability , see table below. An asterisk ( * ) in the column indicates that the requirement varies. See table in the specific field.:
Position | Description | NLR | Repeatability |
Field X51 | Geographic Names | * | * |
Indicator: | |||
First | Undefined; contains a blank | M | |
Second | |||
151, 451, 551 | Undefined; contains a blank | M | |
751 | M | ||
0 | A | ||
1 | A | ||
2 | A | ||
3 | A | ||
4 | A | ||
5 | A | ||
6 | A | ||
7 | A | ||
Subfield code: | |||
Name portion | |||
$a | M | NR | |
Subject subdivision portion | |||
$v | A | R | |
$x | A | R | |
$y | A | R | |
$z | A | R | |
Tracing and linking subfields | |||
$i | Reference instruction phrase [451, 551] | A | NR |
$w | Control subfield [451, 551, 751] | A | NR |
$0 | Record control number [551, 751] | A | R |
$2 | A | NR | |
$5 | Institution to which field applies [451, 551, 751] | A | R |
$6 | A | NR | |
$8 | O | R |
Ambiguous headings
(what is considered a "geographic" name)
Display constant for X51 fields
Second Indicator - Nonfiling characters [151, 451, 551] [obsolete]: The second indicator position was made obsolete in fields 151, 451, and 551 in 1993. The values were: 0-9 (Number of nonfiling characters present).
Subfield $b - Name following place as entry element [151, 451, 551] [obsolete]: Subfield $b was made obsolete in fields 151, 451, and 551 in 1987. A city section name entered under the name of a jurisdiction is contained in an X10 field
. Records created before this change may contain an X51 field with a subfield $b for this type of name.
Subfields $v - Record control number [751] [obsolete] [USMARC only]
$0 - Record control number [551, 751] [new]
$3 - Authority record control number [obsolete, 1997] [CAN/MARC only]
In USMARC, from 1993 to 1995, subfield $v was defined as Record control number in the 7XX Heading Linking Entry fields. When subfield $v was adapted for form subdivisions in MARC bibliographic and authority heading fields in 1995, subfield $v was redefined as Form subdivision. In 1997, subfield $0 was added as Record control number in 5XX and 7XX fields.
Related MARC fields or documents:
7XX Heading Linking Entries - General Information
880 Alternate Graphic Representation
Tracing and Reference Fields - General Information
MARC Code List for Organizations
Symbols and Interlibrary Loan Policies in Canada
See also:
