751 Index Term - Geographic Name (R) (Variable Data Field)
Field definition and scope: This field contains a geographic name used as an index term that supplements terms derived in the USMARC record. The geographic name may be referred to in the classification number and caption in field 153 (Classification Number). The field may be used to link a classification number with a related controlled geographic name heading. The values in the second indicator position or the data in subfield $2 (Source of heading or term) identify the subject heading system or thesaurus used by an institution to formulate the geographic name index term. Terms not controlled by a thesaurus or authority file are contained in field 753 (Index Term - Uncontrolled).
Field 751 is repeatable.
Guidelines for applying Content Designators: [Guidelines for applying subfields $i and $w are provided below. Guidelines for applying the remaining content designators and input conventions are provided in the USMARC Format for Bibliographic Data: field 651 (Subject Added Entry - Geographic Name).]
Indicators
First Undefined; contains a blank (#)
Second Subject heading system/thesaurus
0 Library of Congress Subject Headings/LC authority files
1 LC subject headings for children's literature
2 Medical Subject Headings/NLM authority files
3 National Agricultural Library subject authority file
4 Source not specified
5 Canadian Subject Headings/NLC authority file
6 Répertoire des vedettes-matière/NLC authority file
7 Source specified in subfield $2
Subfield Codes
Name portion:
$a Geographic name (NR)
Subject subdivision portion:
$x General subdivision (R)
$y Chronological subdivision (R)
$z Geographic subdivision (R)
Control subfields:
$i Explanatory text (R)
$w Authority record control number (R)
$2 Source of heading or term (NR)
$3 Materials specified (NR)
Related USMARC fields or documents:
USMARC Format for Bibliographic Data:
USMARC Code List for Organizations
See also:
