An established topical term or geographic name used in main subject
headings in established heading records.
Note: In UNBIS, MARC tags 150
(TOPICAL TERM) and 151 (GEOGRAPHIC NAME)
are combined in one field. Names of countries and major
geographical regions are incorporated into the UNBIS Thesaurus and are
treated as topical terms but are coded, by virtue of the first
indicator (9), as geographical terms.
All other geographic names are maintained in the thesaurus database but
are not incorporated into the hierarchical structure of the thesaurus.
Subfield Codes
$a - Topical term
or geographic name entry element (NR).
In UNBIS, the complete topical or geographic term is entered in $a.
Examples:
150
$a GEOTHERMAL
ENERGY
150
$a APPELLATE
COURTS
150
$a
WOMEN IN FORESTRY
150
$a AVERAGE
(MARITIME LAW)
150
9 _ $a GHANA
150
9 _ $a ANTARCTICA
150 9 _ $a SHENYANG (CHINA)
150
9 _ $a BELO
HORIZONTE (BRAZIL)
150
9 _ $a FAEROE
ISLANDS
150
9 _ $a PANAMA
CANAL
150
9 _ $a VICTORIA
FALLS NATIONAL PARK (ZIMBABWE)
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