650 Subject Added Entry- -Topical Term (R) (Variable Data Fields)
First indicator - -Level of subject:
$ No information available
0 No level specified [Not used]
1 Primary [Not used]
2 Secondary [Not used]
Second indicator- -Subject heading system/thesaurus:
The second indicator describes the source of the heading. For instructions, see "Subject Headings- -General Information."
0 Library of Congress Subject Headings
1 LC subject headings for children's literature
2 Medical Subject Headings*
3 National Agricultural Library subject authority file*
4 Source not specified [Not used]
5 Canadian subject headings*
6 Repertoire des vedettes-matiere*
7 Source specified in subfield $2*
For a description of subfields, $x, $y, $z, and $2, see "Subject Headings- -General Information." Example:
a Topical term or geographic name as entry element (NR)
b Topical term following geographic name as entry element [Not used]
c Location of event [Not used]
d Active dates [Not used]
e Relator term [Not used]
x General subdivision (R)
y Chronological subdivision (R)
z Geographical subdivision (R)
2 Source of heading or term* (NR)
3 Materials specified [Not applicable]
6 Linkage (NR)
Description/Instructions:
Field 650 contains all subject headings not belonging to the other categories, including:
1. General terms of the type included in the LC list of subject headings, e.g., "Dogs," "Chemistry," etc.
2. Systematic names of families, genera, and species in botany and zoology, and chemical compounds.
3. Names of events and holidays, e.g., Tannenberg, Battle of, 1914; Phoenix Part Assassination, 1882.
4. A wide variety of names or terms applied to individual objects, or classes of objects. Example:
Exception: When a subject heading consists of a personal name in catalog entry form followed by the phrase "in fiction, drama, poetry, etc." treat the name as a personal name and assign tag 600.
5. Names of deities, fictional and mythological characters, etc. not capable of authorship.
Related fields, etc.
Subject Headings- -General Information , Appendix I
See also:
