Contents   Fixed field   Access points   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx   Control subfields

650  Subject Added Entry--Topical Term (R)

Record Type

BIB, LBD

Input Standards

Field (Full/Minimal)
Required if applicable/Optional
1st Indicator  Level of subject
blank character No information provided
0 No level specified
1 Primary
2 Secondary
2nd Indicator  Thesaurus
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
5 Canadian Subject Headings
6 Répertoire de vedettes-matière
7 Source specified in subfield ǂ2
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards (Full/Minimal)
ǂa Topical term or geographic name entry element (NR) Mandatory/Mandatory
ǂb Topical term following geographic name entry element (NR) Required if applicable/Required if applicable
ǂc Location of event (NR) Required if applicable/Required if applicable
ǂd Active dates (NR) Required if applicable/Required if applicable
ǂe Relator term (R) Optional/Optional
ǂg Miscellaneous information (R) Required if applicable/Required if applicable
ǂv Form subdivision (R) Required if applicable/Required if applicable
ǂx General subdivision (R) Required if applicable/Required if applicable
ǂy Chronological subdivision (R) Required if applicable/Required if applicable
ǂz Geographic subdivision (R) Required if applicable/Required if applicable
ǂ0 Authority record control number or standard number (R) Optional/Optional
ǂ1 Real World Object URI (R) Optional/Optional
ǂ2 Source of heading or term (NR) Required if applicable/Required if applicable
ǂ3 Materials specified (NR) Optional/Optional
ǂ4 Relationship (R) Optional/Optional
ǂ6 Linkage (NR) System supplied/System supplied
ǂ8 Field link and sequence number (R) Optional/Optional

Definition

 

A topical subject used as a subject access point. Subject access points are assigned to a bibliographic record to provide access according to established subject cataloging principles and guidelines. Any institution assigning subject headings based on the lists and authority files identified in the 2nd indicator position or in subfield ǂ2 may use field 650. A topical subject access point consists of a general subject term and may include the name of an event. Use for the following types of topical subject access points:

  • General terms of the type listed in Library of Congress Subject Headings and other thesauri (e.g., Chemistry, Vehicles, etc.)
  • Names or terms applied to individual objects or classes of objects (e.g., Big Ben (Tower clock), Telephones, etc.)
  • Systematic names of chemical compounds (e.g., Dihydrogen monoxide, Nitrogen trihydride, etc.)
  • Systematic names of families, genera, species in botany and zoology (e.g., Hemiptera, Carcharhinidae, etc.)

When in doubt on how an entity should be coded, see Alphabetical List of Ambiguous Headings.

Use field 650 also for a geographic name, the name of a corporate body, or a title included in a phrase subject heading.

650   0 Iran in the Qurʼan
650   0 Catholic Church and humanism
650   0 Bible and atheism

1st Indicator

 

Undefined. For information about the 1st indicator position, see Subjects--General Information.

blank character

Undefined

2nd Indicator

 

Thesaurus. For information about the 2nd indicator position, see Subjects--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

   
5

Canadian Subject Headings

   
6

Répertoire de vedettes-matière

   
7

Source is specified in subfield ǂ2

Subfields

   
ǂa Topical term or geographic name entry element  

For information about subfield ǂa, see Subjects--General Information.

650   0 Adventure stories, American ǂx History and criticism
650   0 Amish ǂz United States ǂx Social life and customs
650   0 Anglo-Egyptian War, 1882 ǂx Campaigns
650   0 Astronauts ǂx Nutrition
650   0 Authenticity (Philosophy) in literature
650   0 Binge watching (Television)
650   0 Canons, Cathedral, collegiate, etc. ǂz France ǂv Registers
650   0 Cooking, Estonian ǂx History
650   0 Damn (The English word) ǂv Early works to 1800
650   0 Hastings, Battle of, England, 1066, in art
650   0 Holstein-Friesian cattle ǂx Breeding
650   0 JavaScript (Computer program language)
650   0 Research in reduced gravity environments
650   0 X (The letter) ǂv Juvenile literature
650   1 Animals ǂx Habits and behavior
650   2 Veterans ǂ0 (DNLM)D014728
650 2 2 Dental Materials ǂ0 (DNLM)D003764
650   5 Canadian wit and humor (English) ǂ0 (CaOONL)cash10533
650   7 Pesticides ǂx Synthesis ǂ2 fast ǂ0 (OCoLC)fst01059088
650   7 Popular music ǂ2 fast ǂ0 (OCoLC)fst01071422
ǂb Topical term following geographic name entry element  

For information about subfield ǂb, see Subjects--General Information.

ǂc Location of event  

For information about subfield ǂc, see Subjects--General Information.

ǂd Active dates  

For information about subfield ǂd, see Subjects--General Information.

ǂe Relator term  

For information about subfield ǂe, see Subjects--General Information.

650   7 Coats of arms ǂy 17th century, ǂe depicted ǂ2 lctgm
ǂg Miscellaneous information  

For information about subfield ǂg, see Subjects--General Information.

ǂv Form subdivision  

For information about subfield ǂv, see Subjects--General Information.

650   0 Authors, American ǂy 21st century ǂv Biography ǂv Comic books, strips, etc.
650   0 Bridges ǂz New York (State) ǂz New York ǂv Maps
650   0 Concertos (Saxophone with string orchestra) ǂv Solo with piano
650   0 Fashion design ǂv Pictorial works
650   0 French language ǂv Textbooks for foreign speakers ǂx English ǂv Juvenile literature
650   0 Incunabula ǂz Italy ǂz Bologna ǂv Bibliography ǂv Catalogs
650   0 Medicine, Korean ǂv Formulae, receipts, prescriptions ǂv Early works to 1800
650   0 Murder ǂx Investigation ǂv Fiction
650   0 Public health ǂz India ǂz Bihar ǂv Statistics ǂv Periodicals
650   7 Employees ǂx Dismissal ǂv Humor ǂ2 sears
ǂx General subdivision  

For information about subfield ǂx, see Subjects--General Information.

650   0 Automobiles ǂx Motors ǂx Cylinders ǂx Fluid dynamics
650   0 Cherokee Indians ǂx Wars, 1759-1761
650   0 Civil war ǂx Religious aspects
650   0 COVID-19 (Disease) ǂx Prevention ǂx Government policy ǂz United States
650   0 Honda motorcycle ǂx Maintenance and repair ǂv Handbooks, manuals, etc.
650   0 Piano ǂx Instruction and study ǂv Juvenile
650   0 Plumbing fixtures industry ǂx Employees ǂx Labor unions
650   0 Roads ǂz California ǂx Interchanges and intersections ǂx Safety measures
650   0 School administrators ǂx Training of ǂz United States
650   0 Zombies ǂx Religious aspects ǂx Buddhism
ǂy Chronological subdivision  

For information about subfield ǂy, see Subjects--General Information.

650   0 Architecture ǂz China ǂx History ǂy Three kingdoms-Sui dynasty, 220-618
650   0 Calligraphy, Japanese ǂx History ǂy Edo period, 1600-1868
650   0 Geology, Stratigraphic ǂy Mississippian
650   0 Judaism ǂx History ǂy Post-exilic period, 586 B.C.-210 A.D.
650   0 Painting, French ǂx History ǂy 20th century
650   0 Paleobiogeography ǂy Cenozoic
650   0 Presidents ǂz France ǂx Election ǂy 2007
650   0 Rock music ǂy 1971-1980 ǂx History and criticism
650   0 Women ǂx History ǂy Modern period, 1600-
650   7 Auteurs dramatiques anglais ǂy 1500-1800 ǂv Biographies ǂ2 ram
ǂz Geographic subdivision  

For information about subfield ǂz, see Subjects--General Information.

650   0 Children with mental disabilities ǂx Care ǂz Brazil ǂv Case studies
650   0 City planning ǂz Argentina ǂz Esperanza (Santa Fe) ǂx History
650   0 Jews ǂz Jerusalem ǂx Social life and customs
650   0 Mountaineering ǂz Everest, Mount (China and Nepal) ǂx History
650   0 Registers of births, etc. ǂz Ohio ǂz Liberty (Adams County : Township)
650   0 Subways ǂz Pennsylvania ǂz Philadelphia Metropolitan Area ǂv Maps
650   0 Water-supply ǂz Colorado River Watershed (Colo.-Mexico) ǂx Management
650   0 World War, 1939-1945 ǂz Russia (Federation) ǂz Saint Petersburg
650   7 African Americans ǂz New York (N.Y.) ǂx History ǂy 20th century ǂv Juvenile literature ǂ2 sears
650   7 Drogas ǂz Nueva York (Estados Unidos) ǂz Nueva York ǂv Teatro ǂ2 bidex
ǂ0 Authority record control number or standard number  

For information about subfield ǂ0, see Control Subfields.

ǂ1 Real World Object URI  

For information about subfield ǂ1, see Control Subfields.

ǂ2 Source of heading or term  

For information about subfield ǂ2, see Subjects--General Information.

650   7 Ocean travel ǂ2 fast ǂ0 (OCoLC)fst01043585
650   7 FICTION ǂx Thrillers ǂx Domestic ǂ2 bisacsh
650   7 Bandes dessinées underground ǂx Histoire et critique ǂ2 ram
650   7 Literaturkritik ǂ2 gnd ǂ0 (DE-588)4036020-9
650   7 Acoustic measurement ǂ2 test
ǂ3 Materials specified  

For information about subfield ǂ3, see Control Subfields.

ǂ4 Relationship  

For information about subfield ǂ4, see Control Subfields.

ǂ6 Linkage  

Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields.

ǂ8 Field link and sequence number  

For information about subfield ǂ8, see Control Subfields.

Punctuation

 

For information about punctuation, see Subjects--General Information.

For more information on punctuation, including OCLC policy, see section 2.8, Punctuation.

Indexing

 

For indexing and searching information, see Searching WorldCat Indexes, field 650.

This page last revised: June 9, 2020