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 |
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Catholic Church and humanism |
For information about FAST (Faceted Application of Subject Terminology) subject access points, see 6xx Introduction. |
1st Indicator |
Undefined. For information about the 1st indicator position, see Subjects--General Information.
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No information provided |
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No level specified |
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Primary |
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Secondary |
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2nd Indicator |
Thesaurus. For information about the 2nd indicator position, see Subjects--General Information. |
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Library of Congress Subject Headings |
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LC subject headings for children's literature |
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| 2 |
Medical Subject Headings |
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| 3 |
National Agricultural Library subject authority file |
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| 5 |
Canadian Subject Headings |
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| 6 |
Répertoire de vedettes-matière |
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| 7 |
Source is specified in subfield ǂ2 |
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Subfields |
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| ǂa Topical term or geographic name entry element |
For information about subfield ǂa, see Subjects--General Information.
| 650 |
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Adventure stories, American ǂx History and criticism |
| 650 |
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Amish ǂz United States ǂx Social life and customs |
| 650 |
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Anglo-Egyptian War, 1882 ǂx Campaigns |
| 650 |
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Astronauts ǂx Nutrition |
| 650 |
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0 |
Authenticity (Philosophy) in literature |
| 650 |
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Binge watching (Television) |
| 650 |
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Canons, Cathedral, collegiate, etc. ǂz France ǂv Registers |
| 650 |
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Cooking, Estonian ǂx History |
| 650 |
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Damn (The English word) ǂv Early works to 1800 |
| 650 |
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Hastings, Battle of, England, 1066, in art |
| 650 |
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Holstein-Friesian cattle ǂx Breeding |
| 650 |
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JavaScript (Computer program language) |
| 650 |
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Research in reduced gravity environments |
| 650 |
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X (The letter) ǂv Juvenile literature |
| 650 |
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Animals ǂx Habits and behavior |
| 650 |
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2 |
Veterans ǂ0 (DNLM)D014728 |
| 650 |
2 |
2 |
Dental Materials ǂ0 (DNLM)D003764 |
| 650 |
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5 |
Canadian wit and humor (English) ǂ0 (CaOONL)cash10533 |
| 650 |
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7 |
Pesticides ǂx Synthesis ǂ2 fast ǂ0 (OCoLC)fst01059088 |
| 650 |
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Popular music ǂ2 fast ǂ0 (OCoLC)fst01071422 |
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| 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 |
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4 |
Coats of arms ǂy 17th century, ǂe depicted |
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| 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 |
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0 |
Authors, American ǂy 21st century ǂv Biography ǂv Comic books, strips, etc. |
| 650 |
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0 |
Bridges ǂz New York (State) ǂz New York ǂv Maps |
| 650 |
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Concertos (Saxophone with string orchestra) ǂv Solo with piano |
| 650 |
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Fashion design ǂv Pictorial works |
| 650 |
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French language ǂv Textbooks for foreign speakers ǂx English ǂv Juvenile literature |
| 650 |
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0 |
Incunabula ǂz Italy ǂz Bologna ǂv Bibliography ǂv Catalogs |
| 650 |
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Medicine, Korean ǂv Formulae, receipts, prescriptions ǂv Early works to 1800 |
| 650 |
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Murder ǂx Investigation ǂv Fiction |
| 650 |
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Public health ǂz India ǂz Bihar ǂv Statistics ǂv Periodicals |
| 650 |
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Employees ǂx Dismissal ǂv Humor ǂ2 sears |
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| ǂx General subdivision |
For information about subfield ǂx, see Subjects--General Information.
| 650 |
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Automobiles ǂx Motors ǂx Cylinders ǂx Fluid dynamics |
| 650 |
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Cherokee Indians ǂx Wars, 1759-1761 |
| 650 |
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Civil war ǂx Religious aspects |
| 650 |
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COVID-19 (Disease) ǂx Prevention ǂx Government policy ǂz United States |
| 650 |
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Honda motorcycle ǂx Maintenance and repair ǂv Handbooks, manuals, etc. |
| 650 |
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Piano ǂx Instruction and study ǂv Juvenile |
| 650 |
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Plumbing fixtures industry ǂx Employees ǂx Labor unions |
| 650 |
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Roads ǂz California ǂx Interchanges and intersections ǂx Safety measures |
| 650 |
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School administrators ǂx Training of ǂz United States |
| 650 |
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Zombies ǂx Religious aspects ǂx Buddhism |
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| ǂy Chronological subdivision |
For information about subfield ǂy, see Subjects--General Information.
| 650 |
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Architecture ǂz China ǂx History ǂy Three kingdoms-Sui dynasty, 220-618 |
| 650 |
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Calligraphy, Japanese ǂx History ǂy Edo period, 1600-1868 |
| 650 |
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Geology, Stratigraphic ǂy Mississippian |
| 650 |
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Judaism ǂx History ǂy Post-exilic period, 586 B.C.-210 A.D. |
| 650 |
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Painting, French ǂx History ǂy 20th century |
| 650 |
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Paleobiogeography ǂy Cenozoic |
| 650 |
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Presidents ǂz France ǂx Election ǂy 2007 |
| 650 |
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Rock music ǂy 1971-1980 ǂx History and criticism |
| 650 |
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Women ǂx History ǂy Modern period, 1600- |
| 650 |
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Auteurs dramatiques anglais ǂy 1500-1800 ǂv Biographies ǂ2 ram |
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| ǂz Geographic subdivision |
For information about subfield ǂz, see Subjects--General Information.
| 650 |
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Children with mental disabilities ǂx Care ǂz Brazil ǂv Case studies |
| 650 |
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City planning ǂz Argentina ǂz Esperanza (Santa Fe) ǂx History |
| 650 |
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Jews ǂz Jerusalem ǂx Social life and customs |
| 650 |
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Mountaineering ǂz Everest, Mount (China and Nepal) ǂx History |
| 650 |
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Registers of births, etc. ǂz Ohio ǂz Liberty (Adams County : Township) |
| 650 |
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Subways ǂz Pennsylvania ǂz Philadelphia Metropolitan Area ǂv Maps |
| 650 |
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Water-supply ǂz Colorado River Watershed (Colo.-Mexico) ǂx Management |
| 650 |
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World War, 1939-1945 ǂz Russia (Federation) ǂz Saint Petersburg |
| 650 |
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African Americans ǂz New York (N.Y.) ǂx History ǂy 20th century ǂv Juvenile literature ǂ2 sears |
| 650 |
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7 |
Drogas ǂz Nueva York (Estados Unidos) ǂz Nueva York ǂv Teatro ǂ2 bidex |
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| 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 |
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Ocean travel ǂ2 fast ǂ0 (OCoLC)fst01043585 |
| 650 |
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FICTION ǂx Thrillers ǂx Domestic ǂ2 bisacsh |
| 650 |
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Bandes dessinées underground ǂx Histoire et critique ǂ2 ram |
| 650 |
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Literaturkritik ǂ2 gnd ǂ0 (DE-588)4036020-9 |
| 650 |
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Acoustic measurement ǂ2 test |
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| ǂ3 Materials specified |
For information about subfield ǂ3, see Control Subfields. |
| ǂ4 Relationship |
For information about subfield ǂ4, see Control Subfields.
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| 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 manually add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields. |
| ǂ7 Data provenance |
For information about subfield ǂ7, see Data Provenance 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. |
MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 650. |
