Definition |
Index terms that are not derived from a controlled thesaurus or subject heading system. |
1st Indicator |
Level of subject. The level of the subject entry. Use the 1st indicator to distinguish primary and secondary descriptors. |
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No information provided. No information as to the level of the subject term is provided.
| 653 |
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Stamp collecting (United States) |
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| 0 |
No level specified. The level of the subject term could be determined, but is not specified.
| 653 |
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Contract theory |
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Corporate governance |
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| 1 |
Primary. A subject covers the main focus or subject content of the material.
| 653 |
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Ice, Sculpture, moulds, etc. ǂa Children's games |
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| 2 |
Secondary. A subject covers a less important aspect of the content of the material.
| 653 |
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Peg puzzles |
| 653 |
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Wood puzzles |
| 653 |
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Construction sets |
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2nd Indicator |
Type of term or name. Distinguishes uncontrolled index terms by type. |
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No information provided
| 653 |
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Great Britain ǂa Welfare services ǂa Policies compared with ǂa policies in United States, history |
| 653 |
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United States ǂa Welfare services ǂa Policies compared with ǂa policies in Great Britain, history |
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| 3 |
Meeting name
| 653 |
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3 |
Convention on the Civil Aspects of International Child Abduction (The Hague, 25 October 1980) |
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| 6 |
Genre/form term
| 653 |
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6 |
Coming of age stories |
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Subfields |
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| ǂa Uncontrolled term |
An index term from an uncontrolled thesaurus or subject heading system. Repeat subfield ǂa when more than one index term at the level designated in the 1st indicator is assigned. Repeat field 653 for each index term when subfield ǂ0 or ǂ1 is present.
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Man ǂa Eyes ǂa Diseases |
| 653 |
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Bagras Castle ǂ0 (pleiades)786609869 |
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| ǂ0 Authority record control number or standard number |
For information about subfield ǂ0, see Control Subfields.
| 653 |
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AcousTech Mastering ǂ0 (discogs)l265260 |
| 653 |
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Saco Lake ǂ0 (gnis)872606 ǂ0 (geonames)5092045 ǂ1 https://sws.geonames.org/5092045/ |
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| ǂ1 Real World Object URI |
For information about subfield ǂ1, see Control Subfields.
| 653 |
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Russian invasion of Ukraine ǂ1 http://www.wikidata.org/entity/Q110999040 |
| 653 |
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Melbourne General Post Office ǂ1 http://www.wikidata.org/entity/Q6811781 |
| 653 |
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The Scottish Salmon Company ǂ1 http://www.bbc.co.uk/things/1fa5ed44-55c0-4d90-8349-b51d28fadd14#id |
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| ǂ5 Institution to which field applies |
For information about subfield ǂ5, 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 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. |
Indexing |
For indexing and searching information, see Searching WorldCat Indexes, field 653. |
MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 653. |
