653 Index Term--Uncontrolled (R)
Record Type |
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BIB |
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Input Standards |
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| Field (Full/Minimal) | ||
| Optional/Optional | ||
| 1st Indicator Level of subject | ||
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No information provided | |
| 0 | No level specified | |
| 1 | Primary | |
| 2 | Secondary | |
| 2nd Indicator Type of term or name | ||
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No information provided | |
| 0 | Topical term | |
| 1 | Personal name | |
| 2 | Corporate name | |
| 3 | Meeting name | |
| 4 | Chronological term | |
| 5 | Geographical term | |
| 6 | Genre/form term | |
| Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards (Full/Minimal) | |
| ǂa | Uncontrolled term (R) | Mandatory/Mandatory |
| ǂ0 | Authority record control number or standard number (R) | Optional/Optional |
| ǂ1 | Real World Object URI (R) | Optional/Optional |
| ǂ5 | Institution to which field applies (NR) | Required if applicable/Required if applicable |
| ǂ6 | Linkage (NR) | System supplied/System supplied |
| ǂ7 | Data provenance (R) | Optional/Optional |
| ǂ8 | Field link and sequence number (R) | Optional/Optional |
Definition |
Index terms that are not derived from a controlled thesaurus or subject heading system. |
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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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2nd Indicator |
Type of term or name. Distinguishes uncontrolled index terms by type. |
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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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| ǂ0 Authority record control number or standard number | For information about subfield ǂ0, see Control Subfields.
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| ǂ1 Real World Object URI | For information about subfield ǂ1, see Control Subfields.
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| ǂ5 Institution to which field applies | For information about subfield ǂ5, 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. |
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| ǂ7 Data provenance | For information about subfield ǂ7, see Data Provenance Subfields. |
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| ǂ8 Field link and sequence number | For information about subfield ǂ8, see Control Subfields. |
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Indexing |
For indexing and searching information, see Searching WorldCat Indexes, field 653. |
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MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 653. |