657 Index Term--Function (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 Undefined | ||
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Undefined | |
| 2nd Indicator Source of term | ||
| 7 | Source is specified in subfield ǂ2 | |
| Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards (Full/Minimal) | |
| ǂa | Function (NR) | Mandatory/Mandatory |
| 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 term (NR) | Mandatory/Mandatory |
| ǂ3 | Materials specified (NR) | Optional/Optional |
| ǂ6 | Linkage (NR) | System supplied/System supplied |
| ǂ8 | Field link and sequence number (R) | Optional/Optional |
Definition |
An index term describing the activity or function that generated the described materials (e.g., property assessment or voter registration). |
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1st Indicator |
Undefined. The 1st indicator position is undefined and contains a blank.
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2nd Indicator |
Source of term. The source of the index term is contained in subfield ǂ2.
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Subfields |
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| ǂa Function | A term specifying the function or activity which generated the materials.
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| ǂv Form subdivision | A specific kind or genre of material defined by the thesaurus being used. Use only when a form subject subdivision is added to a term. Use subfield ǂx if the terms function as general subdivisions. A form subdivision in subfield ǂv is generally the last subfield in the field. Repeat subfield ǂv if you use more than one form subdivision.
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| ǂx General subdivision | A subject subdivision that is not more appropriately contained in subfield ǂv, ǂy, or ǂz. Use subfield ǂx only when a general topical subdivision is added to a term.
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| ǂy Chronological subdivision | A subject subdivision that represents a period of time. Use only when a chronological subject subdivision is added to a term.
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| ǂz Geographic subdivision | A geographic subject subdivision. Use only when a geographic subject subdivision is added to a term.
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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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| ǂ2 Source of term | A MARC code that identifies the source list from which the index term was assigned. See Function Term Source Codes.
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| ǂ3 Materials specified | For information about subfield ǂ3, 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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| ǂ8 Field link and sequence number | For information about subfield ǂ8, see Control Subfields. |
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Indexing |
Field 657 is not indexed. |
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MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 657. |