070 National Agricultural Library Call Number (R)
Record Type |
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BIB |
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Input Standards |
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| Field (Full/Minimal) | ||
| Required if applicable/Optional | ||
| 1st Indicator Existence in NAL collection | ||
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No information provided | |
| 0 | Item is in NAL | |
| 1 | Item is not in NAL | |
| 2nd Indicator Undefined | ||
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Undefined | |
| Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards (Full/Minimal) | |
| ǂa | Classification number (R) | Mandatory/Mandatory |
| ǂb | Item number (NR) | 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 |
| ǂ6 | Linkage (NR) | System supplied/System supplied |
| ǂ8 | Field link and sequence number (R) | Optional/Optional |
Definition |
National Agricultural Library (NAL) uses field 070 for NAL call numbers. |
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Guidelines |
The call number may be either complete or incomplete. You may use field 070 for transcribing NAL copy. |
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| Multiple call numbers | Certain classification choices are recognized to be local decisions. Multiple call numbers in the same classification scheme in a WorldCat record may be appropriate under certain circumstances. For more information, see 050-099 Introduction to Call Numbers. |
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1st Indicator |
Existence in NAL collection. Whether the item is in NAL's collection. |
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2nd Indicator |
Undefined. The 2nd indicator position is undefined and contains a blank.
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Subfields |
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| ǂa Classification number | The classification number portion of the NAL number.
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| ǂb Item number | The NAL item number.
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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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| 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 |
For indexing and searching information, see Searching WorldCat Indexes, Fields 040-096. |
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MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 070. |