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 |
| 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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| 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 070. |
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MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 070. |