030 CODEN Designation (R)
Record Type |
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BIB |
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Input Standards |
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| Field (Full/Minimal) | ||
| Required if applicable/Required if applicable | ||
| 1st Indicator Undefined | ||
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Undefined | |
| 2nd Indicator Undefined | ||
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Undefined | |
| Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards (Full/Minimal) | |
| ǂa | CODEN (NR) | Required if applicable/Required if applicable |
| ǂz | Canceled/invalid CODEN (R) | Required if applicable/Required if applicable |
| ǂ6 | Linkage (NR) | System supplied/System supplied |
| ǂ8 | Field link and sequence number (R) | Optional/Optional |
Definition |
Contains the CODEN designation assigned to a periodical title by the Chemical Abstracts Service. Each CODEN consists of four mnemonic letters and a fifth letter, A, B, C, or D. The sixth character, a check character, is alphabetic or numeric. |
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| Validation | The sixth character of a CODEN is a calculated check character, either numeric, 2-9, or alphabetic, A-Z. It is used to identify and eliminate typographical errors. When you validate a record containing field 030, the system checks the CODEN in subfield ǂa to verify that the content and length are correct and that the check character matches the calculated check character. If there is an error in the CODEN (e.g., the CODEN is too long or too short, has an incorrect character in any position, or incorrect value in the check digit), the system displays an error message with the CODEN remaining in subfield ǂa. If you made a typographical error, correct the CODEN and validate the record again. If the error message appears again and you transcribed the CODEN exactly, the CODEN is in error. Put the CODEN in subfield ǂz. |
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1st Indicator |
Undefined. The 1st indicator position is undefined and contains a blank.
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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 CODEN | Enter the entire CODEN and the check character. Do not enter spaces or punctuation (e.g., hyphens) which may appear between the fourth and fifth characters.
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| ǂz Canceled/invalid CODEN | Enter the number in the same form as a valid CODEN. |
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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, field 030. |
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MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 030. |