023 Cluster ISSN (R)
Record Type |
||
BIB, LHR |
||
Input Standards |
||
| Field (Full/Minimal) | ||
| Required if applicable/Required if applicable | ||
| 1st Indicator Type of Cluster ISSN | ||
| 0 | ISSN-L | |
| 1 | ISSN-H | |
| 2nd Indicator Undefined | ||
 |
Undefined | |
| Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards (Full/Minimal) | |
| ǂa | Cluster ISSN (NR) | Required if applicable/Required if applicable |
| ǂy | Incorrect Cluster ISSN (R) | Required if applicable/Required if applicable |
| ǂz | Canceled Cluster ISSN (R) | Required if applicable/Required if applicable |
| ǂ0 | Authority record control number or standard number (NR) | Optional/Optional |
| ǂ1 | Real World Object URI (R) | Optional/Optional |
| ǂ2 | Source (NR) | ISSN national agency and CONSER use only/ISSN national agency and CONSER use only |
| ǂ6 | Linkage (NR) | System supplied/System supplied |
| ǂ8 | Field link and sequence number (R) | Optional/Optional |
Definition |
Contains the Cluster ISSN, a mechanism first defined in ISO 3297:2020 to provide for the identification of specific groups of ISSN (International Standard Serial Number), such as the various medium editions of a continuing resource, or serials related by preceding and succeeding title relationships. |
||||||||||||
| Validation | The final character of an Cluster ISSN is a calculated check character, either numeric, 0-9, or X. It is used to identify and eliminate typographical errors. When you validate a record containing field 023, the system checks the ISSN 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 Cluster ISSN (e.g., the Cluster ISSN is too long or too short, lacks a hyphen after the fourth digit, or has an invalid check digit), the system displays an error message and the Cluster ISSN remains in subfield ǂa. If you made a typographical error, correct the Cluster ISSN and validate the record again. If the error message appears again and you transcribed the Cluster ISSN exactly, the Cluster ISSN is in error. Put the Cluster ISSN in subfield ǂy . |
||||||||||||
1st indicator |
Type of Cluster ISSN. The appropriate prefix for the ISSN type denoted by the first indicator value may be generated for display. |
||||||||||||
|
|||||||||||||
|
|||||||||||||
2nd Indicator |
Undefined. The 2nd indicator position is undefined and contains a blank.
|
||||||||||||
Subfields |
|||||||||||||
| ǂa Cluster ISSN | As designated by the ISSN International Centre, Cluster ISSNs group together resources with specific relationships to each other such as medium versions (ISSN-L), and clusters such as earlier and later titles (ISSN-H).
|
||||||||||||
| ǂy Incorrect Cluster ISSN | Cluster ISSN that has been incorrectly associated with the continuing resource or incorrectly formatted on the resource. Each incorrect Cluster ISSN is contained in a separate ǂy.
|
||||||||||||
| ǂz Canceled Cluster ISSN | Cluster ISSN that has been associated with the resource but subsequently canceled, often because a duplicate Cluster ISSN was assigned. Each canceled Cluster ISSN is contained in a separate ǂz.
|
||||||||||||
| ǂ0 Authority record control number or standard number | A URI for the Cluster ISSN in subfield ǂa. For more information about subfield ǂ0, see Control Subfields. |
||||||||||||
| ǂ1 Real World Object URI | For information about subfield ǂ1, see Control Subfields. |
||||||||||||
| ǂ2 Source | ISSN Center responsible for assigning and maintaining Cluster ISSNs and related data.
The most commonly used codes are:
For the full list of codes, see the List of Country and ISSN Centre Codes. For information about subfield ǂ2, see Control Subfields. |
||||||||||||
| 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. |
||||||||||||
| ǂ8 Field link and sequence number | For information about subfield ǂ8, see Control Subfields. |
||||||||||||
Indexing |
Field 023 is not indexed. |
||||||||||||
MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 023. |