020 International Standard Book Number (R)
Input Standards | |||
| Required if applicable/Required if applicable | |||
| 1st Indicator Undefined | |||
 | Undefined | ||
| 2nd Indicator Undefined | |||
| | Undefined | ||
| Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards | ||
| ‡a | International Standard Book Number (NR) | Required if applicable/Required if applicable | |
| ‡b | Binding information (R) | Obsolete. Do not use/Obsolete. Do not use | |
| ‡c | Terms of availability (NR) | Optional/Optional | |
| ‡z | Canceled/invalid ISBN (R) | Required if applicable/Required if applicable | |
Definition | Contains the International Standard Book Number (ISBN). Use for terms of availability (e.g., price), canceled ISBNs, invalid ISBNs, and SBNs. An ISBN is a unique number assigned to an item by its publisher. Each ISBN is a ten- or thirteen-digit number and has four parts: the language group of the country of publication, the publisher, the title, and the check character. Thirteen-digit ISBNs must begin with either 978 or 979 (a 13-digit EAN beginning with 978 or 979 may be input as a valid ISBN). If printed in a book, catalog or bibliography, these four parts are usually separated by hyphens. Do not enter the hyphens. If the final character is an x, enter an uppercase X. | ||||||||||||||||||||||||||||||||||||
| Coding EANs and ISBNs | The table below summarizes how to code EANs and ISBNs.
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| Entering multiple ISBNs | Use the following guidelines for entering multiple ISBNs:
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| Validation | The final character of an ISBN 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 020, the system checks subfield ‡a to verify that the content and length of the ISBN are correct and that the check character matches the calculated check character. If there is an error in the ISBN (e.g., it is too long or too short, has an incorrect character in any position or an incorrect value in the check digit), the system displays an error message with the ISBN remaining in subfield ‡a. If you made a typographical error, correct the ISBN and validate the record again. If the error message appears again and you transcribed the ISBN exactly, the ISBN is in error. Put the ISBN in subfield ‡z. | ||||||||||||||||||||||||||||||||||||
| Deleting ISBNs | If a record contains two ISBNs and you delete one, the system will regenerate the one you deleted and add it to the record. To avoid this situation, delete both ISBNs. | ||||||||||||||||||||||||||||||||||||
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 | ISBD records. Enter the ISBN, terms of availability, and qualifications as prescribed by AACR2. Enter terms of availability and qualifications in subfield ‡c, even if no ISBN is available. Enter binding information for all types of binding other than regular hardbound in subfield ‡a following the ISBN, or in subfield ‡z following the invalid ISBN. Enter all binding information in parentheses. See the Library of Congress Rule Interpretation 1.8 for more information. If no ISBN, enter binding information in subfield ‡c following the price. Non-ISBD records. Abbreviate binding information and enter it in parentheses in subfield ‡a, following the ISBN. Enter a space between the binding information and the ISBN. Do not enter binding identification for standard trade editions.
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| ‡a International Standard Book Number | You may also use subfield ‡a for a qualification (e.g., binding information). | ||||||||||||||||||||||||||||||||||||
| ‡b Binding information | Obsolete. Do not use. | ||||||||||||||||||||||||||||||||||||
Note: Subfield ‡b was valid for BKS, MAP and SCO formats only. | |||||||||||||||||||||||||||||||||||||
| ‡c Terms of availability | ISBD records. Enter price information in subfield ‡c. Non-ISBD records. Do not enter any price information.
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| ‡z Canceled/invalid ISBN | ISBNs can be invalid in two ways:
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Printing | Field 020 subfield ‡a prints as the last note following notes printed from the 5xx Fields. Subfields ‡b, ‡c and ‡z do not print. | ||||||||||||||||||||||||||||||||||||
If subfield ‡a is not present, no data from field 020 prints. If an ISBN in subfield ‡a has fewer or more than ten digits or has a letter other than X as the tenth character, the ISBN does not print. The print program supplies the display constant ISBN before the number in subfield ‡a. The print program supplies hyphens within the ISBN, according to the following algorithm. You must enter all other punctuation for printing.
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| Printing multiple 020 fields | Only the first 020 field prints. If the first 020 does not print, no ISBN prints, even if a subsequent 020 field has a valid number in subfield ‡a .
Standard Book Numbers Some records still use Standard Book Numbers (the forerunner of modern ISBNs). If the item was published in Australia, Canada, New Zealand, Zimbabwe, South Africa, the United Kingdom, or the United States, enter an initial 0 before the Standard Book Number (SBN). Enter the SBN in subfield ‡a . Enter SBNs from other countries in subfield ‡z . For example, if the SBN is 717803139, enter:
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