Bytes | ALL: 008/38 |
Input standards | ALL: Required if applicable. One-character code. Default:  |
Definition | |
| All formats | Whether bibliographic information was modified for entry into machine-readable form. |
Guidelines | |
| Transcribing printed copy | Use the following guidelines when transcribing LC or NLM printed copy. If more than one MRec code applies, use the codes according to the following order of preference: s, d, x, r, o. | | | Leave the default value of blank if transcribing LC or NLM cataloging exactly as found on LC or NLM printed copy. Modernization of a form of heading or of subject terminology does not require an MRec code. If the printed copy has incidental non-Latin characters, unusual mathematical symbols or other special characters not included in the OCLC character set, follow these guidelines: - Consider the copy to have incidental non-Latin or special characters if these characters occur in one field (or a portion of one field) among fields 245–260 or 4xx.
- Romanize non-Latin characters and describe special symbols with a word or phrase.
- Enclose the romanized or modified characters within brackets. (Romanization may apply to a single letter, to a single word, to several words or to the entire field.) Since the brackets identify modified characters, you need not indicate modification. Leave MRec blank.
- If two or more fields among fields 245–260 or 4xx require romanization, see code r.
| | s | Use code s to indicate that some data was omitted in order to comply with system limits. MARC bibliographic records have a maximum length of 99,999 characters. For more information, see MARC 21 Record Specifications for Record Structure, Character Sets, and Exchange Media ( http://www.loc.gov/marc/specifications/specrecstruc.html). | | d | If a pre-AACR2 record (e.g., retrospective cataloging being converted to machine-readable form), has a "dashed-on" entry, do not enter the dashed-on information. Enter your OCLC symbol in field 040 subfield ‡d and use code d. Create a separate bibliographic record describing the dashed-on item. | | r | If LC or NLM cataloging is in a non-Latin alphabet, enter the record in romanized form. LC prints non-Latin cataloging for Chinese, Japanese, Korean, Arabic, Persian and the Hebraic script. In such cases, use code r and enter your OCLC symbol in 040 subfield ‡d | | o | If LC or NLM cataloging is itself romanized, enter the record in romanized form. LC romanizes its printed cataloging for non-Latin alphabets, except Chinese, Japanese, Korean, Arabic, Persian and the Hebraic script. In such cases, use code o but do not enter your OCLC symbol in field 040 subfield ‡d since the machine-readable record matches the printed record. |
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| Original cataloging | Use the following guidelines if you are inputting original cataloging and other non-LC or non-NLM cataloging. If more than one MRec code applies, use codes according to the following order of preference: s, r, o. | | | Not modified If the original bibliographic data has incidental non-Latin characters, unusual mathematical symbols or other special characters not included in the character set, follow these guidelines: - Consider the data to have incidental non-Latin or special characters if these characters occur in one field (or a portion of one field) among fields 245–260 or 4xx.
- Romanize non-Latin characters and describe special symbols using a word or phrase.
- Enclose the romanized or modified characters within brackets. Romanization may apply to a single letter, to a single word, to several words or to the entire field. Since the brackets identify modified characters, no additional indication of modification is necessary, leave MRec blank.
- If two or more fields among fields 245–260 or 4xx require romanization. See codes r and o.
| | o | If the original bibliographic data are in a non-Latin alphabet, enter the record in romanized form. If LC printed cataloging for the item would also be romanized, use code o. LC romanizes its printed cataloging for non-Latin alphabets, except Chinese, Japanese, Korean, Arabic, Persian and Hebraic script. | | r | If the original bibliographic data are in a non-Latin alphabet, enter the record in romanized form. If LC printed cataloging for the item would also be in a non-Latin alphabet, use code r. LC prints non-Latin cataloging for Chinese, Japanese, Korean, Arabic, Persian and Hebraic script. | | s | Use code s to indicate that some data was omitted in order to comply with system limits. MARC bibliographic records have a maximum length of 99,999 characters. For more information, see MARC 21 Record Specifications for Record Structure, Character Sets, and Exchange Media ( http://www.loc.gov/marc/specifications/specrecstruc.html). |
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Codes | |
| | | | Not modified | |
| | | d | Dashed-on information omitted. Pre-AACR2 only. | |
| | | o | Completely romanized/printed cards romanized | |
| | | r | Completely romanized/printed cards in script | |
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| | | u | Unknown. Obsolete. Do not use. | |
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