347 Digital File Characteristics (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 | File type (R) | Required if applicable/Optional |
| ǂb | Encoding format (R) | Required if applicable/Optional |
| ǂc | File size (R) | Required if applicable/Optional |
| ǂd | Resolution (R) | Required if applicable/Optional |
| ǂe | Regional encoding (R) | Required if applicable/Optional |
| ǂf | Encoded bitrate (R) | Required if applicable/Optional |
| ǂ0 | Authority record control number or standard number (R) | Optional/Optional |
| ǂ1 | Real World Object URI (R) | Optional/Optional |
| ǂ2 | Source (NR) | Required if applicable/Required if applicable |
| ǂ3 | Materials specified (NR) | Optional/Optional |
| ǂ6 | Linkage (NR) | System supplied/System supplied |
| ǂ8 | Field link and sequence number (R) | Optional/Optional |
Definition |
Technical specifications relating to digital encoding of text, image, audio, video, and other types of data in a tangible resource. This information could also be recorded in field 300 subfield ǂb. File type (subfield ǂa) and file size (subfield ǂc) are core elements under RDA for cartographic materials only. For information on punctuation, see the Punctuation section below. |
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Guidelines |
Use field 347 for both tangible and online electronic resources. Prefer use of a separate field for each unique term. For example, for an audio CD: |
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For a JPEG file:
For a PDF text document:
For a DVD videodisc:
Under Provider-Neutral practices, file size in subfield ǂc should be omitted for online resources because it may differ from one iteration to another. See Provider-Neutral E-Resource MARC Record Guide: P-N/RDA Version for additional guidance. For guidance on describing and encoding the attributes of notated music and audio carriers, see the Music Library Association's Best Practices for Music Cataloging Using RDA and MARC 21 for Chapter 3, Best Practices for Music Cataloging Using RDA and MARC 21 for Chapter 7, and "Supplement 1" of the Music Library Association's Supplements to Best Practices for Music Cataloging Using RDA and MARC21. For additional guidance on describing and encoding the attributes of video recording carriers, see OLAC Online Audiovisual Catalogers' Best Practices for Cataloging DVD-Video and Blu-Ray Discs. |
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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 File type | A general type of data content encoded in a computer file. For a list of RDA-controlled terms, see RDA File Type.
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| ǂb Encoding format | A schema, standard, or format used to encode the digital content of a resource.
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| ǂc File size | The number of bytes in a digital file. Under Provider-Neutral practices, file size should be omitted for online resources because it may differ from one iteration to another.
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| ǂd Resolution | The clarity or fineness of detail in a digital image, expressed by the measurement of the image in pixels, etc.
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| ǂe Regional encoding | A code identifying the region of the world for which a digital file has been encoded. Such coding may prevent the file from being played on a device from a different region. For a list of RDA-controlled terms, see RDA Regional Encoding.
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| ǂf Encoded bitrate | The speed at which streaming audio or video is designed to play.
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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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| ǂ2 Source | Identification of the source of the term when it is from a controlled list. For more information about subfield ǂ2, see Control Subfields.
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| ǂ3 Materials specified | For information about subfield ǂ3, see Control Subfields.
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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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Punctuation |
For records containing or omitting punctuation, follow these instructions:
For more information on punctuation, including OCLC policy, see section 2.8, Punctuation. |
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Indexing |
For indexing and searching information, see Searching WorldCat Indexes, field 347. |
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MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 347. |
This page last revised: April 21, 2022