Record Type |
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BIB |
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Input Standards |
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Field (Full/Minimal) | ||
Optional/Optional | ||
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 | Presentation format (R) | Required if applicable/Required if applicable |
ǂb | Projection speed (R) | Required if applicable/Required if applicable |
ǂc | Aspect ratio value (R) | Required if applicable/Required if applicable |
ǂd | Aspect ratio designator (R) | Required if applicable/Required if applicable |
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 a moving image resource. For information on punctuation, see the Punctuation section below. |
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Guidelines |
Prefer use of a separate field for each unique term. For instance, a wide screen video: |
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For 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 Presentation format | The format used in the production of a projected image (e.g., Cinerama, IMAX). For a list of RDA-controlled terms, see RDA Presentation Format. RDA 3.17, Projection Characteristic of Motion Picture Film, is explicitly limited to technical specifications relating to the projection of actual motion picture film. Presentation format is treated in RDA 3.17.2 and recorded here in subfield ǂa. This subfield is not to be used for any video format. Do not confuse presentation format with aspect ratio, which is treated in RDA 7.19. Numerical aspect ratios are recorded in field 345 subfield ǂc. Verbal aspect ratio designators are recorded in field 345 subfield ǂd.
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ǂb Projection speed | The speed at which a projection device must be operated to produce the moving image intended. RDA 3.17, Projection Characteristic of Motion Picture Film, is explicitly limited to technical specifications relating to the projection of actual motion picture film. Projection speed is treated in RDA 3.17.3 and recorded here in subfield ǂb. This subfield is not to be used for any video format.
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ǂc Aspect ratio value | A numerical ratio of the width to the height of a moving image. This subfield may be used for all moving image media including film, video, and online resources.
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ǂd Aspect ratio designator | A general description of the ratio of the width to the height of a moving image. This subfield may be used for all moving image media including film, video, and online resources. For a list of RDA-controlled terms, see RDA Aspect Ratio Designation.
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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 345. |
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MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 345. |
This page last revised: October 12, 2022