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DATE: December 20, 2019
REVISED:
NAME: Renaming Field 345 and Defining New Subfields for Aspect Ratio and Motion Technique in the MARC 21 Bibliographic Format
SOURCE: Network Development and MARC Standards Office (NDMSO), Library of Congress
SUMMARY: This paper proposes renaming field 345 from "Projection Characteristics of Moving Image" to "Moving Image Characteristics" and adding new repeatable subfields to record the aspect ratio and motion technique of resources.
KEYWORDS: Field 345 (BD); Projection Characteristics of Moving Image (BD); Moving Image Characteristics (BD); Aspect Ratio (BD); Motion Technique (BD)
RELATED: 2017-05
STATUS/COMMENTS:
12/20/19 – Made available to the MARC community for discussion.
01/26/20 – Results of MARC Advisory Committee discussion: There was agreement that the proposed solution met the need, along with broad support for the proposed renaming and redefinition of field 345, which parallels other field names in the MARC 3XX block. But as with 2020-DP03, some MAC members wondered whether concepts of content and carrier had been mixed, and thus whether field 345 would be the correct place for this information. Consideration will be given to the issue when NDMSO works with OLAC to bring this paper back as a proposal.
Field 345 is currently defined in the Bibliographic format as follows:
Field Definition and Scope:
Technical specifications relating to the projection of a moving image resource.
Multiple values from the same source vocabulary may be recorded in the same field in separate occurrences of subfield $a (Presentation format). Terms from different source vocabularies are recorded in separate occurrences of the field.
In MARC Proposal No. 2017-05, a subfield to record color content was added to field 340 on the basis that RDA 7.17 defined color content as a separate element and provided a controlled vocabulary to use.
Similarly, RDA 7.19 defines Aspect Ratio. The instructions for recording both the numerical aspect ratio (e.g. 16:9, 4:3) and the aspect ratio designation (e.g. full screen, wide screen) are included, along with a vocabulary list to use for aspect ratio designation. These terms can be used to assign URIs and facilitate data exchange in a linked data environment.
Motion technique (e.g. animation, live action) is currently recorded in MARC field 008/34 (Visual materials) and does not have a unique RDA element other than the general 7.29 Note on Expression. The field is considered as an essential descriptive element by the motion picture and videorecording catalogers at the Library of Congress.
Information recorded in aspect ratio and motion technique is applicable to both moving images and videos. After an initial consideration to place this information in field 346, it was decided to modify the name and definition of field 345 to make it more broadly applicable.
The OLAC Best Practices for Cataloging DVD/Blu-ray – Version 1.1, states that Aspect ratio information can be recorded in multiple fields including 250 (Edition Statement) and 500 (General note). In addition, the current MARC-to-BIBFRAME conversion uses data in field 007/04 (Motion picture presentation format) to generate Aspect ratio designators.
Motion technique information is recorded in field 008/34 (Visual materials). The OLAC Best Practices for Cataloging DVD/Blu-ray – Version 1.1, states that the code input in this field is "informed by information from the MARC 520, 508, 245, 655, or notes fields."
To facilitate consolidation of the multiple places that this information can be recorded, we propose creating discrete subfields for each element -- $c for Aspect ratio value, $d for Aspect ratio designator, and $e for Motion technique.
In field 345 (Projection Characteristics of Moving Image) of the Bibliographic format, make the following changes:
Rename MARC field 345 to match the naming conventions of the other “… Characteristics” fields in the 34X block.
Rename as:
345 – Moving Image Characteristics (R)
Revise the field definition and scope to read:
Field Definition and Scope:
TechnicalSpecifications relating tothe projection ofa moving image resource.
Multiple values from the same source vocabulary may be recorded in the same field in separate occurrences ofsubfield $a (Presentation format)subfields. Terms from different source vocabularies are recorded in separate occurrences of the field.
Add the following new subfields to field 345:
$c – Aspect ratio value (R)
A numerical ratio of the width to the height of a moving image.$d – Aspect ratio designator (R)
A general description of the ratio of the width to the height of a moving image.$e – Motion technique (R)
Technique used in creating motion in motion pictures or videorecordings.
345 ## $c 16:9 $d wide screen
345 ## $d full screen $0 http://id.loc.gov/vocabulary/maspect/full
345 ## $e animation $0 http://id.loc.gov/vocabulary/mtechnique/anim
345 ## $c 16:9 $d letterboxed $e mixed aspect ratio
[If URIs are included, the above example could be represented as follows:]
345 ## $c 16:9
345 ## $d letterboxed $0 http://id.loc.gov/vocabulary/maspect/letbox.html
345 ## $d mixed aspect ratio $0 http://rdaregistry.info/termList/AspectRatio/1003 $2 rdaar
BIBFRAME Work or Instance: bf:aspectRatio (property), bf:AspectRatio (class), accommodating either a designation of the aspect ratio designation as a URI from a list or as a literal. The current MARC-to-BIBFRAME data conversion generates aspect ratio triples from field 007/04 (motion picture).
BIBFRAME Instance: bf:videoCharacteristic (property), class to be established, accommodating either a designation of the motion technique as a URI from a list or as a literal. The current MARC-to-BIBFRAME data conversion generates motion technique triples from field 008/34 (visual materials).
Storing this information in field 345 will also facilitate data conversion between MARC and BIBFRAME as the standard identifier or URI of the Aspect ratio designator and Motion technique terms can be retained along with the term’s label. Placing the numeric Aspect ratio value in a separate subfield allows it to be converted to an rdf:value while the Aspect ratio designator will create an rdfs:label.
6.1. Do you agree with proposed renaming and redefinition of field 345?
6.2. Do you agree there is a use for subfields in field 345 to record Aspect ratio and Motion technique?
6.3. Does the proposed solution meet the needs discussed?
6.4. Are there any potential consequences that this paper does not address?
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