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MARC PROPOSAL NO. 2021-08

DATE: December 22, 2020
REVISED:

NAME: Defining a New Field for Encoded Supplementary Content Characteristics in the MARC21 Bibliographic Format

SOURCE: Network Development and MARC Standards Office (NDMSO), Library of Congress

SUMMARY: This paper proposes the creation of a new MARC field 353 in the MARC 21 Bibliographic Format to store coded supplementary content information.

KEYWORDS: Field 353 (BD); Supplementary Content Characteristics (BD)

RELATED: 2020-DP15, 2020-DP02, 2017-08

STATUS/COMMENTS:
12/22/20 – Made available to the MARC community for discussion.

01/27/21 – Results of MARC Advisory Committee discussion: Approved, with the amendment that the 353 field definition should stipulate that the field applies only when the supplementary content represents a significant part of the resource described.

04/28/21 - Results of MARC Steering Group review - Agreed with the MAC decision.


Proposal No. 2021-08: Defining a New Field for Encoded Supplementary Content Characteristics

1. BACKGROUND

As part of the BIBFRAME cataloging pilot at the Library of Congress, the development team has tried to introduce data entry efficiencies and improve consistency of data. In the BIBFRAME editor, menu options that are tied to a controlled vocabulary have been widely used to capture such information as RDA Content/Media/Carrier Type, MARC relator codes, and headings from the LCNAF, LCSH, LCGFT and LCMPT files. The vocabulary lists have been constructed from term lists defined in the RDA Registry, term lists defined in controlled MARC fields, or a combination of the two. The URIs for these terms are added to the BIBFRAME data during the MARC to BIBFRAME conversion process.

NDMSO is now evaluating the conversion of BIBFRAME data to MARC. This analysis has shown that some MARC fields which contain data from a controlled vocabulary do not have a place for the standard identifier or URI of the term.

2. DISCUSSION

In 2020-DP02, an option to add $0 to fields 504 and 525 was presented. There was a broad consensus by the MARC Advisory Committee that a need for the proposed changes had been demonstrated, but there was also general agreement that the provision for eye-readable notes must also be retained should the paper move forward to the proposal stage. Some MAC members preferred the option of seeing identifiers and controlled language for indexes, bibliographies and other supplementary information encoded within the 3XX block. 2020-DP15 then offered two options for the treatment of supplementary content information. Based on feedback from the MAC members, the option to create a new MARC field for encoded supplementary content information is proposed here.

3. PROPOSED CHANGES AND EXAMPLES

Define new field 353 in the Bibliographic format as follows:

353 – Supplementary Content Characteristics (R)

Field Definition and Scope
Encoded information on the presence of one or more bibliographies, discographies, filmographies, and/or other bibliographic references in a described item or in accompanying material.

First Indicator
Undefined
# - Undefined
Second Indicator
Undefined
# - Undefined

Subfield Codes

$a - Supplementary content term (R)
Supplementary content information of the resource being described.

353 ## $a bibliography
353 ## $a index
353 ## $a biography of creator

$b – Supplementary content code (R)
Code representing the supplementary content information of the resource being described.

353 ## $a discography $b discography
353 ## $a index $b index
353 ## $a biography of creator $b creatorbio

$0 - Authority record control number or standard number (R)
See description of this subfield in Appendix A: Control Subfields.

353 ## $a music $b music $0 http://id.loc.gov/vocabulary/msupplcont/music
353 ## $a index $b index $0 http://id.loc.gov/vocabulary/msupplcont/index
353 ## $a biography of creator $b creatorbio $0 http://id.loc.gov/vocabulary/msupplcont/creatorbio

$1 - Real World Object URI (R)
See description of this subfield in Appendix A: Control Subfields.

$2 - Source (NR)
MARC code that identifies the source of the term or code used to record the supplementary content characteristics information.

$3 - Materials specified (NR)
Part of the described materials to which the field applies.

$6 - Linkage (NR)
See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number (R)
See description of this subfield in Appendix A: Control Subfields.

4. BIBFRAME DISCUSSION

BIBFRAME Work or Instance: bf:supplementaryContent (property), bf:SupplementaryContent (class), accommodating either a designation of the supplementary content as a URI from a list or as a literal.

The current MARC-to-BIBFRAME data conversion generates supplementary content fields from data in MARC fields 504 and 525. Supplementary content is also created from MARC 008/24-27 for codes "b", "i", "k", "q" and 31 (books), 008/24-27 (continuing resources), 008/31 (maps) and 008/24-29 (music). Supplementary content from these bytes in field 008 is assigned an identifier from a term list.

Including subfield $0 in the above fields will enable a smooth conversion of BIBFRAME data to the MARC format that preserves the URIs that come from the BIBFRAME description, since URIs added within a BIBFRAME editor, or by a MARC to BIBFRAME data conversion, will be preserved.

5. SUMMARY OF PROPOSED CHANGES

Define new field 353 in the MARC 21 Bibliographic Format as follows:


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