OCLC has installed changes related to the OCLC-MARC Update 2018, implementing MARC 21 Bibliographic and Holdings format changes
announced by the Library of Congress in MARC 21 Updates Number 25 (December 2017; http://www.loc.gov/marc/marc21_update25_online.html) and Number 26 (April
2018; http://www.loc.gov/marc/marc21_update26_online.html), as well as all MARC codes announced by the Library of Congress between November 2017 and July 2018.
See the WorldCat Validation Release Notes at https://help.oclc.org/Metadata_Services/WorldShare_Record_Manager/WorldCat_validation_release_notes_and_known_issues/2018_release_notes/100_WorldCat_validation_release_notes_September_2018.
Specific details of the 2018 Update are available in OCLC Technical Bulletin 268, which is available at https://help.oclc.org/WorldCat/Cataloging_documentation/Technical_Bulletins/268,
including:
- In the Bibliographic and Holdings field 007 for Maps, a new code “x” (Not Applicable) is defined in subfield $e (007/04, Physical Medium) for remote digital resources. Documentation-only changes have also been made in subfields $b (007/01, Specific Material Designation) and $g (007/06, Production/Reproduction Details).
- Bibliographic field 257 (Country of Producing Entity) has had its scope broadened to include areas not legally recognized as countries.
- Bibliographic field 382 (Medium of Performance) has had its subfield $r (Total Number of Individuals Performing Alongside Ensembles) redescribed.
- Bibliographic field 730 (Added Entry – Uniform Title) has had subfield $4 (Relationship) added.
- New Bibliographic field 758 (Resource Identifier) has been defined.
- New subfields $t (Report Number), $u (Standard Technical Report Number), and $z (ISBN) have been added to the Bibliographic field 777 (Issued With Entry).
- Subfield $d (Date of Meeting or Treaty Signing) has been made Repeatable in all Bibliographic Meeting Name fields.
- Subfield $s (Version) has been made Repeatable in 31 Bibliographic fields.
- Bibliographic subfield $0 (Authority Record Control Number or Standard Number) has been slightly redefined.
- Subfield $1 (Real World Object URI) has been defined in over 90 Bibliographic fields and four Holdings fields.
- Subfield $3 (Materials Specified) has been added to Bibliographic fields 377 (Associated Language), 380 (Form of Work), 381 (Other Distinguishing Characteristics of Work or Expression), 383 (Numeric Designation of Musical Work), and 384 (Key).
Additionally, OCLC has implemented the corresponding MARC 21 Authority Format changes to the WorldCat validation rule set that includes all valid elements of the MARC 21 Authority Format, including:
- Authority field 382 (Medium of Performance) has had its subfield $r (Total Number of Individuals Performing Alongside Ensembles) redescribed.
- Subfield $d (Date of Meeting or Treaty Signing) has been made Repeatable in Authority Meeting Name fields 111, 411, 511, and 711.
- Subfield $s (Version) has been made Repeatable in 16 Authority fields.
- Subfield $1 (Real World Object URI) has been defined in 61 Authority fields.
Although MARC 21 Authority Format changes from MARC 21 Updates No. 25 and No. 26 are documented in Technical Bulletin 268, the Authority record changes will be implemented in the LC/NACO Authority File NOT AT THIS TIME but instead
at a future date in coordination with the Library of Congress and the Name Authority Cooperative (NACO) of the Program for Cooperative Cataloging (PCC). LC, NACO, and OCLC will make announcements at that future date.
Please forgive any duplication of this message.
jay
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| Jay Weitz |
| OCLC · Senior Consulting Database Specialist, WorldCat Metadata Quality, Global Product Management |
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