[DCRM-L] WorldCat Matching Release Notes, August 2020

Tue Aug 25 11:13:30 MDT 2020

If  you are suggesting creating separate records for every copy of pre-1829 (or for that matter pre-1800 or even pre-1501) items, please do NOT do this. The same rule applies in OCLC to rare as to general materials: one record per manifestation (per language of cataloging). Rare materials are afforded some leeway in the definition of "manifestation"--we can create separate records for separate states, including separate printings, but NOT for separate copies, however unique (e.g. signed by Abraham Lincoln) our copy may be.

Note, this announcement is simply an announcement that OCLC has revised its automated duplicate detection/merge program so that it won't touch anything with a publication date before 1830 (the previous date was 1800); it also won't touch anything coded with a rare materials cataloging code in 040, including post-1829 materials if so coded. Of related interest, this list has been following the progress of a group (of which I am a member) working out policies and procedures for manual merging of duplicate rare materials records in Connexion. The document for books is complete (but I can't find it posted on OCLC's policies pages yet); we're currently working on scores, maps, and graphic materials.

Bob

Robert L. Maxwell
Ancient Languages and Special Collections Cataloger
6728 Harold B. Lee Library
Brigham Young University
Provo, UT 84602
(801)422-5568

"We should set an example for all the world, rather than confine ourselves to the course which has been heretofore pursued"--Eliza R. Snow, 1842.

________________________________
From: DCRM-L <dcrm-l-bounces at lib.byu.edu> on behalf of Bob Kosovsky <bobkosovsky at nypl.org>
Sent: Tuesday, August 25, 2020 9:51 AM
To: DCRM Users' Group <dcrm-l at lib.byu.edu>
Subject: Re: [DCRM-L] WorldCat Matching Release Notes, August 2020

Thank you very much Francis for posting this amplification of Jay Weitz's announcement.

This has me wondering.  For those of us that want to bring out the uniqueness of our individual copies, should we approach all pre-1829 items as if we're back to RLIN, where each item gets its own record because of its distinctiveness?  (Presumably if we have an item that does not appear to be distinctive we can simply cluster it to a similar item.)  Or could we simply copy catalog and add $5 [library code] to our distinctive features?  I'm sorry I can't recall someone's statement that all publications before a certain date should be considered unique (certainily 1501), but if not 1829, how much earlier?

Of course it depends on the cataloger's perception of the uniqueness of a particular copy.  I realize this is heavily dependent on cataloger's judgement, but I'd like to get a sense of what people are thinking where they want to go with this.

Bob Kosovsky, Ph.D. -- Librarian, Rare Books and Manuscripts,
Music & Recorded Sound Division
The New York Public Library for the Performing Arts - Dorothy and Lewis B. Cullman Center

40 Lincoln Center Plaza, New York, NY 10023

www.nypl.org<http://www.nypl.org>

On Tue, Aug 25, 2020 at 10:54 AM Lapka, Francis <francis.lapka at yale.edu<mailto:francis.lapka at yale.edu>> wrote:

Here’s an elaboration, at the link that Jay provides below:

Rare Materials Exemption for DDR is Now Up to and Including 1829

In close consultation with the Bibliographic Standards Committee (BSC) of the Rare Books and Manuscripts Section (RBMS) of the Association of College and Research Libraries (ACRL) division of the American Library Association (ALA), the demarcation date for the infrequent automated merging of duplicate records for older materials has been changed. DDR processing now exempts all bibliographic records with dates of production/publication up to and including 1829. Previously, the demarcation had been records with dates of production/publication earlier than 1800. For cartographic materials, DDR continues to exempt records with dates of publication earlier than 1901, as determined in consultation with ALA’s Map and Geospatial Information Round Table (MAGIRT) Cataloging and Classification Committee (CCC). Also still exempted from DDR processing are all records identified in field 040 subfield $e as being cataloged under any of the following MARC Description Convention Source Codes<https://www.loc.gov/standards/sourcelist/descriptive-conventions.html> for rare and/or archival materials: amim, amremm, appm, bdrb, cgcrb, cco, dacs, dcgpm, dcrb, dcrmb, dcrmc, dcrmg, dcrmm, dcrmmss, dcrms, dmbsb, enol, estc, gihc, iosr, ohcm, rad, rna, vd16, vd17.

I’d like to thank Jay and OCLC for their responsiveness to input from our community.

Best,

Francis

From: DCRM-L <dcrm-l-bounces at lib.byu.edu<mailto:dcrm-l-bounces at lib.byu.edu>> On Behalf Of Weitz,Jay
Sent: Thursday, August 20, 2020 4:57 PM
To: DCRM Users' Group <dcrm-l at lib.byu.edu<mailto:dcrm-l at lib.byu.edu>>
Subject: [DCRM-L] WorldCat Matching Release Notes, August 2020

Between March and July 2020, OCLC installed changes to WorldCat matching, including the following improvements and bug fixes:

  *   Duplicate Detection and Resolution (DDR) Matching:
     *   Rare Materials Exemption for DDR is Now Up to and Including 1829.
     *   Improved DDR Matching of Serials with Generic Titles.
     *   Improved DDR Matching for Place of Publication.
     *   Stricter DDR Matching of Serials When Associated Corporate Bodies have Different Subordinate Units.
  *   Data Sync/Fingerprint Matching
     *   Improved Fingerprint Comparison for Place of Publication.
     *   Stricter Fingerprint Matching of Serials When Associated Corporate Bodies have Different Subordinate Units.
  *   Bug Fixes
     *   Fix to the Creation of Fingerprints for Cross-Reference Records.

These improvements have been prompted primarily by feedback from and consultation with members of the OCLC cooperative and were accomplished by the discussion, investigation, and testing work of the matching team at OCLC.

See the WorldCat Matching Release Notes, August 2020<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhelp.oclc.org%2FMetadata_Services%2FWorldShare_Record_Manager%2FWorldCat_Matching_release_notes_and_known_issues%2F2020_Release_notes%2F095WorldCat_Matching_release_notes_August_2020&data=02%7C01%7Cfrancis.lapka%40yale.edu%7C891a87b33bcb4c2ca8c008d8454baa6b%7Cdd8cbebb21394df8b4114e3e87abeb5c%7C0%7C0%7C637335538590107416&sdata=FeT0SCsLgxwvq91oYwL9T9l7hdvzmaGjGMH4pYzCsAQ%3D&reserved=0> for more details.

Please forgive any duplication of this message.

jay

--

Jay Weitz

OCLC · Senior Consulting Database Specialist, WorldCat Metadata Quality, Global Product Management

6565 Kilgour Place, Dublin, Ohio USA 43017

T +1-614-764-6156 · T +1-800-848-5878 x6156 · F +1-614-718-7195

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