https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=40311
Bug ID: 40311
Summary: New authority framework plugin for UNIMARC
(unimarc_field_676a_authorities.pl)
Change sponsored?: ---
Product: Koha
Version: Main
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P5 - low
Component: MARC Authority data support
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Background information
----------------------
Dewey Decimal Classification (DDC) [1] numbers can be stored in UNIMARC
authority records as follows ('R' and 'NR' denoting 'Repeatable' and
'Non-Repeatable' fields/subfields, respectively):
676 - DEWEY DECIMAL CLASSIFICATION (DDC) (R)
676$a - DDC Number, Single or Beginning of a Range (NR)
676$b - DDC number, End of a Range (NR)
Since 2024, both MARC21 and UNIMARC standards have been updated to enable
storing information in the form of Real World Object URIs, corresponding
to either a single DDC number or a DDC number range. Such URIs are stored
in UNIMARC subfield 676$R (notice: uppercase 'r'). An example would be:
676 # # $a 248.4819
$c Orthodox Church--guides to Christian life
$v 23
$R https://id.oclc.org/worldcat/ddc/E3C6vtHXW4B47QbmtQWxmmH3PQ
For more information, please refer to the IFLA UNIMARC Authorities Format
Manual (online edition) [2].
The OCLC Dewey Linked Data API
------------------------------
OCLC recently [3] started offering a Linked Data (LD) [4] API [5] that
allows looking up DDC numbers to obtain unique URIs/URLs and Descriptions
for a particular DDC number (or range). In addition to API searches, a
smaller subset of the LD can also be browsed online in a hierarchical
manner [6].
Reasoning behind this Bug report
--------------------------------
We believe that Koha users who include DDC numbers in their authority
cataloguing would benefit from an integration with the OCLC Dewey LD API
that would allow them to easily lookup DDCs in exchange for LD URIs/URLs
and Descriptions.
To this end, we propose the addition of a new Authority Framework plugin
for UNIMARC that will offer this functionality. This plugin builds on the
groundwork laid by Bug 40308, in order to offer 1-click DDC lookups from within
the Authorities cataloguing editor.
References:
[1] https://www.oclc.org/content/dam/oclc/dewey/versions/print/intro.pdf
[2]
https://www.ifla.org/unimarc-updates/unimarc-authorities-format-manual-online-ed/
[3]
https://www.oclc.org/en/news/releases/2024/20240815-uniform-resource-identifiers-for-ddc-numbers.html
[4] https://www.oclc.org/en/linked-data.html
[5] https://developer.api.oclc.org/dewey-ld
[6] https://entities.oclc.org/worldcat/ddc/
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