Bug 35035

Summary:	Koha hide field values in reference fields based on $w
Product:	Koha	Reporter:	verolencinas <verolencinas>
Component:	MARC Authority data support	Assignee:	Bugs List <koha-bugs>
Status:	NEW ---	QA Contact:	Testopia <testopia>
Severity:	major
Priority:	P5 - low
Version:	22.11
Hardware:	All
OS:	All
Change sponsored?:	---	Patch complexity:	---
Documentation contact:		Documentation submission:
Text to go in the release notes:		Version(s) released in:
Circulation function:

Description verolencinas 2023-10-11 16:07:34 UTC

The Marc 21 Format for Authority Data includes the possibility to not display data in reference fields (4XX and 5XX) based on the third value of subfield w.
"/3 - Reference display
One-character alphabetic code that enables the generation or suppression of a cross reference from a 4XX or 5XX field. 
a - Reference not displayed
b - Reference not displayed, field 664 used
c - Reference not displayed, field 663 used
d - Reference not displayed, field 665 used
n - Not applicable"

The possibility to hide data is important for example for authority records of trans people. The Metadata Best Practices for Trans and Gender Diverse Resources of the Trans Metadata Collective (2022) includes this recommendation in 3.2.4.2 Technical details (MARC & RDA). Catalogers should be able to record former names to assure findability of resources, but it should be also possible to hide them for the public in compliance with cataloging ethics guidelines.