Holdings - 852 subfield d
What is this?
In a holdings record, 852 subfield $d is for "former shelving location"; that is, "Call numbers/shelf numbers where a resource was previously located, in cases of a relocation or a reordering/reorganization of a collection as a whole".
When is this trouble?
If your library does typically not use $d in holdings records, it may be in there accidentally:
852 01 ‡b storage ‡c rs ‡h QA75.5 ‡i .S958 ‡x paid by LLE ‡d 19970425(used to record a date)852 00 ‡b young ‡c yl3 ‡h DS119.8.J67 ‡d L85 1999(instead of ‡i)852 0_ ‡b finearts ‡c fa ‡h M1507 ‡i .Z37 2000 ‡d(call number should end2000d)852 0_ ‡b young ‡c ylsd ‡h HE 20.7102:L 97/3/996 ‡d o not discard(should be a ‡x note)
If you are using $d for its intended purpose, $d subfields that do not indicate a former location will create confusion in reports.
If the $d was used to record the date in a note, that date will not be part of the notes if those fields are specifically queried.
If the $d was a "d" in the call number, that part of the call number will not be visible in the catalog
If part of the call number is stored in a $d instead of a $i, that part of the call number may not show up in online catalog display, and may not have even made it to the spine label of the book.
How to Find
If you are in Alma, there is an analysis to search for this issue in the "Looking for Trouble" folder. Go to the "Holdings" folder and look for the "852 subfield d" analysis.