?$v - is the form/genre; $x - is about the form genre.  How you can have a Congress of $v is beyond me (perhaps the pictures got together at night after the museum closed and started conferring).

Aaron Kuperman

LC Law Cataloging Section

This is NOT an official communication from my employer.

From: Program for Cooperative Cataloging <[log in to unmask]> on behalf of Yang Wang <[log in to unmask]>
Sent: Tuesday, March 31, 2020 8:37 AM
To: [log in to unmask]
Subject: [PCCLIST] $v Art vs $x Art

What is the difference between the following subject headings (Cf. bib (OCoLC) 52442717) vs (OCLC) 150835830)?

Athena ?c (Greek deity) ?v Art ?v Congresses
Athena ?c (Greek deity) ?x Art ?v Congresses

And (Cf. (OCoLC) 45539635) vs (OCoLC) 466762391)?

Athena ?c (Greek deity) ?v Art ?v Exhibitions
Athena ?c (Greek deity) ?x Art ?v Exhibitions

The SHM instruction under "H 1110 $v Art" seems to have been causing this problem on a massive scale in OCLC. The second part of the sentence where it states "[Use for] ... or works for discussing such art" is perhaps the culprit. This part actually refers to the use of "$x Art" (lccn sh 99001934) and not "$v" (lccn sh 99001267).

For the sake of clarity, why not insert "$x Art" somewhere in the text?