u/ObjectiveResearch300

Hi,

I'm reaching out with what might be considered a silly question but I'm looking for help when it comes to how to create subject headings.

I do mostly copy cataloging in my job but am coming to do more original cataloging and am struggling with creating subject headings and finding resources or how-to's. My question is, how do you know when to apply $x, $z or $v?

If anyone could be of help, I'd really appreciate it.

Thanks.