Is the tag supposed to be used for questions about the trace operator from Sobolev theory (analysis)?

I was going to de-tag "trace" from a question, but it seems like it's not the first time this happened,

The description of the trace tag says it can be about the "trace of functions", but its quite far off from the other meanings of "trace" in mathematics, but I suppose it would help someone search, e.g. if they search for a combination of tags "trace" with "pde". Should I let it be?

This question has been almost asked before here, but with no answer: A sufficiently general tag wiki for "trace"?

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    $\begingroup$ Here is a SEDE query looking for instances where (trace) was removed: data.stackexchange.com/math/query/1038474/… - I have mentioned a few similar queries in chat. I will also mention that there is a tag called (trace-map) which has empty tag-info. It is used 11 times with (sobolev-spaces). $\endgroup$ May 11 '20 at 5:25
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    $\begingroup$ 11/34 is a much larger proportion than 48/1148 (trace+sobolev-spaces vs just trace tag). I suppose you're suggesting that one option to consider would be to repurpose trace-map? $\endgroup$ May 11 '20 at 5:50
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    $\begingroup$ Another unrelated use of the word, knot traces, is a hot topic recently. I'm in favor of using distinct tags for such widely separated topics, and will supply tag information for trace-map. $\endgroup$
    – hardmath
    May 22 '20 at 19:05

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