Since this is a research-oriented site, why not use the standard classification and tagging system for research physicists and astronomers?...
Also, for paper-specific posts, I humbly submit the following suggestion.
The goal of TP SE was to make this the default site - (or amongst the default sites) - for research (theoretical and mathematical) physicists to post and respond to questions. So, I think, adopting the STANDARD classification / tagging scheme from the outset might help us maintain our objective and perspective as we - hopefully - gain new members, et cetera.
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