Should we introduce { and } in tags, if it's possible, technically?
It would be useful to mark environments, like {itemize}, {center}, {table}. We could distinguish {table} environment questions from such regarding tables like tabular constructs.
Would it be meaningful to see when a tag means an environment (center, quotation, quote) instead of a concept (centering, quoting)?
As some other questions show, I'm thinking about a clear understanding if a tag means a concept, class, package, environment or command - a lot of names are very similar. I made separate questions because a feature request like \ in tags is different than just to agree in tag names like [book-class] or discussing how environments should be handled.
Another drastic way would be tagging like book-cls, cite-pkg, center-env, cite-cmd, ...
Any other ideas or sugegstions?