So I’d like to propose the following tagging scheme illustration updated with your suggestions:
I’ve also made a simplified one hiding all objects in the illustration that depict optional or complex tagging methods:
I didn’t add the title and footnotes in this illustration because I think it’s the Wiki page’s job to explain the tagging scheme, the illustration only extends that. (I also intend to edit the Wiki page accordingly.) And I think that colors don’t really need an explanation on the illustration as they’re just visual guides for grouping tag categories, but they could be featured on the Wiki file page.
Please let me know your thoughts on these!