[O] Tracking Tags ??

[David Masterson]

Anyone have a good method of tracking the Tags that you've use across
all of your Org files?  Some sort of Tag Index to help you keep track of
the tags you've used and where you've used them so that you don't start
creating new tags that differ from old ones by (say) capitalization?  Or
to help you find everything tagged a certain when you're moving to a new
tagging style?  Perhaps an index where you could keep a note on why and
when you created the tag?

Is there any tools for this?
--
David