Pretty cool!

Not to be pedantic (I hate that word), but in the spirit of improvement, you may want to spell check your popups.

(example: "<bdi> Text that is seperated from directional formatting of its surroundings."

... should be separated)

At first, I looked at this chart, and thought "cute, but what good is it." Then I started clicking on it, and eventually found myself printing it and hanging it in my office! Good work.