another thought. i haven't looked at the list carefully enough to notice, but is each element represented once and exactly once? when i first suggested i wanted to create a list like this, i planned on having some elements in possibly more than once category.

for instance, a category called "inline markup" might contain the element <computeroutput>, and another category called "computer specific markup" might contain the same element.

not a big deal, just an observation that sometimes a single element can be viewed from a couple different perspectives.