Structured Formats and "Knowledge Management"

Blogger is very nice for getting something up easily and it's simple to use. Alas, I forgot it doesn't seem to have categories or tags (why not? it's not that hard to support; weird). Oh well. I really just want to motivate myself to write stuff up, so it's good enough for now. The other thing I would like is more structured explications. I played around a little with this back in grad school for some classes I taught. For example, in an outline, some headings are "topics" and some are part of a reconstruction of an argument. It would be nice to be able to distinguish these in a format. But again, actually doing stuff is more important than nice IT, so HTML it is for now.