I organize my knowledge, but I have never heard of a topic map. So the answer to your question is, that not enough developers know about them, or that topic ma

I organize my knowledge, but I have never heard of a topic map. So the answer to your question is, that not enough developers know about them, or that topic maps are not useful enough to developers. Can you give an example of how they can be used? How are your using them? Why are they useful to you? I don't think it wouldn't be helpful to me to just organize my knowledge by topics/keywords. The tricky parts are the concepts, not the connections between topics/keywords.