I remembered that I'd seen some kind of semantic text editor, the one I thought about is here: http://nlp.shef.ac.uk/wig/aktivedoc.h... Not sure it is what we are after here, and it is quite old, but it might be worth a look

evabl444 commented on Requirements have been voted on (written by bergie) 29.05.2009 (en) posted to #iks-project