Apologies, that's a very semantic folding specific term -- with retina I refer to a word -> fingerprint database that gives you either fingerprints of single wo

Apologies, that's a very semantic folding specific term -- with retina I refer to a word -> fingerprint database that gives you either fingerprints of single words or of blocks of text (by applying relevant heuristics to filter out irrelevant noise / heavily used words in a specific language).