There have been a number of research prototypes in that direction including Susan Dumais' Stuff I've Seen [1], which was Windows desktop-oriented but I think ha

There have been a number of research prototypes in that direction including Susan Dumais' Stuff I've Seen [1], which was Windows desktop-oriented but I think had the right idea. > much knowledge work involves finding and re-using previously seen information. We describe the design and evaluation of a system, called Stuff I’ve Seen (SIS), that facilitates information re-use. This is accomplished in two ways. First, the system provides a unified index of information that a person has seen, whether it was seen as email, web page, document, appointment, etc. Second, because the information has been seen before, rich contextual cues can be used in the search interface. Might be worth revisiting their papers to see what they learned. [1] (PDF of SIGIR paper) https://www.microsoft.com/en-us/research/wp-content/uploads/2003/01/siscore-sigir2003-final.pdf https://www.microsoft.com/en-us/research/wp-content/uploads/...