This is about a similar idea than what we are developing with Voice.
We already have the “examples” feature which links texts that have the same key phrase, like “root of suffering”. You can see our current list of examples terms here. We are constantly adding new terms we find interesting and which relate, ideally, to a reasonable number of results. There’s no point in adding “so have I heard” to the examples list.
Our idea is to list terms that lead to important doctrinal points or other interesting and distinctive features. One way of doing this is using the similes that point to them. Try for example typing “water”, and you’ll see, among others, these terms:
- water overgrown with moss
- water stirred by the wind
- water that was cloudy, murky, and muddy
- water that was heated by fire
- water that was mixed with dye
which lead to Suttas that have the related similes for the five hindrances.
In the latest development steps we have included a preview function so that when starting to type “water”, as in the current case, you can see which phrases are available that have this word. Try typing “nun” for example, and you’ll get this interesting choice of terms:
(Note in particular the “pleasure of renunciation”! 
) Click on one of them and you’ll get a list of the search results that belong to this term.
For the future we have still some ideas how to develop this further. For example, we’d like to put links into the Sutta texts themselves that highlight any term in that Sutta that occurs in the “examples” list. So if you see “pleasure of renunciation” highlighted in a Sutta, click on it, and you’ll see a list of all Suttas that have this term. But that’s for the future …
All this is however only possible because we limit our search to segmented texts that are consistent in their terminology—as are currently Bhante Sujato’s English translations, and in a state of being gradually created, my own German ones. For exactly this reason the Jatakas are currently not part of the scope of Voice.
