If output mapping is deleted, should associated device and measurements be deleted?

[ritchiecarroll]

Or should these be retained for history reasons?

[chefsteph9]

What about having that as a setting and letting the user decide if they want to automatically delete everything?

[contributor51]

If the output mapping is an input to my analytic, then if it is deleted I still want a placeholder where the mapping used to be so that my analytic does not break. The placeholder can be something that represents a null input, but it still needs to be there. Beyond this point, I am ambivalent whether history remains.