Dear Christian and BaseX developers,

just wondering if adding something like the following would be hard to implement.

store:observe($key as xs:string, $observers as function(*)*)

with $observers being something like 

function($key as xs:string).

The semantics is to call the registered observers whenever a value associated with the key in the store changes (put, remove, clear, ..).

This would allow for nicely decoupled observer - notification pattern.

Does it make sense?

Regards,

Marco.