Currently only this is possible when configuring value maps:

(lets assume it's regarding temperature)

0 -> cold 
1 -> cold 
2 -> cold 
4 -> warm 
5 -> warm 
6 -> warm 
7 -> hot 
8 -> hot 
9 -> hot

Quite often (a lot!) I hear the question "are ranges supported?"

eg:

0 - 3 -> cold
4 - 6 -> warm
7 - 200 -> hot

With the change of valuemaps in 5.4 I think this would be an awesome addition that will be used a lot!