Fill unbound variables by a range

Question

lets say that L is L = [[1,100,_], [200, _,94]]. I have a code where I use

append(List, L), L ins 1..90, .......

L ins 1..90 is false because there are elements which are not in the domain. But I want L ins 1..90 to only specify the unbound variables not the whole list. Is there a way for that? Thanks

Answer 1

List = [[1,100,_], [200, _,94]],
append(List, L),
partition(ground, L, _, Unground),
Unground ins 1..90