8.7 Searching for Feasible Solutions

indomain(+DVar)

This predicate instantiates the domain variable DVar to an
element of its domain; on backtracking the subsequent value is taken.
It is used, for example, to find a value of DVar which is consistent
with all currently imposed constraints.
If DVar is a ground term, it succeeds.
Otherwise, if it is not a domain variable, an error is raised.
 labeling(+List)

The elements of the List are instantiated using the
indomain/1
predicate.

⊙
 Additional information on search algorithms, heuristics and their
use in ECL^{i}PS^{e} can be found in chapter 12.