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 ECLⁱPS^e can be found in chapter 12.