ILOG OPL Development Studio Language Reference Manual

Preprocessing dataYou can preprocess data before the optimization model is created by using ILOGScript/JavaScript syntax encapsulated in execute blocks.OPL provides script integration with the modeling language. All declared model elementsare available for scripting via their name.The functionality available for an element depends on its type. All elements can be read, butmodifications are possible only for primitive types (int, float, string) and primitiveitems of arrays and tuples. See the intro to the Reference Manual of ILOG Script Extensionsfor OPL about these limitations.You can change the domain boundaries for decision variables, as well as their priority, in thepreprocessing phase.You can also use preprocessing to change CPLEX or CP Optimizer parameter settings (seeChanging option values in the Language User’s Manual).Elements of a range or constraint type are immutable.Example:int n = ...;range R = 1..n;int A[R] = ...execute {for(r in R) {if ( A[r]