Marcel,

An Iterator is just an object that returns an object reference. These will come from some collection of objects.

A Visitor is an object that reads and/or writes the properties of the object it is visiting.

>Is a iterator/visitor object type more than a reference collection ?
>
>If it is I solve similar problem with two arrays in a collection object
>The first handle reference to objects and the second handle parameters object related to each reference in the first array.