Marcel,

UML is an object modeling language. The VFP object model is documented in the help file. The Visitor pattern is described in several books on patterns. The most noteable is "Design Patterns" by Gamma, Helm, Johnson and Vlissides. There are some links to other OO sites on the OOP page of my website. Also visit Steve Black's site from my Links page.

>Where can I found a complete object language reference ?
>
>For example I search "visitor" in Visual Modeler 1.0 Help nothing to find.
>Why ?
>Is UML not the standard of object language ?