Java implementatino for AND-OR trees. And also for its visualization?

Hi,
I need to have an implementation of an AND-OR tree, that is, a tree in which the children of a node can either be conjunctive or disjunctive (normally the parent is consider an AND-node or an OR-node). The reason is that I need to represent Prolog rules in a java structure (not simply as a string). Do you know of any public implementation of such a structure?
In addition, do you know of any existing visualization package or implementation that represents such a structure?
Thank you in advance.
D.

Contact the sales departments of the manufacturers (Giesecke&Devrient (G&D) and Oberthur, and maybe also NXP). They will refer you to the distributor/reseller for your area, through whom you can establish an NDA with the manufacturer and get access to the specification documents.
Adriaan

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