It is possible to modify the way WTPart dynamic structures are generated by providing a custom hook to exclude parts, use representations other than the default representation of the part, or to include the entire representation for an assembly instead of merging the representations associated to its children. For more information, see the “Modifying the Default Behavior of Dynamic Part Generation” section of the Windchill Customization Guide, or by examining <Windchill>\prog_examples\wvs\com\ptc\wvs\PartStructureFilter.java.