thanks for the reply Barry.
yes, there is no such field "Parent Unique ID" in the default parameters, while the information must be in the system.
i am aggregating informations from several list into an element list (element data, layer-information, surfaces and openings). the openings will 'only' give me the "Parent Element ID", which works fine with my own models since i use only unique element ID's. but I would like to get rid of this 'restriction'.
is there any possibility to accomplish this somehow? preferably in a list rather then use SDK. (e.g. read-out some tree-view of UID's).
Any help appreciated!