I thought that the initial random numbers generator would be necessary. However, with the random matcher it is not. Using this random number generating tool was just an idea by me but is in no way necessary.
In the end what I need is a random value from the lower table (the “rnd name table”).
Thank you, that looks pretty good. The problem is the config of the random number assigner. I used the node as well but realized, that the values to choose from (the bottom table in my example) will change. This “selection” will be executed in a loop for each “data set” which in itself than has 5 (or whatever) values. Sorry, if I didn’t mention that before.
This nodes finds all the available categories in the current input dataset, hence the categories get updated for the Random Number Assigner node each time the nodes are executed.