Hi Daniel,
Thanks you a lot for your answer!
That means, I have to calculate the parent node on $contextNode = // YOUR CALCULATION HERE;?
Do you have a small hint how I can achieve this? I’m still a bit the PHP dummy 
Hi Daniel,
Thanks you a lot for your answer!
That means, I have to calculate the parent node on $contextNode = // YOUR CALCULATION HERE;?
Do you have a small hint how I can achieve this? I’m still a bit the PHP dummy 