OnTop is not a ressource, but rather a topic. There are 2 different ontop placements. So we have 2 different resources to add an ontop placement to a real estate. The requests and methods of the 2 ressources are similar, only the type of the OnTop placement changes.
if an object is deactivated in the is24 publish channel 10000, every given OnTop Placement will also be deactivated!
only one type of OnTop placements (first OR business) can be set per real estate.