Notification having multiple referenced element

As shown on the screenshot, a notification created will only reference an element which is created on. It would be more flexible if we are able to reference two or more elements at the same time. For example, as in the following setup : --Parent -Element1 -Element2 Each child element produces event frame and I would like to set up a single notification on the Parent element. Then it will trigger off a notification based on any event frames which were created in the Child element level. Currently, whenever another element is added (i.e. Element3), we would need to set up another notification for that new element. In case where the customer is using EMDVB and when it automatically creates an Element, it would not follow the element template so a template would not be a valid solution. The use case is, whenever EMDVB creates a child element, the Parent Notification will detect any event frames being created on its child elements and fire off a notification.