Event listening
You can create new event types that can be used for historical reporting. The creation of a new event type is initiated by the configuration of a new trigger. Relating a trigger with an action of type Reporting channel will create a new event type found in the event filter results of the Chart component.
When a trigger reacts to an event, it only executes its actions if its conditions are met.
If you modify a relation between two entities, the change event is only produced on the changed entity's side. In other words, if a trigger condition is set to observe an entity's relation, the trigger only executes if the relation is updated from the referenced entity's side. This is important when configuring a trigger condition.
For example, to configure a trigger that executes each time an asset is removed from a collection, you set the trigger condition to observe the M.Asset entity definition, specifically the CollectionToAsset relation. In this case, if the asset is removed from the collection from the asset's side, the trigger executes; however, if the asset is removed from the collection's side, the trigger doesn't execute.

For a trigger to execute when an asset is removed from a collection, regardless of the source of change, the trigger condition must include both the M.Asset entity definition and the M.Collection entity definition, each specifying the CollectionToAsset relation.
