Deleting data deleted in the source system with idoc in the target system

[semaglt]

How can I delete a data that is deleted in the source system using idoc?

For example, let's say a DE definition is deleted from a data in a material table.
How can I ensure that this DE definition is deleted in the target system with IDOC?

[helmut_skolaut3]

The easiest way is to use IDOCs with Change Pointers. They will create in each segment MSGFN that indicates what happened:

In S/4 HANA concept would be to enable Events - you will get a notification what happens (e.g. create/delete/update) into your Event Infrastructure while you have to subscribe to that event from Cloud Integration and call back the API to read the relevant payload that you need to send to the receiver.

IMO  - the Eventing is not yet major enough and I would still wait a bit before using this technology - but you cannot make something wrong if you setup change pointers. 

BR Helmut