The where-used list supports you in finding dependent requests in further targets. The where-used list therefore allows you to delete across several persistence layers.
You can call the where-used list for DTP requests in InfoCubes and DataStore objects if the request has already been loaded into other data targets. You can also call the where-used list for requests in the PSA tables of the DataSource (R3TR RSDS).
The where-used list displays the source request and all related target requests in a hierarchy. You can delete requests directly from the where-used list display.