Solution : https://service.sap.com/sap/support/notes/668067 (SAP Service marketplace login required)
Key words :
alert display structure, alert object type, terms alert monitor, import support package 7, import support package 18, import support package 27, related existing layouts, apo release 30a, existing layouts, apo release 310
Related Notes :
| 826285 | SDP/DP: Layouts for SDP/DP alerts are lost |