Solution : https://service.sap.com/sap/support/notes/1578511 (SAP Service marketplace login required)
Key words :
tab page difid accedifid access strategdifid access strategydifid access strategy choose, data element /fre/dif_difid_pkg_strat call transaction se11, domain /fre/dif_difid_pkg_strat call transaction se11, badi /fre/db_dif_badi_002 call transaction se18, db_dif_badi_002_packages determines location product packages, define dif package strategy method, software component scm scm, tab page data type, dif id change pointers, creating dif id packages