Solution : https://service.sap.com/sap/support/notes/719556 (SAP Service marketplace login required)
Key words : 
classification change writes change pointers, pp/ds runtime object, terms production data structure, production data structure, task list operations, direct pds generation, class item solution, generated selection conditions, integrate class nodes, /3 runtime object
Related Notes : 
       
| 709884 | @3Z@ Consulting notes for PDS and ERP-PDS | 
| 706452 | Automatic generation after master data change |