Project(Extend(Extend(Project(Extend(Extend(Project(Extend(Extend(Extend(Extend(Extend(Extend(AggregationJoin(Aggregation(??agg1: ?pid, SAMPLE,
                                                                                                              {},
                                                                                                              G1=Group((?pid,
                                                                                                                 ?cond),
                                                                                                                 Join(ToMultiSet({{(?pid, <http://www.example.com/products/Rl5RVl5R>)},
                                                                                                                      {(?pid, <http://www.example.com/products/Rl5RVl5Q>)},
                                                                                                                      {(?pid, <http://www.example.com/products/Rl5RVl5W>)},
                                                                                                                      {(?pid, <http://www.example.com/products/Rl5RVl5Y>)},
                                                                                                                      {(?pid, <http://www.example.com/products/Rl5RVl5U>)}}),
                                                                                                                 Extend(Extend(BGP( ?pid ^<http://www.example.com/datam/op/isOfferOf> ?offid .
                                                                                                                                ?offid <http://www.example.com/datam/dp/condition> ?cond .
                                                                                                                                ?offid <http://www.example.com/datam/dp/price> ?price),
                                                                                                                        ?newIncrement,
                                                                                                                        if((?cond = 1), 0, 1) ),
                                                                                                                 ?oldIncrement, 
                                                                                                                 if((?cond = 1), 1, 0) )))),
                                                                                              Aggregation(??agg2: ?cond, SAMPLE,
                                                                                              {}, G1),
                                                                                              Aggregation(??agg3: ?offid, SAMPLE,
                                                                                              {}, G1),
                                                                                              Aggregation(??agg4: ?price, MIN,
                                                                                              {}, G1),
                                                                                              Aggregation(??agg5: ?newIncrement, SUM,
                                                                                              {}, G1),
                                                                                              Aggregation(??agg6: ?oldIncrement, SUM,
                                                                                              {}, G1)),
                                                                                       ?pid,
                                                                                       ??agg1),
                                                                                ?cond,
                                                                                ??agg2),
                                                                         ?oid,
                                                                         ??agg3),
                                                                  ?minPrice,
                                                                  ??agg4),
                                                           ?newOffs,
                                                           ??agg5),
                                                    ?usedOffs,
                                                    ??agg6),
                                            {?pid, ?cond, ?oid, ?minPrice, ?newOffs, ?usedOffs}),
                                            ?usedOid,
                                            if((?cond = 0), ?oid, ?null) ),
                                     ?newOid,
                                     if((?cond = 1), ?oid, ?null) ),
                              {?minPrice, ?cond, ?newOffs, ?usedOffs, ?pid, ?newOid, ?usedOid}),
                      ?finalNewOffs,
                      if((?newOffs = 0), ?null, ?newOffs) ),
               ?finalUsedOffs,
               if((?usedOffs = 0), ?null, ?usedOffs) ),
        {?minPrice, ?cond, ?finalNewOffs, ?finalUsedOffs, ?pid, ?newOid, ?usedOid})