Confusing about Query 0D_SD_C03_Q006

In columns of Query designer, system use Restricted Key Figures like below,

[0D_NO_DEL_ITEMS] No. of Delivered Items;

[0D_DEL_QTY] Delivery quantity;

[0D_DEL_GRS_WT] Delivery gross weight;

[0D_DEL_NET_WT] Delivery net weight;

[0D_DEL_VOLUME] Volume delivered;

Actually, we can not find above InfoObject in BW system. So, it means Restricted Key Figures during Query designer creation is dummy, because we can not find it in BW system. After we execute this query, system show the relevant data. Now, we are compeletly confused how system can know the relationship? Who can explain the relationship will be high appreciated.