Variables, which will not change, like Name or Description:
Open the Structure SP8_S_Item inside the Directory RPG_Essentials/Items/Structures.
Here you can add any Values you want. Do not delete any of those who were created by me.
Variables which can change, like the Level of the Item.
Open the Structure SP8_S_Item_CustomData inside the Directory RPG_Essentials/Items/Structures.
Here you can add and delete any Values as you want.
To edit those Data at runtime you can call from the Inventory Component the Function TryToSetCustomData.
Important: Sometimes the Inventory Component needs to check if two Custom Datas are the same (For example checkIfInventoryContainsItem). If those two can be unequal you need to change the Function for it.
You need to open the SP8_Item_FunctionLibrary and edit the Function isCustomDataEqual.
This Function is used to check if the both Custom Datas are equal inside the Inventory Component.