To add master data with Infocube data in SAP BW, start by creating a basic Infocube. This creates a physical location for the data in SAP BW. Next, set your attributes for the handling of master data. The master data must also have a hierarchy. Once these are established, the master data can be uploaded and becomes an Infocube characteristic. The characteristic will have its own set of attributes such as text. The characteristics can be updated but the master data itself will remain the same in the Infocube.