Could you help me with this question?
At some point, it is said:
"In principle, alternative historical data can come from any data source.
· In SAP R/3, a technical link to the component SAP BW is provided as standard, which you can use to load alternative historical data into SAP R/3.
· You can link to any other data source using the Business Add-Ins (BAdI) provided."
This alternative data source, what does it refer to? Can it be another SAP componente (besides BW) or a different data source such as a .xls?