You can use an InfoSource to write data to the SAP BW system. An InfoSource is a collection of data in the SAP BW system that logically belongs together and is summarized into a single unit.
You can load data into two types of InfoSources:
InfoSource for transaction data
Use an InfoSource for transaction data to load data that changes often and is dependent on master data. For example, you can assign transaction data about sales development to a vendor’s master data and use the transaction data to determine the total sales of a vendor.
InfoSource for master data
Use an InfoSource for master data to load data that is frequently used and remains constant over a long period of time. For example, the master data of a vendor might contain the name, address, and bank account information for the vendor. Create an InfoSource for master data when you want to load data into an SAP BW hierarchy.