Hi M,
by seeing name itself we can find whether data source is standard or generic one.
Generic data sources always starts with Z or Y(which we create at ecc side).
in bw side we can create generic data sources which start names with A* to Z*
Standard data sources always starts with 0*.
You can search your data sources at RSA5 and RSA6.
RSA5 - it will shows all standard data sources.
RSA6 - Will shows standard/activated data sources and generic data sources as well.
Thanks